沈阳经济技术开发区铸锻工业园镉污染调查研究

Investigation on Cadmium Pollution of Casting and Forging Industrial Park in Shenyang Economy and Technique Development District.

本研究以锻造工业园为重点,从制定采样点采集土壤样品,测定土壤样品中的镉含量,并用数理统计方法处理数据,以期全面了解开发区重金属污染现状。参照《土壤环境质量标准》GB15618-1995三级标准,沈阳经济技术开发区待开发区域土壤镉污染指数为清洁级。镉含量垂直分布情况为:由浅到深,镉的平均浓度为降级趋势,由轻度污染到清洁级。土壤中的镉含量有向下移动趋势,50 cm土层土壤含镉量为0.316 2 mg/kg,为清洁级。建议在工业园建设中向土壤中投加石灰,种植对镉具有耐受性和积累性植物,并加强地下水监测。

This paper is focused on Cadmium Pollution of Casting and Forging Industrial Park, We collected soil samples in designated places, measured the content of cadmium, and processed the data in mathematical statistical ways. Comparing with ＂soil environmental quality standards＂ （GB15618 -1995 ） class 3 standard, Cadmium Pol- lution of Shenyang Economic and Technological Development District turn out to be in clean level. Referring from the vertical distribution of cadmium in soil, the average content Cadmium in soil in the deeper layer is lower than that of the upper layer. It is also concluded that there is a trend of cadmium to move downward. The cadmium content is 0. 3162 mg/kg at 50cm soil layer, which is in clean grade. Some measures were recommended to improve the soil and deal with Cadmium Pollution, such as adding calcium oxide into the soil, growing special plants which can tolerate and accumulate Cadmium in the soil, strengthen the monitoring to underground water.