Chemicals Monitoring and Water Quality

Chemicals Monitoring and Water Quality

The chemicals monitoring and water quality research group undertakes pure and applied researches to understand the levels and risks of emerging contaminants of global concern. We are interested in mapping contaminants including heavy metals, pesticides, PAHs, EDCs, PPCPs, PCBs in aquatic environment with a view of developing new sustainable materials for their removal. We also desire to understand how changing climate impacts movement, quality and quantity of water.

Our project aims to model sustainable methods for achieving cleaner water, safer and enough food, pollution reduction, ecological and health risk assessment of prevalent chemical contaminants in our aquatic environment.

We work in a broad range of environments: from streams, through agricultural soils, groundwater, rivers and wetlands, to the coastal waters. Due to the interdisciplinary nature of our research, we work with chemists, microbiologists, GIS experts, and social scientists.

Since our laboratory infrastructure is under development, we work with many foreign collaborators to achieve most of our research aims. These include Lancaster Environment Centre at Lancaster University, International Environmental Research Centre at Gwangju Institute of Science and Technology (GIST) South Korea, etc.

Most of our researches and programmes have global relevance and have attracted funding supports from many organisations such as the TETfund, American Chemical Society (ACS), United Nations Office for South-South Co- operation, etc.

    • Modelling and Prediction of Ground Water Quality in Akwa Ibom State Using Artificial Intelligence (funded by TETFUND Institution-Based Research Grant 2025, ₦2,700,000)
    • Nature-Inspired Biobased Filters for Water Treatment (funded by TETFUND Institution-Based Research Grant 2022, ₦2,000,000)
    • Climate Variability in Relation to Floodplain Erosion and Water Quality Characteristics of the Ikpa River Basin (funded by the Ministry of Science and Technology South Korea through the International Environmental Research Institute Gwangju Institute of Science and Technology in 2018)
    • Assessment of the occurrence and risks of emerging organic pollutants (EOPs) in Ikpa River Basin freshwater ecosystem, Niger Delta, Nigeria (funded by the Ministry of Science and Technology South Korea through the International Environmental Research Institute Gwangju Institute of Science and Technology in 2013 to 2015)
    • Pesticide mapping of agricultural soils in agricultural zones in Akwa Ibom State (funded by TETFUND IBR 2017)
  • Prof. Edu Inam Team leader

    Prof. Edu Inam

    Professor of Analytical/Environmental Chemistry

    Contact: eduinam@uniuyo.edu.ng +2348181750861

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    Prof. Helen Etuk

    Prof. Helen Etuk

    Professor of Inorganic/Environmental Chemistry

    Contact: helenetuk@uniuyo.edu.ng +2348023050529

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    Dr. Nnanake Offiong

    Dr. Nnanake Offiong

    Assistant Professor, Topfaith University

    Contact: nnanakeoffiong@gmail.com +2348029197335

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    Dr. Ime Udoro

    Dr. Ime Udoro

    Lecturer II

    Contact: +2348135058723

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    Patience Asuquo

    Patience Asuquo

    PhD Student

    Contact: imensikak12@gmail.com +2348060111908

    Akwaowo Imoh

    Akwaowo Imoh

    PhD Student

    Contact: akwaowoinyangudoh20@gmail.com +2348032278752

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    Uduak Friday Udotong

    Uduak Friday Udotong

    PhD Student

    Contact: uduakudotong2@gmail.com +2348024787324

    Cecilia Etukudo

    Cecilia Etukudo

    Graduate Student/Assistant, Environmental Chemistry

    Contact: ceciliaetukudo.msc@uniuyo.edu.ng +2347085631964

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  • 2026

    1. Shaibu, S. E., Essien, N. S., Anweting, I. B., Udo, I. E., Archibong, E. S., Ibuotenang, N. D., Inam, E. J., Fapojuwo, D. P., Akpan, N. A., Offiong, N. O. (2026). Manihot esculenta Leaves Extract Mediated Silver–Clay Nanocomposite for the Adsorption of Cadmium(II) and Chromium(VI) Ions from Aqueous Media. Physchem, 6(3), 50. DOI: https://doi.org/10.3390/physchem6030050
    2. Asuquo, P. O., Asuquo, U. A., Asuquo, M. E., Udoh, A. I., Etuk, H., Usip, P., Inam, E. J. (2026). Evaluation of machine learning models in the prediction of water quality index for selected water sources in Uyo, Akwa Ibom State, Nigeria. Discover Water. DOI: https://doi.org/10.1007/s43832-026-00434-y
    3. Ofon, U. A., Offiong, N. O., Okon, D. T., Ndubuisi-Nnaji, U. U., Akpan, A. O., Udo, G. J. (2026). Inoculum-dependent microbial communities and the inoculum-to-substrate ratio regulate biomethane potential during co-digestion of solid wastes. Scientific Reports. DOI: https://doi.org/10.1038/s41598-026-65227-8
    4. Ambrose, I. S., Offiong, N. O., Ayua, T. J., Ebong, G. A., Ambrose, E. I., Silas, I. I., Saturday, U. U. (2026). Seasonal dynamics of atmospheric heavy metals and total hydrocarbon content at the Edonwhii Beach, Nigeria. Discover Environment, 4(1), 200. DOI: https://doi.org/10.1007/s44274-026-00712-5
    5. Chandrasekaran, R., Wan Azelee, N. I., Chaukura, N., Gwenzi, W., Offiong, N. O., Ighalo, J. O., Raizada, P., Prabhu, A. A., Paul, S., Raval, N. P., Selvasembian, R. (2026). Adsorptive Recovery of Rare Earth Elements: Current Progress, Challenges and Emerging Perspectives. Separation & Purification Reviews, 1-21. DOI: https://doi.org/10.1080/15422119.2026.2623550
    6. Offiong, N. O., Fatunla, O. K., Okop, I. J., Udo, M. D., Essien, C. P., Robert, G. A., Donatus, R. B., Egun, I. L. (2026). Co-solvent soil washing of PAHs and trace metals in contaminated ultisol using Portulaca oleracea aqueous extract and isopropyl alcohol. Chemistry and Ecology, 42(3), 290-306. DOI: https://doi.org/10.1080/02757540.2025.2609825
    7. Victor, I. A., Bassey, N. S., Etukudo, O. M., Offiong, N. O., Nangah, L. P., Noah, E. K., Johnson, E. I., Asuquo, I. E., Umoren, I. U., Edet, S. T. (2026). Therapeutic nanozymes in green microbial nanotechnology for biomedical applications. Green Microbial Nanotechnology for Biomedical Applications, 115-162. DOI: https://doi.org/10.1016/b978-0-443-36765-6.00008-9
    8. Adegoke, A. A., Fatunla, O. K., Ofon, U. A., Shaibu, S. E., Bassey, N. S., Offiong, N. O. (2026). Nanovectors for gene therapy and immunotherapy in green microbial nanotechnology for biomedical applications. Green Microbial Nanotechnology for Biomedical Applications, 81-114. DOI: https://doi.org/10.1016/b978-0-443-36765-6.00002-8
    9. Umoren, I. U., Offiong, N. O., Vite, N. W. (2026). Antioxidant and neuroprotective effects of Launaea taraxacifolia extract against aluminum-induced neurotoxicity. Advances in Biomarker Sciences and Technology, 8, 141-150. DOI: https://doi.org/10.1016/j.abst.2025.12.010

    2025

    1. Okon, O. E., Offiong, N. O., Shaibu, S. E., Inam, E. J., Ogudo, M. C., Archibong, E. S. (2025). Review of functionalised clay materials for the removal of bisphenol A from industrial and wastewater effluents. International Journal of Materials Research, 116(3), 157-172.
    2. Etukudo, C. I., Shaibu, S. E., Okon, E. O., Inam, E. J. (2025). Bio-Based Filter Materials for Wastewater Treatment - A Review. Journal of Materials & Environmental Sustainability Research, 5(2): 24-37.
    3. Udoh, N. F., Udotong, U. F., Shaibu, E. S. and Inam, E. J. (2025). Evaluation of Physicochemical Parameters and Water Quality Index (WQI) in Green River, Akwa Ibom State, Nigeria. European Journal of Science, Innovation and Technology, 5(5): 131-140.
    4. Ebong, G. A., Etuk, H. S., Ambrose, I. S. (2025). Tricycles and Their Impacts on Air Pollution within Uyo urban South-eastern Nigeria. Journal of Nepal Chemical Society, 45(1), 13-24. DOI: https://doi.org/10.3126/jncs.v45i1.74241
    5. Ebong, G. A., Okon, A. O., Ikpe, E. E., Etuk, H. S. (2025). Metals Loads in Organs of Local and Poultry Gallus Gallus Domesticus and Health Implications among the Young and Old Consumers. Universal Library of Advances in Agriculture, 1(1), 15-24. DOI: https://doi.org/10.70315/uloap.ulaag.2025.0101002
    6. Egun, I. L., Hu, J., Offiong, N. A. O., Akwaowo, E. S., Essien, E. S., Hou, Y., Chen, Z. (2025). Conversion of waste tires to porous carbon towards diverse applications with enhanced performance. Carbon Letters, 35(5), 1955-1980. DOI: https://doi.org/10.1007/s42823-025-00965-9
    7. Ofon, U. A., Ndubuisi-Nnaji, U. U., Udofia, G. E., Adegoke, A. A., Orji, E. E., Ekaette, M. I., Ukot, C. A., Offiong, N. O., Fapojuwo, D. P., Shaibu, S. E. (2025). Optimization of biogas production with rice straw-derived biochar: Characterization, hormetic effects, and kinetics modelling. Cleaner Waste Systems, 11, 100288. DOI: https://doi.org/10.1016/j.clwas.2025.100288
    8. Offiong, N. O., Okop, I. J., Shaibu, S. E., Akwaowo, E. S., Inyangudoh, A. I., Ibuotenang, N. D., Victor, I. A., Robert, G. A., Adegboyega, T. A., Benson, N. U. (2025). Bioindicators for monitoring atmospheric perfluorinated compounds: review of occurrences, transport, fate and analytical protocols. Environmental Chemistry, 22(2), EN24083. DOI: https://doi.org/10.1071/en24083
    9. Offiong, N. A. O., Ohaekenyem, E. C., Ntukidem, E. N., Magu, T. O., Alani, O. A., Ari, H. A., et al. (2025). K2CO3-MeOH-Catalyzed Synthesis and Computational Studies of 3-Chloro-2- Hydroxypropyl Stearate: Toxicity and Microspecies Distribution. Tropical Journal of Natural Product Research, 9(6), 2814-2820. DOI: https://doi.org/10.26538/tjnpr/v9i6.62
    10. Offiong, N. O., Ore, O. T., Aderibigbe, D. O., Bayode, A. A., Dabo, O. S., Akeremale, O. K. (2025). Removal of contaminants in drinking water using biochars. Biochar for Environmental Remediation, 169-189. DOI: https://doi.org/10.1016/b978-0-323-99889-5.00010-4
    11. Ofon, U. A., Ndubuisi-Nnaji, U. U., Adegoke, A. A., Offiong, N. O., Ewenike, O. P., Shaibu, S. E. (2025). Bioenergy potential of paper waste: Fungal pretreatment and kinetics modelling. Next Sustainability, 5, 100086. DOI: https://doi.org/10.1016/j.nxsust.2024.100086
    12. Abakedi, O. U., Ituen, N. E., Etukudo, C. I. (2025). Gmelina arborea Leaf Extract as an Eco–friendly Inhibitor for Mild Steel Corrosion in Acidic Medium. Journal of Materials and Environmental Science, 16(6), 1080-1091.

    2024

    1. Udoekpo, I. U., Inyangudoh, A. I., Awa-Arua, T. A., Ogwo, E., Offiong, N. A., Inam, E. J., Halsall, C. J. (2024). Assessment of organochlorine pesticide residues in agricultural soils of southern Nigeria and analysis of potential health risks. Toxicology Reports, 13, 101843.
    2. Udoukpo, F., Bassey, I., Yaro, C., Fatunla, O., Ita, B., Inam, E., Essien, J. P. (2024). Phytochemical associes of fungal endophytes in Nigeria Riverine Mangrove ecosystem. Journal of Materials & Environmental Sustainability Research, 4(3), 1-12. DOI: https://doi.org/10.55455/jmesr.2024.009
    3. Fatunla, O. K., Adegoke, A. A., Offiong, N. O., Ofon, U. A., Shaibu, S. E., Inam, E. J., Reddy, P., Essien, J. P. (2024). Catabolic gene indices of hydrocarbon diminution in Ultisol treated with cropped Bacillus altitudinis-amendments. Scientific African, 25, e02323. DOI: https://doi.org/10.1016/j.sciaf.2024.e02323
    4. Eyibio, I. K., Essiett, A. A., Atat, J. G., Essien, I. E., Essiett, U. A., Inam, E. J., Bede, M. C. (2024). Activity concentration, transfer factor and radiological health risk assessment of natural radionuclides in soil and maize in oil producing areas in Akwa Ibom state, Nigeria. World Journal of Advanced Science and Technology, 5(1), 001-010. DOI: https://doi.org/10.53346/wjast.2024.5.1.0074
    5. Etuk, H. S., Ebong, G. A., Ekot, A. E., Ekpo, B. O., Ayi, A. A. (2024). Mineral and elemental compositions of suspended particulate matter (SPM) and sediments from major rivers in the Southeastern Nigeria. International Journal of Aquatic Research and Environmental Studies, 71-89. DOI: https://doi.org/10.70102/ijares/v4i1/7
    6. Ebong, G. A., Etuk, H. S., Anweting, I. B., Ikpe, E. E., Ubuo, E. E. (2024). Probability of cancer and non-cancer hazards of toxic metals in waste-impacted soils on Environmental services workers and Scavengers in Nigeria. Journal of Materials and Environmental Science, 15(5), 770-792.
    7. Ebong, G. A., Johnson, A. S., Anweting, I. B., Etuk, H. S., Mkpenie, V. N. (2024). Synthesis of Cd (II), Fe (III), Cu (II), and Cr (VI) complexes of Schiff bases and their antibacterial activities. World Journal of Advanced Pharmaceutical and Medical Research, 6(2), 014-020. DOI: https://doi.org/10.53346/wjapmr.2024.6.2.0036
    8. Anweting, I. B., Ebong, G. A., Okon, I. E., Etuk, H. S., Etim, I. S. (2024). Physicochemical characteristics and heavy metals assessment of surface water and sediment from Idim Idaang stream in Ibiono Ibom, Akwa Ibom State, Nigeria. Journal of Materials and Environmental Science, 15(1), 72-82.
    9. Ante, J. E., Ineh, M. P., Achuobi, J. O., Akai, U. P., Atsu, J. U., Offiong, N. O. (2024). A Novel Lyapunov Asymptotic Eventual Stability Approach for Nonlinear Impulsive Caputo Fractional Differential Equations. AppliedMath, 4(4), 1600-1617. DOI: https://doi.org/10.3390/appliedmath4040085
    10. Dobbelaar, E., Goher, S. S., Vidal, J. L., Obhi, N. K., Felisilda, B. M. B., Choo, Y. S. L., Ismail, H., Lee, H. L., Nascimento, V., Al Bakain, R., Ranasinghe, M., Davids, B. L., Naim, A., Offiong, N., Borges, J., John, T. (2024). Towards a Sustainable Future: Challenges and Opportunities for Early‐Career Chemists. Angewandte Chemie International Edition, 63(35), e202319892. DOI: https://doi.org/10.1002/anie.202319892
    11. Offiong, N. O., Inyangudoh, A. I. (2024). African Early Career Chemists Workshop & 8th Annual Symposium of the American Chemical Society, Nigeria International Chapter 2023. Pure and Applied Chemistry, 96(6), 793-794. DOI: https://doi.org/10.1515/pac-2024-2005
    12. Akpan, I. A., Offiong, N. O., Akai, U. P. (2024). Rate of reaction in terms of extent or advancement of the reaction. Journal of Chemical Society of Nigeria, 49(2). DOI: https://doi.org/10.46602/jcsn.v49i2.957
    13. Ofon, U. A., Ndubuisi-Nnaji, U. U., Fatunla, O. K., Akan, O. D., Shaibu, S. E., Offiong, N. O., Sandy, I. Y., Egong, E. J., Ibuotenang, N. D. (2024). Emerging trends in POME treatment and applications: chemical and biotechnological aspects. Journal of Materials & Environmental Sustainability Research, 4(1), 11-44.
    14. Obot, U. R., Udofia, G. E., Abraham, N. A., Fatunla, O. K., Inyangudoh, A. I., Essien, J. P., Etok, C. A., Udotong, I. R. (2024). Heterotrophic activity and hydrocarbon degradation in crude oil-contaminated coastal soil augmented with indigenous biosurfactant producing Pseudomonas sp. Journal of Materials & Environmental Sustainability Research, 4(2), 47-59.

    2023

    1. Ejoh, E. F., Essiett, A. A., Atat, J. G., Inam, E. J., Essien, I. E., Bede, M. C., Benjamin, E. U. (2023). Assessment of Soil to Cassava Transfer Factor of Radionuclides in Ughelli North Local Government Area, Delta State, Nigeria. Journal of University of Babylon for Pure and Applied Sciences, 31(3), 247-260. DOI: https://doi.org/10.29196/jubpas.v31i3.4844
    2. Akpakpan, A. E., Inam, E. J., Ita, B. N., Akpabio, U. D. (2023). Physicochemical Properties of Soda and Kraft Lignin Extracted from Gmelina arborea Wood. International Research Journal of Pure and Applied Chemistry, 24(4), 9-19. DOI: https://doi.org/10.9734/irjpac/2023/v24i4816
    3. Offiong, N. O., Udo, G. J., Inam, E. J., Ekanem, A. N., Awaka-ama, J. J., Uwanta, E. J., Dong, J. (2023). Screening of bio-derived surfactants for soil washing of PAHs: effects of substrate sources and trace metals distribution. Environmental Engineering Research, 28(2), 210502-0. DOI: https://doi.org/10.4491/eer.2021.502
    4. Shaibu, S., Inam, E., Moses, E., Ofon, U., Fatunla, O., Obadimu, C., Ibuotenang, N., Offiong, N., Ekpo, V., Adeoye, T., Udokang, E., Fapojuwo, D. (2023). Prospects of nanosorption and photocatalysis in remediation of oil spills. Journal of the Nigerian Society of Physical Sciences, 1043. DOI: https://doi.org/10.46481/jnsps.2023.1043
    5. Akpakpan, A. E., Inam, E. J., Itoro, E. U. (2023). Preparation, characterization and application of soda lignin and its ester derivatives as adsorbents in the adsorption of Pb2+ and Cd2+ from wastewater. Journal of Materials and Environmental Science, 14(1), 82-96.
    6. Okon, A. O., Ebong, G. A., Tombere, V. P., Anweting, I. B., Etuk, H. S., Ambrose, I. (2023). Toxicity profile of metals in water, sediments and Liza grandisquamis from Iko River, South-South of Nigeria. International Journal of Frontline Research in Pharma and Bio Sciences, 2(2), 001-016. DOI: https://doi.org/10.56355/ijfrpbs.2023.2.2.0020
    7. Ebong, G. A., Anweting, I. B., Etuk, H. S., Ambrose, I. S., Okon, A. O. (2023). Impacts of varied industrial activities within southern Nigeria on air environment and human health. GSC Advanced Research and Reviews, 17(3), 134-144. DOI: https://doi.org/10.30574/gscarr.2023.17.3.0469
    8. Etuk, H. S., Ebong, G. A., Okon, A. O., Anweting, I. B., Ekot, A. E. (2023). Spatial and seasonal variations, ecological and human risks of trace metals in major rivers within the oil producing zone of Nigeria. World Journal of Advanced Pharmaceutical and Medical Research, 5(2), 001-017. DOI: https://doi.org/10.53346/wjapmr.2023.5.2.0037
    9. Etuk, H. S., Okon, A. O., Ebong, G. A., Ekpo, B. O., Ayi, A. A. (2023). Seasonal and Tidal variations of DO, BOD, and Nutrients in Major Rivers within Eastern Niger Delta, Nigeria. World Journal of Advanced Research and Reviews, 20(1), 243-257. DOI: https://doi.org/10.30574/wjarr.2023.20.1.2014
    10. Etuk, H. S., Ebong, G. A., Anweting, I. B., Okon, A. O., Ekot, A. E. (2023). Sources and Health Risks of Inorganic Toxicants in Gallus Gallus Domesticus (Broilers) in Uyo, Nigeria. British Journal of Multidisciplinary and Advanced Studies, 4(5), 1-30. DOI: https://doi.org/10.37745/bjmas.2022.0302
    11. Ebong, G. A., Etuk, H. S., Okon, A. O., Anweting, I. B., Ekot, A. E., Essien, J. P. (2023). Air Quality Index of some Commercial Centres in Uyo Metropolitan Area, Akwa Ibom State, Nigeria. British Journal of Earth Sciences Research, 11(3), 28-46. DOI: https://doi.org/10.37745/bjesr.2013/vol11n32846
    12. Ebong, G. A., Etuk, H. S., Anweting, I. B., Ekot, A. E., Ite, A. E. (2023). Relationship between traffic density, metal accumulation, pollution status, and human health problems in adjoining soils and vegetables within the South-South Region of Nigeria. International Journal of Environment, Agriculture and Biotechnology, 8(3), 065-079. DOI: https://doi.org/10.22161/ijeab.83.8
    13. Dan, E. U., Ebong, G. A., Etuk, H. S., Daniel, I. E. (2023). Carcinogenic Potentials of Toxic Metals and Polycyclic Aromatic Hydrocarbons in Telfairia occidentalis and Talinum triangulare Impacted by Wastewater, Southern Nigeria. Environmental Protection Research, 110-129. DOI: https://doi.org/10.37256/epr.3120232136
    14. Offiong, N. O., Edet, J. B., Shaibu, S. E., Akan, N. E., Atakpa, E. O., Sanganyado, E., Okop, I. J., Benson, N. U., Okoh, A. (2023). Metagenomics: an emerging tool for the chemistry of environmental remediation. Frontiers in Environmental Chemistry, 4, 1052697. DOI: https://doi.org/10.3389/fenvc.2023.1052697
    15. Ma, T., Liu, M., Offiong, N. A. O., Duan, J., Liu, Y., Ren, H., Zhou, R. (2023). Highly-efficient peroxydisulfate activation by polyaniline-polypyrrole copolymers derived pyrolytic carbon for 2,4-dichlorophenol removal in water: Coupling mechanism of singlet oxygen and electron transfer. Journal of Hazardous Materials, 445, 130580. DOI: https://doi.org/10.1016/j.jhazmat.2022.130580
    16. Akpan, I. A., Offiong, N. O., Akai, U. P. (2023). The collision theory of unimolecular reactions: A second possibility to Lindemann’s proposal. Caliphate Journal of Science and Technology, 5(2), 123-126. DOI: https://doi.org/10.4314/cajost.v5i2.5
    17. Liu, F., Zhang, C., Li, H., Offiong, N. A. O., Bi, Y., Zhou, R., Ren, H. (2023). A systematic review of electrocoagulation technology applied for microplastics removal in aquatic environment. Chemical Engineering Journal, 456, 141078. DOI: https://doi.org/10.1016/j.cej.2022.141078

    2022

    1. Essien, J. P., Ikpe, D. I., Inam, E. D., Okon, A. O., Ebong, G. A., Benson, N. U. (2022). Occurrence and spatial distribution of heavy metals in landfill leachates and impacted freshwater ecosystem: An environmental and human health threat. PLOS ONE, 17(2), e0263279. DOI: https://doi.org/10.1371/journal.pone.0263279
    2. Nwoke, I. B., Uwah, E. I., Inam, E. J., Udosen, I. E., Udosen, E. D. (2022). Speciation of trace metals in sediment of a tropical river. Journal of Chemical Society of Nigeria, 47(6). DOI: https://doi.org/10.46602/jcsn.v47i6.829
    3. Offiong, N. O., Inam, E. J., Fatunla, O. K., Ofon, U. A., Abraham, N. A., Essien, J. P. (2022). Metagenomic signature and total petroleum hydrocarbons distribution in a crude oil contaminated ultisol remediated with biochar–humus sediment slurry. Remediation Journal, 32(4), 299-308. DOI: https://doi.org/10.1002/rem.21734
    4. Okon, O. E., Inam, E. J., Offiong, N. O., Akpabio, U. D. (2022). Aqueous Adsorptive Removal of Bisphenol A Using Tripartite Magnetic Montmorillonite Composites. Pollutants, 2(3), 363-387. DOI: https://doi.org/10.3390/pollutants2030025
    5. Essiet, A. A., Essen, I. M., Inyang, U. U., Inam, E., Essien, I. E., Isaac, E. O. (2022). Radioactivity Concentration and Radionuclide Transfer Factor Assessment in Afang Leaves (Gnetum africanum) Cultivated in Akwa Ibom State, Nigeria. International Journal of Research Publication and Reviews, 4290-4296. DOI: https://doi.org/10.55248/gengpi.2022.3.6.49
    6. Okon, O. E., Inam, E. J., Akpabio, U. D. (2022). Non-catalytic and catalytic pyrolysis of low-density polyethylene (LDPE) plastic waste into fuel-ranged hydrocarbons using Nigerian local clay composites. Journal of Materials & Environmental Sustainability Research, 2(2), 11-21. DOI: https://doi.org/10.55455/jmesr.2022.005
    7. Ofon, U. A., Shaibu, S. E., Ndubuisi-Nnaji, U. U., Inam, E. J., Okop, I. J., Enin, G. N., Offiong, N. O., Ibuotenang, N. D. (2022). Bio- and chemical surfactants for remediation of emerging organic contaminants. Emerging Contaminants in the Terrestrial-Aquatic-Atmosphere Continuum, 367-380. DOI: https://doi.org/10.1016/b978-0-323-90051-5.00023-7
    8. Shaibu, S. E., Inam, E. J., Moses, E. A. (2022). Biogenic silver kaolinite nanocomposite for the sequestration of lead and cadmium in simulated produced water. Journal of Material and Environmental Sustainability Research, 1(2), 13-25. DOI: https://doi.org/10.55455/jmesr.2022.002
    9. Shaibu, S. E., Inam, E. J., Moses, E. A., Abraham, N. A., Offiong, N. O. (2022). Remediation of Organic Pollutants Using Biobased Nanomaterials. Persistent Organic Pollutants in the Environment, 289-317. DOI: https://doi.org/10.1201/9781003053170-11-11
    10. Uwah, E. I., Etuk, H. S., Ekpo, I. E. (2022). Elemental and Proximate Analyses of Aquatic Animal Species Obtained in Ishiet River, Nigeria.
    11. Ebong, G. A., Etuk, H. S., Umoren, I. U., Umanah, K. I. (2022). Effects of NPK fertilizers on trace metals loads in soil and vegetables, bioavailability in vegetables and the related health risk using simulation techniques. World Journal of Applied Science and Technology, 14(2), 42-52.
    12. Ebong, G. A., Etuk, H. S., Anweting, I. B., Bassey, I. N. (2022). Soil Characteristics Interrelationship with Treated Soil Micronutrients in Nigerian Southern. Chemical Science International Journal, 51-63. DOI: https://doi.org/10.9734/csji/2022/v31i6828
    13. Etuk, H. S., Ebong, G. A., Dan, E. U., Udoh, H. F. (2022). Probability of Health Risk, Bioaccumulation, and Geochemical Fractions of Toxic Elements in Soils and Vegetables Impacted by Manures in Nigeria. Environmental Protection Research, 2(2), 75-94. DOI: https://doi.org/10.37256/epr.2220221485
    14. Ofon, U. A., Ndubuisi-Nnaji, U. U., Shaibu, S. E., Fatunla, O. K., Offiong, N. O. (2022). Recycling anaerobic digestate enhances the co-digestion potential of agro-industrial residues: influence of different digestates as sources of microbial inoculum. Environmental Technology, 43(28), 4472-4483. DOI: https://doi.org/10.1080/09593330.2021.1952313
    15. Alani, O. A., Alani, S. O., Ari, H. A., Offiong, N. O., Ugya, A. Y., Feng, W. (2022). Tetracycline degradation by efficient synergistic bio-templated CuO photocatalysis and Fenton hybrid process irradiated by visible light: influential parameters, and mechanisms. Journal of Materials Science: Materials in Electronics, 33(34), 25603-25618. DOI: https://doi.org/10.1007/s10854-022-09258-7
    16. Yang, C., Liu, F., Zhang, C., Offiong, N., Dong, J. (2022). Density-modification displacement using colloidal biliquid aphron for entrapped DNAPL contaminated aquifer remediation. Journal of Hazardous Materials, 432, 128641. DOI: https://doi.org/10.1016/j.jhazmat.2022.128641
    17. Zhou, R., Liu, F., Du, X., Zhang, C., Yang, C., Offiong, N. A., Bi, Y., Zeng, W., Ren, H. (2022). Removal of metronidazole from wastewater by electrocoagulation with chloride ions electrolyte: The role of reactive chlorine species and process optimization. Separation and Purification Technology, 290, 120799. DOI: https://doi.org/10.1016/j.seppur.2022.120799
    18. Zhang, M., Dong, J., Sun, M., Jiang, D., Sun, C., Li, X., Offiong, N. A. O. (2022). Experimental study of viscosity modification coupled with phase transfer catalysis for enhanced remediation of non-aqueous phase trichloroethene polluted heterogeneous aquifer. Journal of Hazardous Materials, 430, 128452. DOI: https://doi.org/10.1016/j.jhazmat.2022.128452
    19. Gwenzi, W., Selvasembian, R., Offiong, N. O., Mahmoud, A. E. D., Sanganyado, E., Mal, J. (2022). COVID-19 drugs in aquatic systems: a review. Environmental Chemistry Letters, 20(2), 1275-1294. DOI: https://doi.org/10.1007/s10311-021-01356-y
    20. Yang, C., Offiong, N., Zhang, C., Liu, F., Zhang, W., Dong, J. (2022). Density-regulated remediation of dense non-aqueous phase liquids using colloidal biliquid aphrons (CBLA): Force model of transport and distribution. Science of The Total Environment, 807, 151057. DOI: https://doi.org/10.1016/j.scitotenv.2021.151057
    21. Ari, H. A., Alani, O. A., Zeng, Q., Ugya, Y. A., Offiong, N. O., Feng, W. (2022). Enhanced UV-assisted Fenton performance of nanostructured biomimetic α-Fe2O3 on degradation of tetracycline. Journal of Nanostructure in Chemistry, 12(1), 45-58. DOI: https://doi.org/10.1007/s40097-021-00400-1
    22. Addison, F., Offiong, N., Han, Q., Wang, R., Liu, N. (2022). Nitrogen-doped mesoporous carbon material (NCMK-3) as a catalyst for the removal of 4-chlorophenol during persulfate oxidation and its efficiency after reuse. Environmental Technology, 43(2), 192-198. DOI: https://doi.org/10.1080/09593330.2020.1782994
    23. Inyangudoh, A., Chícharo, B., Mazzi, G., Hooshmand, S. E., Niekerk, G. V., Menezes, L., Delolo, F. G., Randles, A. N., Politano, F., Bollati, M. L. T., Tywabi-Ngeva, Z., Tshemese, Z. (2022). Making Global Green Connections: The Importance of Green Chemistry Summer School for Sustainable Development. Chemistry International, 44(4), 42-48. DOI: https://doi.org/10.1515/ci-2022-0417

    2021

    1. Offiong, N.A., Fatunla, O.K., Essien, J.P., Yang, C. and Dong, J. (2021). Soil washing of total petroleum and polycyclic aromatic hydrocarbons from crude oil contaminated ultisol using aqueous extracts of waterleaf. Environmental Technology, DOI:10.1080/09593330.2021.1961875
    2. Uwah, E. I., Okon, R. U., Udosen, E. D., & Udoidiong, O. M. (2021). Atomic Absorption Spectrophotometric Determination of Elements in Water, Fish and Sediment of Atabong River, Nigeria. Science, 9(4), 77-87.
    3. Uwah, E. I., Edem, E. M., Udosen, I. E., Udosen, E. D., Udoidiong, O. M., & Essien, A. M. (2021). Human health risk assessment of trace metals contamination in a tropical river. Journal of Chemical Society of Nigeria, 46(1).

    2020

    1. Offiong, N.O., Inam, E., Etuk, H. S., Essien, J. P., Ofon, U. A., & Una, C.C. (2020). Biochar and humus sediment mixture attenuates crude oil-derived PAHs in a simulated tropical ultisol. SN Applied Sciences, 2, 1930.
    2. Inam, E. J., Edet, J. B., Akpan, P. E., & Ite, K. E. (2020). Characterization and equilibrium studies for the removal of methylene blue from aqueous solution using activated bone char. Journal of Material and Environmental Science, 11(10), 1667-1675.
    3. Uwah, E. I., Nwoke, I. B., Inam, E. J. Udosen, I. E, Udosen, E. D. (2020). Health risk assessment of heavy metal contamination in New Calabar river. Bulletin Environmental Contamination and Toxicology, 105(2), 317 – 324. https://doi.org/10.1007/s00128-020-02921
    4. Osadebamwen, E. I, Essiett, A. A., & Inam, E. (2020). An evaluation of the chemical and radiological effect of uranium in rainwater from selected areas in Akwa Ibom State, Nigeria. International Journal of Research and Innovation in Applied Science, 5(9), 53 - 56.
    5. Asukwo, E. G., Solomon, E. H., Udo, D. E., & James, E. K. (2020). Variations in the levels, source, cancer and non-cancer risks of trace metals in the local and exotic fruits. World Journal of Advanced Research and Reviews, 6(3), 275-288.
    6. Uwah, E. I., Etuk, H. S., & Udoh, E. O. A. (2020). Quantification and Risk Assessment of Some Trace Metals in Vegetables Obtained in Sand Mining Environment of Ukat Nsit, Nigeria. American Journal of Applied Chemistry, 8(6), 135-142.
    7. Asukwo, E. G., Solomon, E. H., Udo, D. E., & Douglas, U. M. (2020). A comparative study on the metal loads and related human health risks of toxic metals between the vegetables from Southern and Northern regions of Nigeria consumed in Akwa Ibom State. World Journal of Advanced Research and Reviews, 7(1), 057-072.
    8. Uwah, E. I., Edem, E. M., Udosen, I. E., Udosen, E. D., & Udoidiong, O. M. (2020). Quantification of Pollutant Levels in Water, Sediment and Winkles in Akani Obio Uruan River, Nigeria. Science, 8(2), 45-55.

    2019

    1. Offiong, N. O., Inam, E. J., & Edet, J. (2019). Preliminary review of sources, fate, analytical challenges and regulatory status of emerging organic contaminants in aquatic environments in selected African countries. Chemistry Africa (Springer), https://doi.org/10.1007/s42250-019-00079-6
    2. Inam, E. J., Nwoke, I. B., Udosen, E. D., & Offiong, N. A. O. (2019). Ecological risks of phenolic endocrine disrupting compounds in an urban tropical river. Environmental Science and Pollution Research, 26(21), 21589-21597.
    3. Inam E., Nwoke I., Udosen E., & Offiong N., (2019). Ecological risks of phenolic endocrine disrupting compounds (EDCs) in urban tropical river. Environmental Science and Pollution Research (Springer nature), 26, 21589–21597
    4. Ehiwe O. I., Essiett A., Bede M. & Inam E. (2019). An assessment of radionuclide concentration and absorbed dose in rainwater from selected areas in Akwa Ibom State, Nigeria. Global Scientific Journal, 7 (6), 285-298
    5. Offiong, N O, Inam, E J, Etuk, H S and Essien, J P (2019) Current status and challenges of remediating petroleum derived PAHs in soils Nigeria as a case study for developing countries, Remediation Journal, in-print
    6. Essien, J. P., Inam, E., Ikpe, D. I., Udofia,G. E., & Benson, N. U. (2019). Ecotoxicological status and risk assessment of heavy metals in municipal solid wastes dumpsite impacted soil in Nigeria. Environmental Nanotechnology, Monitoring & Management, 11, 100215. https://doi.org/10.1016/j.enmm.2019.100215
    7. Benson, N. U., Adedapo, A. E., Fred-Ahmadu, O. H., Williams, A. B., Udosen, E. D., Ayejuyo, O. O., & Olajire, A. A. (2018). New ecological risk indices for evaluating heavy metals contamination in aquatic sediment: A case study of the Gulf of Guinea. Regional Studies in Marine Science, 18, 44-56.

    2018

    1. Inam, E., Etuk, I., Offiong, N. Kim, K.W., Kang, S. Y., Essien, J., (2018). Distribution and ecological risks of polycyclic aromatic hydrocarbons (PAHs) in sediments of different tropical water ecosystems in Niger Delta, Nigeria. Environmental Earth Sciences (Springer, Germany), 77(5), 216-229. DOI: https://doi.org/10.1007/s12665-018-7396-4
    2. Inam, E., Udo, O. O., Edet, J. B., Etim, U. J., Offiong, N. O. (2018). Adsorption of methylene blue from aqueous solution by humic acid extracted from freshwater river humus. Journal of Materials and Environmental Sciences (Morocco), 9(4), 1324-1334

    2017

    1. Inam, E., Innoh, G., Offiong, N. & Etim, B. B. (2017). Physicochemical characteristics and health risk assessment of drinking water sources in Okoroette community, Easter Coast of Nigeria. American Journal of Water Resources 5, 13-23

    2016

    1. Inam, E., Ibanga, F., Essien, J. (2016). Bioaccumulation and cancer risk of polycyclic aromatic hydrocarbons in leafy vegetables grown in soils within automobile repair complex and environ in Uyo, Nigeria. Environmental Monitoring and Assessment (Springer), 188 (12), 681-690 DOI: 10.1007/s10661-016-5695-3
    2. Inam, E, Etim, U. J., Akpabio, E.G., & Umoren, S.A. (2016), Process optimization for Plantain peels carbon application in dye abstraction, Journal of Taibah University for Science (Elsevier), 11, 173-185
    3. Inam, E., Offiong, N., Essien, J., Kang, S., Kang, S. Y & Antia, B. (2016). Polycyclic aromatic hydrocarbons load and potential risks in freshwater ecosystem of the Ikpa River Basin, Niger Delta, Nigeria. Environmental Monitoring and Assessment, (Springer) 188(1):49-64 DOI: 10.1007/s10661-015-5038-9

    2015

    1. Inam, E., Offiong, N., Kang, S., Yang, P., & Essien, J. (2015). Assessment of the occurrence and risks of emerging organic pollutants (EOPs) in Ikpa River Basin freshwater ecosystem, Niger Delta, Nigeria. Bulletin of Environmental Contamination and Toxicology, (Springer) 95(5), 624-631 DOI:10.1007/s000128-015-1639-9 (published online 04 September 2015)
    2. Essien, J., Inam, E., Abraham, N and Udofia, G. (2015). Enhanced biodegradation of PAHs using biosurfactant producing bacteria from a humic freshwater ecosystem of Eniong River, Itu – Nigeria. Journal of Global Ecology and Environment, 4(3):2454-2644
    3. Inam, E., Edet, J. B., & Offiong, N. (2015). Levels and occupational health risk assessment of trace metals in soils from automobile repair workshop village and environs in Uyo metropolis, Nigeria. African Journal of Environmental Science and Technology, 9(7): 584-591

    2014

    1. Israel A. U. & Inam, E. (2014). Removal of Zinc from Aqueous Solution by Adsorption using Coconut Choir Dust (Residue and Extract), Journal of Chemical Society of Nigeria, 39(1), 79-85
    2. Inam, Edu., Udoh, Inime I., Ite, Kufre E. & Inyang, Hilary (2014) Chemical and radiological health risks assessment of radionuclides in water sources in Akwa Ibom State, Nigeria, Proceedings of the IASTED (Canada) International Conference on Environment and Water Management (Africa EWRM 2014) September 1-3, 2014 Gaborone, Botswana, DO1:10.2316/P.2014.812-003, 6-13
    3. Inam, Edu., Owhoeke, Elechi & Essien, Joseph (2014). Human carcinogenic risk assessment of polyaromatic hydrocarbons in freshwater samples from Ogab/Egbema/Ndoni communities in Rivers State, Nigeria. Journal of Chemical Society of Nigeria, 39(2), 15-22
    4. Inam, E., Etim, U.J. & Offiong, N.O. (2014). Assessment of human health risk associated with the presence of trace metals in groundwater supplies in Akwa Ibom State, Nigeria. Nigeria. World Journal of Applied Science and Technology, (Nigeria)
    5. Bede, M.C., Essiett, A. A & Inam, E (2014). An Assessment of Absorbed dose and radiation hazard index from natural radioactivity in soils from Akwa Ibom State, Nigeria. International Journal of Science and Technology, UK, 4(3), 80-92
    6. Inam, E., Offiong, N. & Etim, U. (2014). Human health risk assessment of trace metals in some packaged water sold in Uyo, Akwa Ibom State, UNIUYO Journal of Gender Studies, 2: 96-104
    7. Inam, E., Etim, U., Akpabio, E., & Umoren, S (2014). Simultaneous adsorption of lead (II) and 3, 7-bis (Dimethylamino)-phenothiazin-5-ium chloride from aqueous solution by activated carbon prepared from plantain peels. Desalination and Water Treatment, 57(14):6540-6553 DOI: 10.1080//19443994.2015.1010236, 1-14