环境砷的存在状态、生物转化和修复研究进展

Existing Mode,Transformation and Remediation of Arsenic in Environment

砷是环境中以低浓度广泛天然存在的一种非金属元素,与其它元素形成无机和有机的复合物。不同形式的砷通过化学的电子转移、甲基化和烷基化等复杂机制使不同形态的砷相互转化。砷转化机制的研究为砷污染的治理提供新的技术方法,但由于面临诸多的问题,目前还没有一种单一的修复技术被广泛地应用于砷污染环境的治理。本文就近年来有关环境中砷的来源和存在、生物转化和修复的机制进行综述,为砷污染的修复和环境治理提供科学指导。

Arsenic is a natural metallic element found in low concentrations in virtually every part of the environment. It exists in inorganic and organic forms which formed complexes with other elements. The different existing modes of arsenic in environment with various channels transform each other by complex mechanism of electron transfer, methylation and alkylation. Although the progress of transformation mechanism provides new techniques for remediation of Arsenic contamination, remediatiou of eontaminative water body of arsenic are persecuted by many difficulties. No single kind of restoration techniques is used to remediate arsenic contamination of environment. This paper is mainly on the recent progress on the existing mode, transformation and remediation of arsenic in environment, in order to provide scientific guidance for remediation of arsenic pollution.