广州市南沙区榄核河沉积物中重金属污染特征研究

Research on pollution characteristics of heavy metals in river sediment of Lanhe river, Nansha district,Guangzhou city

对广州市南沙区榄核河沉积物中5 种典型重金属（Cu、Zn、Pb、Ni 和Cr）的含量水平进行分析,并在此基础上对各元素进行相关性分析和地累积指数评价.结果表明,榄核河沉积物重金属污染严重,5 种金属元素的浓度和介于3710.38-11143.02mg/kg 之间, 各金属浓度高到低为Zn、Cu、Ni、Cr、Pb;Cu、Ni 和Cr 它们3 者之间两两相关性显著, 表明这3 种金属元素来源相同或相近;5 种重金属元素的富集程度由高到低为Cu、Ni、Zn、Pb、Cr,沉积物总体呈现出以Cu 为主的多种重金属复合污染特征.

The contents of heavy metals Cu, Zn, Pb, Ni and Cr in sediment of Lanhe River were measured. On the basis, the correlating analyse and the indexes of geography accumulation of five heavy metal elements were analyzed. The results indicated that the sediment of Lanhe River had been seriously polluted by heavy metals. The total amount of five heavy metal elements reached 3 710.38~11 143.02 mg/kg and it showed the order of Zn, Cu, Ni, Cr, Pb. Correlation analysis among Cu, Ni and Cr showed the significant relation to each other, so these three heavy metal elements had a greater possibility to have come from the same source. The order of the enrichment degree of five heavy metals was Cu, Ni, Zn, Pb, Cr. The pollution characteristic of multi-metals in research region was mainly related to Cu.