Abstract
This study reports the measurement of stability constants for the interaction of As (V and III) and Sb (V and III) with humic substances extracted from aquatic sediments of the Sundarban mangrove forest ecosystem. It was observed that As and Sb formed a slightly more stable association with fulvic acid (FA) than with its humic acid (HA) counterpart. Quenching of fluorescence at increasing As (III and V) or Sb (III and V): FA or HA ratios was obtained that ideally correspond to a 1:1 complexation model. Quite strong complexation of As and Sb by FA and HA occurs at neutral pH, indicating that HA and FA probably markedly affect the mobility of As and Sb in the mangrove environment.
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Acknowledgments
The authors are indebted to Dr. Nikhil Guchait, Dept. of Chemistry, Calcutta University, for encouragement of the use of synchronous fluoroscence spectrometry in this research. The first author is also indebted to the Teacher-in-charge, Sundarban Hazi Dasarat College, Pathankhali, West Bengal, India for allowing him to complete the study for Ph D thesis submitted to Calcutta University. We gratefully acknowledge financial assistance (2009–2012) from the UGC, New Delhi.
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Mandal, S.K., Ray, R., Chowdhury, C. et al. Implication of Organic Matter on Arsenic and Antimony Sequestration in Sediment: Evidence from Sundarban Mangrove Forest, India. Bull Environ Contam Toxicol 90, 451–455 (2013). https://doi.org/10.1007/s00128-012-0934-y
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DOI: https://doi.org/10.1007/s00128-012-0934-y