砷污染土壤的生物修复研究进展

土壤As污染已是全球性问题,我国也不例外,对As污染土壤的生物修复已是研究热点,但相关机理仍不完全清楚.本文综述了国内外微生物、蚯蚓、植物在As污染土壤中吸收转化As及其解As毒机理,以及微生物-植物复合系统修复As污染土壤方面实验室内研究情况.目前广泛认为植物修复土壤重金属/非金属污染较有应用前景,可限于甚至是使用超富集植物单一作用下仍有较多缺陷,如通过微生物技术及蚯蚓调节根际微生态,以利于植物在污染土壤中存活或/和吸收更多的As,将极具应用前景.

Bio-remediation of Arsenic-polluted Soil:Recent Advancements

Arsenic pollution of soils has been an issue of concern the world over, including China, and bioremediation of arsenic polluted soil a hot spot of research. However, related mechanisms of the bioremediation are not yet fully understood. A review is presented of recent advancements in the study the world over on mechanism of microbiomes, earthworms and plants assimilating and detoxifying arsenic, and lab experiments on remediation of arsenic-polluted soil with a complex microbiome-plant system in this paper. At present, it is generally deemed that the technology of plant remedying soils polluted by heavy metal/metalloid has a bright prospect of application, however, it has demonstrated a number of shortcomings even if it is limited to or uses the single function of hyperaccumulating plants. If microbiological technologies and earthworms are used in addition to regulate micro-ecology of the rizosphere, so as to facilitate survival and/or absorption of As, the technology will further broaden its prospect of application in the future.