The influence of physicochemical parameters on bioavailability and bioaccessibility of heavy metals in sediments of the intertidal zone of Asaluyeh region,Persian Gulf,Iran |
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| Affiliation: | 1. Spectrometry, Sample Preparation and Mechanization Group – GEPAM, Institute of Chemistry, University of Campinas – Unicamp, P.O. Box 6154, 13083-970, Campinas, SP, Brazil;2. National Institute of Science and Technology for Bioanalytics, Institute of Chemistry, University of Campinas – Unicamp, P.O. Box 6154, 13083-970, Campinas, SP, Brazil;1. Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, 510275, China;2. Department of Oncology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, 150001, China;3. Department of Health Policy and Management, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China;4. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China;5. School of Environment, Harbin Institute of Technology, Harbin, 150090, China;1. Protein Chemistry and Technology Department, CSIR-Central Food Technological Research Institute, Mysuru, India;2. Department of Food Science and Technology, Sambalpur University, Sambalpur, Odisha, India;1. Department of Analytical Chemistry and Organic Chemistry, Universitat Rovira i Virgili, Tarragona, Catalonia, Spain;2. Division of Aquaculture and Upgrading (DivAV), Portuguese Institute for the Sea and Atmosphere (IPMA, I.P), Lisbon, Portugal;3. Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Reus, Catalonia, Spain |
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| Abstract: | In this research, we have worked on the evaluation of heavy metal contamination in the sediments taken from the intertidal zone of Asaluyeh region using Modified Community Bureau of Reference sequential extraction method (mBCR), the simplified bioaccessibility extraction test (SBET), and calculated enrichment factor (EF). Also, potential influencing factors including sediment characteristics that may affect the heavy metals bioavailability and bioaccessibility were investigated. mBCR extraction analysis indicated that among the metals, Mn, Zn, V, Cu, and Cd exhibit relatively higher mobility, while Ti, Pb, Cr, and Ni occur mainly in the residual fractions. Based on the mean values, the bioaccessibility of metals decreased in the order: Mn (50.01%)>Cd (46.26%)>Zn (14.61%)>V (13.97%)>Pb (10.88%)>Ni (9.2%)>Ti (8.43%)>Cr (6.66%)>Cu (6.23%). The obtained results from the principal component analysis (PCA), EF and mBCR extraction showed that most anthropogenic-derived metals with higher solubility are more bioaccessible compared to those of natural origin. Multiple linear regression analysis demonstrated that the main physicochemical variables of the sediment influencing the bioaccessibility of metals include cation exchange capacity (CEC), pH, and particle size fraction. |
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| Keywords: | Heavy metal Sediment Bioaccessibility Bioavailability Intertidal zone of Asaluyeh |
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