赵汉取,韦肖杭,王俊,张敏,施沁璇,姚伟忠,沈萍萍,崔雁娜

• 1:农业部淡水渔业健康养殖重点实验室浙江省淡水水产研究所

摘要(Abstract)：

按照渔业生态环境监测规范,于2012—2013年在浙江省湖州市、嘉兴市所属10个不同县(区、市)较大规模的养殖场进行随机采样,采用微波消解-原子吸收、原子荧光法测定了107个池塘表层沉积物中7种重金属的质量比。结果表明,Zn的绝对质量比最高,两地市分别为221.29 mg/kg和188.63 mg/kg。以全国土壤背景值为标准,两地市养殖池塘表层沉积物中各重金属内梅罗综合污染指数情况相似,没有显著性差异(p>0.05),其中Cu、Zn、Cd污染指数较高,Cr和As处于尚清洁水平,嘉兴市的Cu内梅罗指数达到9.14。两地市主要养殖池塘表层沉积物中Cd污染最严重,处于中等生态危害等级,其他6种重金属的潜在生态危害较轻微,危害从强到弱为Cd、Hg、Pb、Cu、As、Zn、Cr。各县(区、市)综合潜在生态风险指数都处于轻微危害状态,以南湖区最高(115.84),海盐县最低(76.14)。鱼类养殖池塘表层沉积物中重金属的潜在生态危害程度要大于虾、蟹、鳖类,主要是由于鱼类养殖池塘表层沉积物中Cd的潜在生态风险系数较高;不同养殖品种间池塘表层沉积物重金属的潜在生态风险指数差异不明显(p>0.05)。

关键词(KeyWords)： 水产养殖学;生态风险评价;池塘;表层沉积物;重金属;浙北地区

Abstract:

Keywords:

基金项目(Foundation): 湖州市科技计划项目(2013GY04);; 浙江省科技计划项目(2011C23062)

作者(Author): 赵汉取,韦肖杭,王俊,张敏,施沁璇,姚伟忠,沈萍萍,崔雁娜

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