明山煤矿区废弃地重金属污染土壤环境质量评价

Appraisal for Environmental Quality of Soil Polluted by Heavy Metals in Wasteland of Coalmine Tailing in Mingshan of Guangdong

为了科学评价广东省明山煤矿区废弃地土壤重金属污染情况,于2010年11月至2011年3月采集明山煤矿区废弃地受重金属污染的5个样点的土壤样品,运用原子吸收分光光度法对土壤中7种重金属元素进行测定。结果表明,①土壤pH为2.87~6.16,土壤较贫瘠。②土壤污染主要是Cd、Mn污染,其中Cd平均含量为2.052 mg/kg（0.759~3.109 mg/kg）,超标严重;Mn平均含量为421.215 mg/kg（387.057~488.660 mg/kg）,污染严重。③从内梅罗综合污染指数看,样点1、样点4、样点5为极重污染,样点2、样点3为中度污染。

In order to appraise wasteland of coalmine tailing heavy metal element pollution,in November 2010 to March 2011,the environmental quality of soil polluted by heavy metals in wasteland of coalmine tailing in Mingshan of Guangdong was appraised by measuring 7 heavy metal element in 5 soil samples with atomic absorption spectrophotometry,and the results showed that： ①The soil pH value was 2.87~6.16,soil too infertile;②Soil pollution was mainly due to the Cd and Mn,of which Cd average content of soil was 2.052 mg / kg（between 0.759 to 3.109 mg / kg）,much higher than the national secondary standard of GB 15618-1995（Environmental quality standard for soils in P.R.China）,and Mn average content of soil was 421.215 mg / kg（between 387.057 to 488.660 mg / kg） with serious pollution;③Soil sample 1,4 and 5 indicated very serious pollution,and soil sample 2 and 3 showed medium level pollution from Nemerow integrated pollution index.