韶关北江河水质重金属污染调查与评价

Heavy Metal Pollution Survey and Evaluation of Beijiang River in Shaoguan

为查明北江河水质重金属污染情况,采用原子吸收分光光度法检测了17个水样的Hg、As、Cr、Cu、Pb 5种重金属的含量,并采用单因子污染指数法和内梅罗污染指数法对重金属污染程度进行评价。结果表明,北江河水中的Hg、As、Cr、Cu、Pb 5种重金属的含量范围分别为0.000 4-0.001 7、0.011-0.029、〈0.004、0.000 13-0.000 14、0.000 13-0.002 00 mg/L。根据单因子污染指数法,河水中只有Hg的单因子指数〉1.0,其余4种重金属〈0.1;根据内梅罗污染指数法,河水中Hg的内梅罗污染指数为27.62,属于严重污染。因此,北江河水中重金属的污染需要引起有关部门重视。

To find out heavy metals pollution of Beijiang river,using atomic absorption spectrophotometry to analyze heavy metal content of Hg,As,Cr,Cu,Pb in 17 samples,and single factor pollution index method and Nemerow pollution index method were used to evaluate heavy metal pollution. The results showed that content range of Hg,As,Cr,Cu,Pb is 0. 000 4-0. 001 7,0. 011-0. 029, 0. 004,0. 000 13-0. 000 14 and 0. 000 13-0. 002 00 mg / L respectively. According to the single factor pollution index and Nemerow pollution index that Hg has serious pollution in river. So,the pollution of heavy metals in the Beijiang river water need to the attention of the authorities.