Heavy metals in wetland soils along a wetland-forming chronosequence in the Yellow River Delta of China: Levels, sources and toxic risks
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- 作者：Guangliang Zhang1 ; Junhong Bai1 ; Baijh@126.com" class="auth_mail" title="E-mail the corresponding author ; Qingqing Zhao ; Qiongqiong Lu ; Jia Jia ; Xiaojun Wen
- 关键词：Heavy metals ; Enrichment factor (EF) ; Pollution levels ; Sediment quality guidelines (SQGs) ; Toxic units (TUs) ; Toxic risk index (TRI)
- 刊名：Ecological Indicators
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：69
- 期：Complete
- 页码：331-339
- 全文大小：1443 K
文摘
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A decreasing trend for Pb, Cu and Zn was found along the forming chronosequence.
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As and Cd exhibited significant enrichment among these heavy metals.
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Al, Cu, Pb and Zn had similar source and Cd, Cr and Ni might share another source.
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A new index is developed for the toxic risk assessment of metals in wetland soils.
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Cd exhibited higher contribution ratios based on TRI values compared with ΣTUs.