期刊
MARINE POLLUTION BULLETIN
卷 175, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2021.113163
关键词
Trace metal; Core sediments; Risk assessment; Organic matter; Mangrove ecosystem
资金
- University Grants Commission [RGNF-2015-17-SC-KER-21330, MANF-2015-17-KER-50363]
The distribution and ecological risk of trace metals were studied in an urbanized mangrove ecosystem in India. The results showed that Cd, Pb, and Zn were enriched in the upper sediments, while Cd, Ni, and Zn were present in exchangeable forms. The study area had moderate to strong pollution of Cd and Zn, while other metals were unpolluted to moderately polluted.
Distribution and ecological risk assessment of trace metals were carried out in the core sediments of a highly urbanized tropical mangrove ecosystem along the Southwest coast of India. The metal distribution pattern was as follows: Co, Cu, Ni and Pb adsorbed onto Fe oxyhydroxides and fine grained sediments; Cd and Zn preferential adsorption by organic matter and Cr scavenging by Mn oxyhydroxides. Cd, Pb and Zn were significantly enriched in upper sediments, while Cd, Ni and Zn were present in metal exchangeable fractions. Geoaccumulation index (Igeo) suggested that the study area showed moderate to strong pollution of Cd and Zn, whereas unpolluted to moderately polluted with respect to Co, Cr, Cu, Mn, Ni and Pb. Cd enrichment caused high ecological risk, primarily attributed to anthropogenic activities. Mangrove ecosystems are efficient sequester of trace metals but anthropogenic addition can cause significant fraction of exchangeable metals and pose high ecological 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。
推荐
暂无数据