中国水体环境中多氯联苯的存在水平研究

从自然水体、水体沉积物及水生生物3个层次,系统分析多氯联苯在中国部分水体环境中的污染水平及其可能的致污原因。其结果表明:中国的大部分水体直接含有多氯联苯的量符合相应的环境质量标准,对饮水安全不构成直接威胁;沉积物中存在的多氯联苯大多源于航海运输事业的污染物排放,有关部门应采取相应的管理措施对运输船只的排污进行限制;水生生物中多氯联苯的含量在香港和珠江口出现超标现象,应引起人们的注意,积极改善该地区的水产养殖环境。

Analysis on the Existence Level of Polychlorinated Biphenyl in Water Environment in China

From three levels of natural water,water sediments and aquatic organisms,the pollution level of polychlorinated biphenyls(PCBs) in water environment in China and its potential causes were systematically analyzed.The results showed that most of the natural water in China was in accord with the environmental quality standards and suitable for drinking.The main causes that PCBs in sediments were beyond standards were the emission of pollutants from maritime transport,so the governmental departments concerned should take corresponding measures to control the pollutant emissions of transport vessels.The contents of aquatic organisms in Hong Kong and Pearl River estuary were beyond the standard,so this phenomenon should draw people's attention to the improvement of aquaculture environment in these regions.