徐州市北郊工业区河流底泥重金属污染特征

Study on Contanination Feature of Heavy Metals in Bottom Sediments of River in Northern Industrial District of Xuzhou City

对徐州市北郊工业区主要纳污河流,京杭大运河徐州段及其支流荆马河底泥中的多种重金属含量(mg/kg)进行测定的结果表明:底泥中重金属含量沿顺流方向增加;主要重金属含量的最大值分别为:Cu,398.5;Pb,586.9;Zn,6 139.0;Mn,1 608.0;Co,28.74;总Cr,28 259.0;Ni,50.33;V,123.1。运用地积累指数法评价了底泥的重金属污染程度,徐州市北郊工业区河流底泥已受到了重金属的污染,尤其是Zn污染最为严重。荆马河底泥中的重金属不仅是其水体本身的内源污染,也是京杭大运河铜山段底泥重金属污染的主要来源。

Jinghang canal, located in northern industrial district of Xuzhou city. Heavy metal analysis results have shown that the most content of heavy metals up to Cu,398.5 mg/kg; Pb, 586.9 mg/kg;Zn, 6139.0 mg/kg;Mn,1 608.0 mg/kg; Co, 28.74 mg/kg;tolal Cr, 28 259.0 mg/kg;Ni,50.33 mg/kg; V,123.1 mg/kg. According to the Index of Geoaccumulation, the bottom sediment is moderately contaminated to strong or very strong and the Jinghang canal from Hongqixinchun to Xietai brake is moderately contaminated, contamination intensity of the Jingma river bottom sediments has been assessed from middle reaches to lower reaches.