through the study of the landfill leachate treatment by the soil and coal slag at different heights it was proved that soil and coal slag had a good adsorption to the pollutants in wastewater
通过不同高度土壤和煤渣处理垃圾渗滤液的试验研究，证明土壤和煤渣对垃圾渗滤液中的污染物具有良好的吸附作用
以上为机器翻译结果，长、整句建议使用 人工翻译 。