粉煤灰在土地整治工程中的研究及应用现状

THE STATUS OF APPLICATIONS AND RESEARCHES OF FLY ASH USED IN LAND CONSOLIDATION ENGINEERING

粉煤灰是一种年产量巨大,且含有多种重金属元素的工业废弃物,通常不适宜直接种植植物,对环境造成严重污染且占压大量土地资源。通过对粉煤灰的理化性质进行分析,介绍了粉煤灰在土地整治工程中的研究和应用现状,重点介绍了粉煤灰的改土作用及其机理,对作物生长、发育和环境的影响,重金属元素的迁移规律及环境风险评估等。在此基础上,对土地整治工程中施用粉煤灰存在的问题与对策进行了初步分析和探讨。

Fly ash is one of the key solid wastes emitted from the thermal power plants,and its annual output was huge. For containing a variety of heavy metal elements,it's not suitable for direct agricultural usage and could cause serious environment pollution and occupied large area of land. The utilization ratio of fly ash is rather low yet,in China. The physico-chemical properties of fly ash were analyzed,and the status of application and research of fly ash which used in the land consolidation engineering were introduced; moreover,the impact of fly ash on soil improvement and plants grows as well as transport,and movement of heavy metal elements and environment risks assessment were reviewed. Based on that,the problems and solutions of the land consolidation engineering with fly ash were analyzed and discussed.