The dissolved Pb, Cd, and Cu contents decreased up to 30%, 44%, and 26%, and the DGT-labile contents decreased up to 51%, 27%, and 33% compared with the contents in the non-dredged zone. April and July measurements showed that dredging was effectively remediate the polluted sediments. Dissolved metals and DGT-labile metals were quantified in the non-dredged and post-dredged sediments by high-resolution dialysis (HR-Peeper) and diffusive gradients (DGT) in thin films techniques. Here, we studied the efficacy of dredging engineering as a means to remove Cu, Cd, and Pb from polluted lake sediments, after six years of completion. However, the dredging efficacy remains hard to identify. 7 State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China Nanjing EasySensor Environmental Technology Co., Ltd, Nanjing 210018, China.ĭredging is used worldwide to remove polluted sediments from water bodies.6 Shanghai Waterway Engineering Design and Consulting Co., Ltd., Shanghai 200120, China.5 Shanghai Water Source Construction Development Co., Ltd., Shanghai 200437, China. 4 Nanjing University of Science and Technology, 200 Xiaolingwei Road, 210094 Nanjing, China.Electronic address: 3 State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China University of Chinese Academy of Sciences, Beijing 100049, China.
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