广西南丹地区重金属污染土壤修复对策研究

Research on Remediation of Heavy Metal Pollution Soil in Nandan Area of Guangxi

广西南丹地区的锡多金属矿床是中国的特大型富矿,在过去的矿山建设中已经对周边土壤造成了严重的重金属污染。该地区的土壤以红土为主,红土与中国中部的黄土和东北的黑土的形成过程、土壤的p H值、土壤中阳离子的含量、土壤中粘土矿物种类等均明显不同。在重金属污染土壤修复过程中,根据南丹地区土壤的特点,认为在注重化学修复的同时,赤泥是一种潜在的修复剂,赤泥经过处理后加到土壤中,不但能修复重金属污染土壤,同时可以达到了废物利用的目的。

The tin polymetallic ore deposits in Nandan Area of Guangxi is a large rich ore deposits in China, and the mining construction have caused serious heavy metal pollution in surrounding soil in the past. The soil in this area is dominated by red soil. The red soil in the area is significantly different from that in the middle of China and the black soil in Northeast China in terms of soil formation process, pH value, cation content and clay minerals types. In the process of heavy metal polluted soil re-mediation, according to the characteristics of soil in Nandan, this study concludes that“the red mud of bauxite mine” is a poten-tial restoration agent of heavy metal polluted soil in Nandan. Adding the right amount of treated red mud in soil not only can a-chieve the purpose of remediation of heavy metal contaminated soil, but also achieve the purpose of waste recycling.