4.2 Article

Characterizing the Changes in the Source Apportionment of Metal in Surface Waters by an Integrated Approach

期刊

ACS ES&T WATER
卷 -, 期 -, 页码 -

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsestwater.2c00399

关键词

positive matrix factorization; trace metals; source apportionment; self-organizing map; health risk assessment

向作者/读者索取更多资源

This study evaluated the temporal, spatial, and source changes of seven trace metals based on long-term monitoring data from 1999 to 2016. The results showed decreasing concentrations of Al, Cd, Mn, Ni, and Zn. Pollution levels were higher in the midstream compared to the upstream and downstream. Anthropogenic pollution sources, especially historical mining, industrial, agricultural, and geological natural sources, were the main contributors to the contamination.
Based on long-term monitoring data of typical surface water from 1999 to 2016, this study evaluated the temporal, spatial, and source changes of seven trace metals. The results show that average concentrations of trace metals were Zn (248.61 mu g L-1) >> Mn (74.27 mu g L-1) > Ba (72.4 6 mu g L-1) > Al (44.11 mu g L-1) > As (6.36 mu g L-1) > Ni (3.29 mu g L-1) > Cd (2.98 mu g L-1). There is a decreasing trend in the concentrations of Al, Cd, Mn, Ni, and Zn. Pollution levels in the midstream are relatively higher than in the upstream and downstream. A wavelet analysis suggested that the Al and As contamination levels exhibited clear periodic oscillations. According to the source apportionment analysis, the pollution sources of A, B, and C periods were determined, among which historical mining, industrial, agricultural, and geological natural sources were the main contributors. Anthropogenic pollution sources during stage B accounted for the largest proportion, reaching 76.54%. Historical mining source emissions remained relatively stable (43.17, 34.99, and 40.83%), but the proportion remained at the highest level. The health risk assessment shows that there is no obvious health risk, and As and Cd have certain cancer risk.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.2
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据