粉煤灰在土壤改良和污染治理中研究进展

摘要

Based on the physical and chemical properties of coal fly ash, the study comprehensively described the research and application ofrncoal fly ash in soil amendment and pollution treatment at home and abroad. As soil amendment, coal fly ash can decrease the soil bulk densityrnaffectively and adjust the soil pH and increase the heat insulation capacity of soil, meanwhile it may also improve the nutrients of the soil andrnaffect the soil microbial biomass greatly. In pollution control, coal fly ash mainly used in wastewater treatment, heavy metal passivation andrnwaste gas purification. At last, the existing problems of research and application of coal fly ash in soil amendment and pollution treatment andrntheir countermeasures were put forward.%从粉煤灰理化性质出发,综述了国内外对粉煤灰在土壤改良和污染治理方面的应用.粉煤灰作为土壤改良剂,可以增加土壤容重,提高土壤持水性能和保温能力,调节土壤pH,改善土壤营养状况.在污染治理方面,粉煤灰主要应用于废水处理、重金属钝化和废气滤除.最后,指出粉煤灰在土壤改良和污染治理方面存在的问题和对策.