铬渣柱浸生物解毒的研究  

Bio-detoxification of chromite ore processing residue by column leaching

作　　者：柴立元[1] 王云燕[1] 朱文杰[1] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083

出　　处：《中国科技论文在线》2008年第5期320-324,共5页

基　　金：教育部高等学校博士学科点专项科研基金(20040533048);教育部新世纪优秀人才支持计划(NCET-05-0689);国家自然科学基金(20477059);国家高技术研究发展计划(863计划)课题(2006AA06Z374)

摘　　要：针对长沙铬盐厂铬渣污染的现状及铬渣的性质,进行了细菌柱浸解毒铬渣的实验。研究结果表明,实验前需将铬渣制成颗粒,解毒工艺的最佳粒径为4~8mm;最佳pH为10.0;最佳温度为30℃。在最佳工艺条件下,铬渣浸出液中Cr（Ⅵ）的浓度由250.6mg/L降为0mg/L,达到国家规定的废水排放标准;解毒后渣的浸出毒性为0.4mg/L,低于国家固体废物浸出毒性标准所规定的1.5mg/L。Column leaching detoxification experiments of chromite ore processing residue （COPR） with Leucobacter sp. Ch-1 were carried out based on the contamination circumstances of Changsha chromate factory and characteristics of COPR. The results indicate that before experiment COPR should be made into particles, and the optimal conditions are particle size of 4-8 mm, pH value of 10.0, and temperature of 30 ℃. Under the optimum conditions, the concentration of Cr（Ⅵ） in the leachate changes from 250.6 mg/L down to 0 mg/L after detoxification, which reaches national discharge standard of waste water, and the leaching toxicity of detoxified COPR with the value of 0.4 mg/L was also lower than the national standard of solid waste.

关 键 词：环境工程学 生物解毒 柱浸 铬渣 

分 类 号：X705[环境科学与工程—环境工程]