Accumulation of Trace Metals by Mangrove Plants in Indian Sundarban Wetland: Prospects for Phytoremediation |
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| Authors: | Ranju Chowdhury Paulo JC Favas J Pratas M P Jonathan P Sankar Ganesh Santosh Kumar Sarkar |
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| Institution: | 1. Department of Marine Science, University of Calcutta, Ballygunge Circular Road, Calcutta, West Bengal, India;2. Department of Geology, School of Life Sciences and the Environment, University of Trás-os-Montes e Alto Douro, UTAD, Quinta de Prados Vila Real, Portugal;3. IMAR-CMA Marine and Environmental Research Centre / MARE – Marine and Environmental Sciences Centre, Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal;4. IMAR-CMA Marine and Environmental Research Centre / MARE – Marine and Environmental Sciences Centre, Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal;5. Department of Earth Sciences, Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal;6. Centro Interdisciplinario de Investigaciones Estudios sobre Medio, Ambiente Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle de Junio de Barrio la Laguna Ticomán C.P., Del. Gustavo A. Madero, México, D.F., MEXICO;7. Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Hyderabad, Telengana, India |
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| Abstract: | The work investigates on the potential of ten mangrove species for absorption, accumulation and partitioning of trace metal(loid)s in individual plant tissues (leaves, bark and root/pneumatophore) at two study sites of Indian Sundarban Wetland. The metal(loid) concentration in host sediments and their geochemical characteristics were also considered. Mangrove sediments showed unique potential in many- fold increase for most metal(loid)s than plant tissues due to their inherent physicochemical properties. The ranges of concentration of trace metal(loid)s for As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb and Zn in plant tissue were 0.006–0.31, 0.02–2.97, 0.10–4.80, 0.13–6.49, 4.46–48.30, 9.2–938.1, 0.02–0.13, 9.8–1726, 11–5.41, 0.04–7.64, 3.81–52.20 μg g ?1respectively. The bio- concentration factor (BCF) showed its maximum value (15.5) in Excoecaria agallocha for Cd, suggesting that it can be considered as a high-efficient plant for heavy metal bioaccumulation. Among all metals, Cd and Zn were highly bioaccumulated in E. agallocha (2.97 and 52.2 μg g ?1 respectively. Our findings suggest that the species may be classified as efficient metal trap for Cd in aerial parts, as indicated by higher metal accumulation in the leaves combined with BCF and translocation factor (TF) values. |
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| Keywords: | geochemical characteristics Excoecaria agallocha bioaccumulation |
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