【摘要】 为了解珠江河口水体中As的分布,2006年在虎门、蕉门、洪奇沥、横门、磨刀门、鸡啼门、虎跳门和崖门8大出海口进行水体监测。结果表明:八大口门水体中As含量均没超过地表水一类水质标准,As平均含量为0.0018 mg/L,最大值为0.0059 mg/L,最小值为0.0002 mg/L。从珠江河口空间动态看,As平均含量:虎门﹥蕉门﹥横门﹥磨刀门=洪奇沥门﹥虎跳门﹥鸡啼门﹥崖门;从季节上看:5月>8月>2月>11月,丰水期大于枯水期。单因子评价指数法结果表明,珠江河口污染指数均小于1,As在珠江口对污染贡献较少。更多还原

【Abstract】 An investigation on concentration and distribution of As in the water at eight different main estuaries,i.e.Humen,Jiaomen,Hong qilimen,Hengmen,Mo daomen,Ji timen,Hu tiaomen and Yamen of Pearl River Estuary in February,May,August and November 2006 was carried out.The result showed that there were no excessive levels to achieve the level one standard of surface water quality of As.The concentration of As was in the range of 0.0002 mg/L to 0.0059 mg/L.The average content was 0.0018 mg/L.The characteristics of spatia1 distribution of As concentrations in the water samples were found to decline in the following order:Humen> Jiaomen>Hengmen>Mo daomen and Hong qilimen>Hu tiaomen>Ji timen>Yamen.The concentration of As in the rainy season generally was greater than the dry season.The pollution index of As was less than 1,implicating the pollution degree was not high.更多还原