客土改良技术及其在砷污染土壤修复中的应用展望

砷是一种毒性很强且对人体健康威胁很大的金属元素,土壤砷污染与修复长期以来受到各国政府和科学家的广泛关注。客土改良技术是污染土壤修复中较常用和有效的方法之一,近年来逐渐受到关注。本文在简述土壤中砷来源及其危害的基础上,重点对近年来该技术在土壤改良及污染土壤修复中的应用进行了系统整理,并以此为基础,比较了砷污染土壤的物理、化学及生物修复的效果。结合我国部分地区耕地砷污染较严重的现状,认为客土改良技术见效快、改良较彻底、且具有较高的实用性。同时,论文还对客土技术在砷污染土壤修复中的研究重点及应用前景等进行了展望。

Application and outlook of alien earth soil-improving technology in arsenic-contaminated soil remediation

Arsenic is a metalloid element with severe toxicity that poses a huge threat to human health. Arsenic-contaminated soils and the remediation of these soils have drawn widespread concerns from governments and the scientific community. There has been a growing interest in alien earth soil-improving technology in recent years, evident in the more frequent use of this technology in the remediation of contaminated soils that has so far proven to be one of the most effective methods. Based on the sources and toxicity of arsenic soils, a systematic review was conducted on the application of alien earth soil-improving technology in remediating arsenic- contaminated soils. The effectiveness of the physical, chemical and biological remediation techniques in arsenic-contaminated soils was also compared. In terms of serious arsenic pollution in some cultivated lands in China, alien earth soil-improving technology was noted to be an effective and practical method of restoration of contaminated soils. Based on this finding, further in-depth researches on the application and outlook of alien earth soil-improving technology in remediating arsenic-contaminated soils were proposed.