标题：Potentially toxic elements in sediments of China’s Shihe River:Urban-agricultural impact assessment and source apportionment

作者：Kai Zhang, Ge Ma, Zheng Chen, Jilu Wang, Xiaomeng Lou, Yinan Yang, Jiaojiao Feng, Fengxia Yang, Kuangjia Li, Chenxuan Shang, Rui Xin, Xiangmin Zhang

来源出版物：Journal of Contaminant Hydrology

DOI：10.1016/j.jconhyd.2025.104625

出版年：2025

文献类型：Article

语种：英文

摘要：This study investigated the pollution status of seven potentially toxic elements (PTEs) by analyzing eighteen sediment samples collected from urban and agricultural zones along an urban river in Xinyang, a major agrarian city. Results revealed that manganese (Mn), zinc (Zn), and chromium (Cr) exhibited the highest concentrations. Almost all PTEs exceeded regional background values, indicating anthropogenic contamination in the riverine system. Spatial analysis demonstrated 1.2- to 3.5-fold higher PTE concentrations in urban areas compared to agricultural zones, underscoring the predominant role of urban activities in pollution dynamics. Sequential extraction analysis identified residual fractions as the dominant phase for most PTEs, suggesting limited environmental mobility. However, Mn and cadmium (Cd) displayed elevated bioavailability through their association with non-residual fractions. The results of ecotoxicological risk methods classified Mn and Cd as priority pollutants, with urban hotspots reaching moderately to heavily contaminated status. The PCA-MLR analysis results demonstrated that sewage discharge and traffic-related sources are the primary anthropogenic contributors to PTEs contamination in the Shihe River. These findings advocating for targeted urban watershed management strategies to mitigate PTE risks in rapidly developing regions.

关键词：Potentially toxic elements,River sediment,Anthropogenic contamination,Urban pollution,Source apportionment

影响因子：4.4

论文链接：https://doi.org/10.1016/j.jconhyd.2025.104625

（地理科学学院 程建双/撰稿 崔向超/初审 闫军辉/复审 韩勇/终审）