文献类型：期刊文献

英文题名：Effect of overlying water pH, temperature, and hydraulic disturbance on heavy metal and nutrient release from drinking water reservoir sediments

作者：Peng, Cheng[1,2,3,4];Huang, Yunying[3];Yan, Xuchen[3];Jiang, Lei[2];Wu, Xuefei[2];Zhang, Wei[1];Wang, Xianyun[2]

机构：[1]East China Univ Sci & Technol, Sch Resource & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Urban Water Resources Co Ltd, Shanghai Natl Engn Res Ctr, Shanghai 200082, Peoples R China;[3]Donghua Univ, Coll Environm Sci & Engn, Shanghai, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai, Peoples R China

年份：2021

卷号：93

期号：10

起止页码：2135

外文期刊名：WATER ENVIRONMENT RESEARCH

收录：;EI(收录号：20212310479250);WOS:【SCI-EXPANDED(收录号:WOS:000658283200001)】；

基金：National Key Research and Development Program of China, Grant/Award Number: 2018YFC1800600 and 2019YFC1805200; Shanghai Yangpu District Postdoctoral Innovation Practice Base Research Project; National Natural Science Foundation of China, Grant/Award Number: 41807461

语种：英文

外文关键词：drinking water reservoir; heavy metals; hydraulic disturbance; nutrients; sediment

摘要：How environmental factors impact the release of pollutants from sediment is critical to ensure the safety of drinking water, especially when the seasons change. Here, we investigated the effect of water pH, temperature, and hydraulic disturbance on the release of heavy metals and nutrients from the sediment of drinking water reservoir. The results show that lower initial water pH promoted the Zn release, while low temperature enhanced the Mn flux after 15 days. Meanwhile, continuous disturbance caused more metals releasing from sediment than intermittent disturbance due to greater shear stress and turbulence effect. However, intermittent high-speed disturbance greatly altered the dynamic release of Zn from L-shaped curve to U-shape in water column. Moreover, lower water pH caused higher ammonium in water but lower nitrate since H+ restrained the nitrification. Yet, higher temperature inhibited the release of ammonium from sediment, which might relate to the accelerated mineralization of organic nitrogen and elevated dissolved oxygen caused by the algae growth. Notably, hydraulic disturbance with various intensity and duration greatly influenced the fluxes of various species of nitrogen and soluble phosphate in water column, because the disturbance facilitated the nitrogen and phosphorus exchanges between sediment-water and water-air interfaces. Practitioner points Lower water pH induced Zn release, while low temperature gradually enhanced Mn level. More metals were released from sediment under continuous disturbance than intermittent disturbance. Lower water pH caused higher ammonium nitrogen in water but lower nitrate nitrogen. Higher temperature inhibited the release of ammonium nitrogen from sediment. Hydraulic disturbance greatly changed the release of different species of nitrogen and soluble phosphate from sediment.