Abstract
To explore the effects of herbaceous plants on mercury (Hg) behaviors after flooding in the water-level fluctuation zone (WLFZ) of Jialing River, three typical local plants (D. pyramidalis, A. philoxeroides and C. dactylon) and their in-situ sediments were collected for flooding experiments to study the Hg dynamics of water and sediment in different treatments. The results showed that flooding increased sediment MeHg concentrations and flooded plants (especially for the D. pyramidalis) promoted this process. Similarly, the highest dissolved MeHg level and proportion of MeHg to total Hg (%MeHg) were observed in plant-water treatments in the presence of D. pyramidalis, indicating the potential for the methylation of Hg in the water body influenced by the decay process of herbaceous plants. These results suggest that the herbaceous plant D. pyramidalis contributes more to Hg methylation and release in the WLFZ of the Jialing River than other plants studied.
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Acknowledgements
This study was supported by the Chongqing Natural Science Foundation (cstc2021jcyj-msxmX1065) and the Ph.D. Programs Foundation of Chongqing Industry Polytechnic College (2022GZYBSZK3-16).
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Liang, L., Wang, D. Effects of Herbaceous Plants on Methylmercury Net Production and Release From Sediment After Flooding in the Water-Level Fluctuation Zone of the Jialing River. Bull Environ Contam Toxicol 109, 735–740 (2022). https://doi.org/10.1007/s00128-022-03591-7
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DOI: https://doi.org/10.1007/s00128-022-03591-7