Accumulation features of organochlorine pesticides and heavy metals in fish from high mountain lakes and Lhasa River in the Tibetan Plateau.
Accumulation features of organochlorine pesticides and heavy metals in fish from high mountain lakes and Lhasa River in the Tibetan Plateau.
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DOI：
10.1016/j.envint.2006.08.008
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发表时间：
2007-02
影响因子：
11.8
通讯作者：
Rui-qiang Yang;T. Yao;Baiqing Xu;G. Jiang;Xiaodong Xin
中科院分区：
文献类型：
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作者：
Rui-qiang Yang;T. Yao;Baiqing Xu;G. Jiang;Xiaodong Xin
分析了青藏高原偏远山区湖泊和拉萨河鱼类中有机氯农药和重金属的含量。肌肉中∑HCH、∑DDT和HCB的浓度范围分别为0.13-2.6 ng/g、0.78-23 ng/g和0.31-3.2 ng/g（以湿重计）。重金属在鱼类中的含量普遍不同。Cu和Zn含量相对较高，最高浓度分别达到2.0和6.9 μg/g。有机氯农药和重金属在不同组织器官中的积累差异较大。鳃似乎积累了更多的OCP，由于其更大的表面每组织的吸收。重金属含量在肝脏、卵和鳃中普遍较高，而在脑和肌肉中较低。研究结果表明，青藏高原是一个区域性的污染物辐合带，其作用机制是大气的长程输送和地形的冷捕获。
Organochlorine pesticides and heavy metals were analyzed in fish from remote mountain lakes and Lhasa River in Tibetan Plateau. Concentrations of ∑HCH, ∑DDT and HCB in fish muscles were in the range of 0.13–2.6 ng/g, 0.78–23 ng/g, 0.31–3.2 ng/g based on wet weight, respectively. Heavy metals were routinely found with different levels in fish. The Cu and Zn levels were relatively high with the maximum concentrations reaching 2.0 and 6.9 μg/g, respectively. Accumulation of OCPs and heavy metals are quite different in tissues and organs. Gill seems to accumulate more OCPs due to absorption by its larger surface per tissue. Heavy metal levels were generally high in liver, eggs and gill, and low in brain and muscle. Results from this study demonstrate that the Tibetan Plateau functions as a regional contaminant convergence zone by long-range atmospheric transport and orographic cold trapping.