生活垃圾分类回收处理对周边土壤中铅、锰重金属污染的影响

为了研究生活垃圾分类回收处理对周边土壤中铅、锰重金属污染的影响,选用我国北方某市生活垃圾中转站及其附近1 km范围内的土壤作为研究样本,在中转站外设立一个垃圾回收对照区。给出土壤p H和土壤有机质测定方法,介绍了铅、锰含量测定过程。通过单因子污染指数和内美罗综合污染指数对土壤中铅、锰的污染情况进行衡量,分析了研究区域生活垃圾物理组成。为了使得到的结果更加准确,对铅、锰的分布特征及其和土壤理化性质间的关系进行分析,确定土壤对铅、锰重金属污染的影响程度。给出不同采样区表层0~20 cm土壤中重金属铅、锰的污染情况和污染指数评价结果。分析了土壤中重金属铅、锰化学形态分布情况。结果表明,土壤p H与有机质含量对生活垃圾分类回收中转站周边土壤中锰含量基本没有影响,可忽略;生活垃圾分类回收能够降低周边环境风险。

Effects of municipal solid waste sorting and recycling on Pb, Mn and heavy metals pollution in surrounding soil

in order to study the recycling garbage treatment effect on lead and manganese pollution of heavy metals in the soil around, choose a city in the North China garbage transfer station and near the 1KM range of soil as the research sample, the establishment of a garbage transfer station in the recovered control area. The determination methods of soil pH and soil organic matter were given. The determination process of lead and manganese was introduced. Measured by the pollution situation of single factor pollution index and comprehensive pollution index is applied to lead and manganese in soil, analyzed the physical area of life garbage. In order to make the result more accurate, the distribution characteristics of lead and manganese and their relationship with soil physical and chemical properties were analyzed to determine the influence of soil on lead, manganese and heavy metal pollution. The pollution and pollution index of heavy metal lead and manganese in surface soil of 0~20cm in different sampling areas were given. The chemical forms and distribution of heavy metals lead and manganese in soil were analyzed. The results showed that the soil pH and SOM content had no influence on the manganese content in the soil around the transfer stations and could be neglected. The municipal solid waste recycling could reduce the risk of the surrounding environment.