Historical Evolution of Sources and Pollution Levels of Heavy Metals in the Sediment of the Shuanglong Reservoir, China
Historical Evolution of Sources and Pollution Levels of Heavy Metals in the Sediment of the Shuanglong Reservoir, China
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中国双龙水库沉积物重金属来源及污染水平的历史演变
DOI：
10.3390/w12071855
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发表时间：
2020-06
期刊：
影响因子：
--
通讯作者：
Niu Xiaoyin
中科院分区：
文献类型：
--
作者：
Zhou Zike;Wang Yongping;Teng Haowei;Yang Hao;Liu Aiju;Li Menghong;Niu Xiaoyin
对双龙水库沉积物柱样中Cr、Ni、Cu、Zn、As、Hg、Pb 7种重金属元素及Pb同位素组成进行了研究。基于恒定供给率（CRS）模型，60 cm沉积物样品的年龄跨度确定为1944年至2015年。结合年代学和重金属含量分析，重金属来源和污染程度的演变呈现出由多个阶段组成的变化趋势。重金属的来源由1944-1964年的自然来源过渡到1965-2004年的工业来源。其后重金属含量下降，主要是由于二零零五年至二零一二年环保政策的大力推行。近年来（2013-2015年），由于人类活动频繁，重金属含量有所增加。主成分分析、相关性分析和变异系数分析表明，Cr、Ni、Cu、Zn和As主要来源于自然过程，Pb主要来源于汽车制造业，Hg主要来源于工业。地积累指数（IG）、单项污染指数（Pi）和单项潜在生态危害指数（Er）均表明，Hg和Pb处于轻度至中度污染状态。潜在生态风险指数（RI）、污染负荷指数（PLI）和内梅罗指数（PN）表明双龙水库处于低生态风险状态。
In this study, the concentrations of seven heavy metals (Cr, Ni, Cu, Zn, As, Hg, and Pb) and Pb isotope in a sediment core from the Shuanglong reservoir, Southwestern China, were investigated. Based on the constant rate of supply (CRS) model, the age span of a 60 cm sediment sample was determined to range from the years 1944 to 2015. Combined with chronology and heavy metal content, the evolution of the sources and pollution levels of heavy metals showed a changing trend composed of various stages. The sources of heavy metals transitioned from natural origins in 1944–1964 to industrial origins in 1965–2004. The subsequent reduction in heavy metal content was mainly due to the vigorous implementation of environmental protection policies from 2005 to 2012. In recent years (2013–2015), the heavy metal content has increased due to frequent human activity. Principal component analysis (PCA), correlation analysis, and the coefficient of variation (CV) analysis indicated that Cr, Ni, Cu, Zn, and As were derived from natural processes, Pb mainly came from automobile manufacturing, and Hg was mainly from industrial sources. The values of the geo-accumulation index (Ig), single pollution index (Pi), and single potential ecological risk index (Er) showed that the contamination of Hg and Pb was slight to moderate. Moreover, the values of the potential ecological risk index (RI), pollution load index (PLI), and Nemerow index (PN) indicated that the Shuanglong reservoir is under low ecological risk.
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DOI：
10.1016/j.chemgeo.2012.02.018
发表时间：
2013-01
期刊：
--
影响因子：
--
作者：
M. Mil-Homens;J. R. Blum;J. Canário;M. Caetano;A. M. Costa;S. Lebreiro;M. Trancoso;T. Richter
通讯作者：
M. Mil-Homens;J. R. Blum;J. Canário;M. Caetano;A. M. Costa;S. Lebreiro;M. Trancoso;T. Richter
影响因子：
5.8
作者：
M. Reddy;S. Basha;V. G. S. Kumar;H. V. Joshi;G. Ramachandraiah
通讯作者：
M. Reddy;S. Basha;V. G. S. Kumar;H. V. Joshi;G. Ramachandraiah
影响因子：
5.8
作者：
T. Nguyen;Weiguo Zhang;Zhen Li;Jie Li;Can Ge;Jinyan Liu;Xuexin Bai;H. Feng;Lizhong Yu
通讯作者：
T. Nguyen;Weiguo Zhang;Zhen Li;Jie Li;Can Ge;Jinyan Liu;Xuexin Bai;H. Feng;Lizhong Yu
影响因子：
13.6
作者：
Shengrui Wang;X. Jin;Qingyun Bu;Xiao-ning Zhou;Fengchang Wu
通讯作者：
Shengrui Wang;X. Jin;Qingyun Bu;Xiao-ning Zhou;Fengchang Wu
影响因子：
6.8
作者：
Bonotto, Daniel Marcos;Wijesiri, Buddhi;Goonetilleke, Ashantha
通讯作者：
Goonetilleke, Ashantha