Comprehensive Evaluation of the Distribution, Transport and Ecological Risk of Heavy Metals in Intra-Urban River Sediments Using High-Resolution Techniques

作     者：Liao, Kang Li, Weijie Huang, Zhiwei Lin, Shu Fu, Lingfang Liu, Wei Fang, Huaiyang Deng, Hong 

作者机构：School of Environment and Energy Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Resource Recycling South China University of Technology Guangzhou510006 China The Key Laboratory of Water and Air Pollution Control of Guangdong Province State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control South China Institute of Environmental Sciences Ministry of Ecology and Environment of the People’s Republic of China Guangzhou510535 China 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Biochemistry 

摘      要：Determining the distribution trends, transport mechanisms, and ecological risks of heavy metals (HMs) in urban river sediments is essential for the government to conduct appropriate remediation work. In this study, we collected sedimentary columns from the Yayao Waterway in Foshan City, China. The vertical distribution profiles of dissolved and labile Fe, Mn, Cd, Zn, Cu, Cr, Ni, Pb, As, and Co in the sediments were obtained using the thin-film diffusive gradient (DGT) and high-resolution peeper (HR-Peeper) techniques. In addition, the transport rates, contamination levels, and ecological concerns of the HMs were evaluated using the European Community Bureau of Reference (BCR) sequential extraction technique, the DGT-induced sediment fluxes (DIFS) model, and multiple contamination evaluation metrics. The results showed that most of the DGT-labile HMs were associated with Fe/Mn (hydrogen) oxides, and Zn, Ni, and Cr had substantial negative connections with Fe/Mn (p © 2024, The Authors. All rights reserved.