飞云江入海口表层沉积物中重金属污染及潜在生态危害评价

发布时间：2018-01-31 04:14

本文关键词： 飞云江入海口重金属表层沉积物生态危害　出处：《浙江农业学报》2017年10期 　论文类型：期刊论文

【摘要】：于2016年8月采集飞云江入海口瑞安和平阳区域14个站点的表层沉积物,运用无火焰和火焰原子吸收分光法测定2个区域表层沉积物中的重金属含量,并采用Hakanson潜在生态危害指数法对重金属的生态危害进行评价。结果表明,这2个区域各个站位点的重金属污染状况具有一定的相似性:Cu、Zn和Cr的平均单因子污染指数均大于1,属于中等污染程度;瑞安和平阳的平均综合污染指数分别为5.34、5.87,属于低污染程度。平阳的生态风险指数(21.03)大于瑞安(18.37),但指数值都小于150,属于低生态危害程度。在空间分布上,受飞云江和鳌江支流和沿岸流影响,平阳区域污染要大于瑞安区域。
[Abstract]:In August 2016, the surface sediments from 14 stations in Ruian and Pingyang at the mouth of Feiyun River were collected, and the heavy metal contents in surface sediments of two regions were determined by flame free and flame atomic absorption spectrophotometry. The Hakanson potential ecological hazard index method was used to evaluate the ecological damage of heavy metals. The results showed that the pollution status of heavy metals at different stations in these two regions had certain similarity. The average single factor pollution index of Zn and Cr is more than 1, which belongs to moderate pollution degree. The average comprehensive pollution index of Ryan and Pingyang is 5.34 ~ 5.87, which belongs to the low pollution degree, and the ecological risk index of Pingyang is higher than that of Ruian (18.37). But the index value is less than 150, which belongs to the low ecological hazard degree. In the spatial distribution, the pollution in Pingyang area is larger than that in Ryan area under the influence of the tributaries of Feiyun River and Aojiang River and the coastal current.
【作者单位】：浙江省海洋水产养殖研究所浙江省近岸水域生物资源开发与保护重点实验室;
【基金】：浙江省科技厅项目(2015F30021,2016C37071,2016F50032) 2016年度温州市重点渔业水域环境监测(DHCG20160307)
【分类号】：X55;X826
【正文快照】： 飞云江流域位于浙江省南部,为浙江省八大独流入海水系之一。它发源于浙江省景宁和泰顺两县交界处的洞宫山白云尖北麓干流,全长203 km,流域面积3 778 km2,是浙江省第四大河,温州市第二大河。河口长约15 km,水流由西向东,单独流入东海,属于山溪性强潮河流。其径流携带着上游各县

【相似文献】