中国南方红树林湿地附近水产养殖池塘沉积物和底栖动物中的痕量金属。
Trace metals in sediments and benthic animals from aquaculture ponds near a mangrove wetland in Southern China.
机构信息
Food Inspection and Quarantine Technology Center, Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen 518016, China; Shenzhen Key Laboratory for Coastal Dynamics and Environment, Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
School of Earth Sciences, China University of Geosciences, Wuhan 430074, China.
出版信息
Mar Pollut Bull. 2017 Apr 15;117(1-2):486-491. doi: 10.1016/j.marpolbul.2017.01.026. Epub 2017 Jan 19.
In this study, we measured the concentrations of trace metals (Cr, Cu, Zn, As, Cd, Pb and Hg) in typical cultured animals (crabs, clams, and shrimps) and sediments from aquaculture ponds nearby mangrove wetlands in Zhangjiang estuary, China. The contents of Cr, Cu, Cd, and Pb in mangrove sediments were significantly higher than those in pond sediments, while an inverse distribution was observed for Zn, As, and Hg. Significantly higher concentrations of trace metals were found in clams from the mangrove mudflats compared to those from the aquaculture ponds. The sources of trace metals in the clams were primarily from organic fertilizer, whereas those in the shrimp were from contaminated sediment. The results of geo-accumulation index and the ecological risk assessment indicated that the aquaculture ponds near the mangrove wetlands in this subtropical estuary posed a special risk of endogenous and exogenous trace metal pollution to nearby systems.
在这项研究中，我们测量了中国漳江口红树林湿地附近水产养殖池塘中典型养殖动物（蟹、蛤和虾）和沉积物中痕量金属（Cr、Cu、Zn、As、Cd、Pb 和 Hg）的浓度。红树林沉积物中 Cr、Cu、Cd 和 Pb 的含量明显高于池塘沉积物，而 Zn、As 和 Hg 的分布则相反。与来自水产养殖池塘的蛤相比，来自红树林泥滩的蛤中痕量金属的浓度明显更高。蛤中痕量金属的来源主要是有机肥料，而虾中的痕量金属则来自受污染的沉积物。基于地质累积指数和生态风险评估的结果表明，该亚热带河口的红树林湿地附近的水产养殖池塘对附近系统的内源性和外源性痕量金属污染构成了特殊风险。
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