Evaluation and control of the geo-environmental impact due to environmental chemicals

为了最大限度地减少土壤和地下水的污染，研究了几种化学品对地质环境的影响。主要研究结果如下：(1)研究了酸雨对稳定土和未稳定土的理化性质和工程性质的影响。提出了对工程性质有重要影响的稳定土中和作用的预测公式。(2)从实验和分析两个方面评价了稳定土碱化对环境的影响。提出了减小碱液对地下水影响的方法。(3)从地质环境影响的角度，对稳定化生活垃圾飞灰和污水焚烧灰样进行了批浸和柱浸试验。分析了垃圾填埋场重金属浸出对环境的影响。(4)对土工膜衬垫、粘土衬垫和复合衬垫的性能进行了综述，提出了垃圾填埋场衬底的评价方法。提出了“填埋”的概念，即通过回收大量的废物和挖掘剩余的土壤来创造新的环境。

Geo-environmental impact due to several chemicals was studied to minimize the soil and groundwater contamination. The main results from this study can be summarized as follows : (1) Effect of acid rain on the physico-chemical and engineering properties of stabilized and unstabilized soils was evaluated. The equations to predict the neutralization of stabilized soil, which significantly affects the engineering properties, was proposed. (2) Environmental impact due to alkali from the stabilized soil was experimentally and analytically evaluated. The method to minimize the impact of alkali on groundwater was proposed. (3) Batch and column leaching tests were conducted on the specimens of stabilized MSW fly ash and sewage incinerated ash from the view of geo- environmental impact. Environmental impact of leaching heavy metals leaking from landfill sites was analyzed. (4) The performance of landfill bottom liners (geomembrane liner, clay liner, and composite liner) was reviewed and its evaluation method was proposed. "LANDFILL" concept, to create the new environment by reclaiming a huge amount of waste materials and excavated surplus soils, was proposed.