Seasonal variations of cadmium (Cd) speciation and mobility in sediments from the Xizhi River basin, South China, based on passive sampling techniques and a thermodynamic chemical equilibrium model

• Published in: Water research (Oxford) Vol. 207; p. 117751
• Main Authors: Gao, Lei, Li, Rui, Liang, Zuobing, Hou, Lei, Chen, Jianyao
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.12.2021
• Subjects: Cadmium - analysis; China; Diffusive flux; Ecosystem; Environmental Monitoring; Geologic Sediments; Mobilization mechanisms; Renal Dialysis; Seasons; Sediment-water interface; Speciation modeling; Sulfide oxidation; Thermodynamics; Water Pollutants, Chemical - analysis; China; Diffusive flux; Speciation modeling; Sediment-water interface; Mobilization mechanisms; Sulfide oxidation

·Sulfates reduction enabled Cd concentrations to remain at µg·L−1 levels in pore water.·Sulfides oxidation mainly accounted for remobilization of sediment Cd.·Sediment acted as a sink of Cd to water in winter and shifted to a source in summer.·Sediment Cd was released into river and migrated downstr...