不同铬修复技术中试应用研究

Piolt Study on Different Remediation Technologies of Chromium

我国铬(Cr)污染问题日益严重,对Cr污染土壤的修复治理极为迫切。本研究分别对异位化学还原技术、异位生物化学还原技术、原位化学还原技术和原位生物化学还原技术进行了中试研究。研究结果表明,以上修复技术均可将Cr(Ⅵ)浓度降至人类健康可接受的风险水平以下,实现Cr(Ⅵ)污染土壤的修复,且修复效果具有一定的稳定性。

The problem of chromium contaminated of soil in China is becoming increasingly prominent.It is extremely urgent to remediate the chromium contaminated soil.In this study,the ex-situ chemical reduction remediation technology,ex-situ bio-chemical reduction remediation technology,in-situ chemical reduction remediation technology and in-situ biochemical reduction remediation technology are studied in pilot scale.As the results shows,the hexavalent chromium in soil could be reduced to below the acceptable risk level of human health by each of the above remediation technologies,and the remediation effect had a certain stability.