砷污染土壤治理工艺进展

Progress in Treatment of Arsenic Contaminated Soil

砷是自然界常见元素,环境中的砷源自包括含砷金属矿石的开采、焙烧、冶炼、化工、炼焦、火电、造纸、皮革等生产过程中排放的含砷烟尘、废水、废气、废渣,在冶金工业生产过程中,约有30%左右的砷进入水、气和土壤中,使附近土地受到严重的砷污染。砷污染土壤给人类生态环境造成巨大危害,已经成为全球性的环境问题。人们对清除土壤砷方法进行了大量研究,当前砷污染土壤治理工艺主要有:固化/稳定化、焙烧挥发、沉淀、萃取、淋洗、生物法等。本文对砷污染土壤的处理工艺进行了简单介绍。

Arsenic is a common element in nature, environmental arsenic from arsenic metal ore mining, roasting, smelting, chemical, metallurgical, power, paper, leather and other production process emissions containing arsenic dust ,waste water,waste gas and waste residue. In the production process of metallurgical industry, about 30% of the arsenic emitted in water, air and soil in land near by caused serious arsenic contamination. Arsenic contaminated soil has caused great harm to human ecological environment, and has become a global environmental problem. There has been a lot of research on the removal of soil arsenic, the arsenic contaminated soil remediation process mainly in- clude ： solidification/stabilization, volatilization roasting, precipitation, extraction, leaching and biological method. In this paper, the processing technology of arsenic contaminated soil at home and abroad is introduced briefly.