硫酸厂废水污染区土壤和植物中重金属分布特征的研究——以云浮市某硫酸厂为例

Study on the Heavy Metals Distribution of Soil and Plant in Waste Water Pollution Area of a Sulphuric Plant

以云浮市某硫酸厂为例,对其废水污染区土壤和植物中的重金属含量进行了研究。结果表明:该地区土壤受到了Cd、Pb和Zn的污染,其含量远大于国家土壤环境三级标准值;植物中Cu的含量均在正常范围之内,其他元素含量则有超标的现象;圆果雀稗、蟋蟀草对Cd的富集系数分别为1.51和1.03,铺地黍、圆果雀稗对Pb的富集系数分别为1.02和1.29,由于其植物体内的重金属含量较高,可以作为污染区土壤植物固化技术的首选物种;苋菜和乌毛蕨体内的重金属含量较低,可以作为污染区植被重建的先锋物种。

Taking a sulphurie plant in Yunfu for example, the heavy metal content of soil and plant was studied in waste water pollution area. The results showed that the soil in the region was polluted by Cd,Pb and Zn, and the content of the Cd,Pb and Zn was higher than national soil environmental quality standard of grade Ⅲ ; the content of Cu in plant was within the normal limits,while other elements in the plant exceeded normal standard; the enrichment coefficients of Cu were 1.51 and 1.03 for Panicum repens L and Paspalum orbiculare G Forstt, respectively, and the enrichment coefficients of Pb were 1.02 and 1.29 for Paspalum orbiculare G Forstt and Eleusine indica, respectively, they were used as preferrzd species of Phytostabilization in waste water pollution area; Amaranth and Blechnum orientale Linn were used as pioneer plants because of their low content.