Spatial and seasonal variations and risk assessment for heavy metals in surface sediments of the largest river-embedded reservoir in China
Spatial and seasonal variations and risk assessment for heavy metals in surface sediments of the largest river-embedded reservoir in China
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我国最大河流嵌入式水库表层沉积物重金属时空变化及风险评估
DOI：
10.1007/s11356-020-09868-w
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发表时间：
2020-06
影响因子：
5.8
通讯作者：
Wang Xianyun
中科院分区：
文献类型：
--
作者：
Yuan Peng;Wu Xuefei;Xia Yuqi;Peng Cheng;Tong Hong;Liu Jianshe;Jiang Lei;Wang Xianyun
沉积物不仅是水环境中重金属的汇，而且是水环境中重金属的来源，可能造成饮用水水库的内源性污染。在这项工作中，我们收集了中国最大的河流嵌入式水库青草沙水库的表层沉积物，并调查了四个季节重金属的空间分布、风险和来源。表层沉积物中五种重金属（Cr、Cu、Mn、Zn、Ni）的分布存在显着的空间和季节异质性。在水库下游沉积物中检测到的五种金属浓度最高，特别是在夏季和明年春季。地积累指数（Igeo）和富集因子（EF）表明，夏季单一金属对沉积物的污染较其他季节重。另外，内梅罗污染指数（PIN）显示，五种金属引起的协同污染在夏季最严重，其次是明年春季。但潜在生态风险指数（PERI）表明，这些金属在四个季节均未造成潜在生态风险。综合分析表明，沉积物污染从秋季到冬季、次年春季逐渐加重。主成分分析表明，5种重金属的主要污染源可能来自工业废水和生活污水，几乎不受季节影响。该工作可为后续饮用水水质季节优化和水库管理提供数据支撑。
The sediment acts as not only sink but also source of heavy metals in aquatic environment, which may cause the endogenous pollution in drinking water reservoirs. In this work, we collected the surface sediments from Qingcaosha Reservoir, the largest river-embedded reservoir in China, and investigated the spatial distribution, risk, and sources of heavy metals in four seasons. Significant spatial and seasonal heterogeneity could be found in the distribution of five heavy metals (Cr, Cu, Mn, Zn, and Ni) in the surface sediments. The highest concentrations of the five metals were detected in the sediments from the reservoir downstream, especially in summer and next spring. The geo-accumulation index (Igeo) and enrichment factor (EF) suggest that the sediment pollution caused by single metal was heavier in summer than in other seasons. Also, the Nemerow pollution index (PIN) manifests that the synergetic pollution induced by five metals was most serious in summer, followed by next spring. However, the potential ecological risk index (PERI) indicates that none of these metals caused potential ecological risk in four seasons. Comprehensive analysis demonstrates that the sediment pollution gradually increased from autumn to winter and then to next spring. Principal component analysis shows that the main pollution source of five heavy metals may come from industrial wastewater and domestic sewage, which was almost independent of seasons. This work can provide data support for the subsequent seasonal optimization of drinking water quality and reservoir management.
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DOI：
10.1201/b10345-5
发表时间：
2010-11
期刊：
Encyclopedia of Autism Spectrum Disorders
影响因子：
--
作者：
Kim-Anh Lê Cao;Z. Welham
通讯作者：
Kim-Anh Lê Cao;Z. Welham
DOI：
10.1007/s00254-007-0638-5
发表时间：
2007-01
期刊：
Environmental Geology
影响因子：
--
作者：
Qing-yun Fan;Jiang He;Hongxi Xue;Changwei Lü;Ying Liang;Saruli;Ying Sun;Lili Shen
通讯作者：
Qing-yun Fan;Jiang He;Hongxi Xue;Changwei Lü;Ying Liang;Saruli;Ying Sun;Lili Shen
影响因子：
9.8
作者：
H. Hintelmann;R. Wilken
通讯作者：
H. Hintelmann;R. Wilken
影响因子：
6.8
作者：
Bonsignore, Maria;Manta, Daniela Salvagio;Sprovieri, Mario
通讯作者：
Sprovieri, Mario
影响因子：
2.8
作者：
H. Bing;Yanhong Wu;W. Nahm;E. Liu
通讯作者：
H. Bing;Yanhong Wu;W. Nahm;E. Liu