Bioavailability, (im)mobilization kinetics, and spatiotemporal patterns of arsenic and cadmium in surficial sediments of a river–estuary–coast system

Feng Pan,Bo Wang, Yilin Zhang,Xiaoting Zhang,Yu Cai,Huatai Liu,Zhanrong Guo,Xinhong Wang

Journal of Hydrology（2022）

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摘要

•High-resolution distributions of DGT-labile As, Cd, Fe, Mn and S are determined.•Fe cycling dominates As mobility, while aerobic OM oxidation controls Cd mobility.•Terrigenous input and redox condition trigger the contrasting seasonal availability of As and Cd.•Cd bioavailability evaluated by DGT clearly increases with salinity gradient.

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关键词

Arsenic,Cadmium,Sediment–water interface,Redox geochemistry,Salinity,Resupply kinetics

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