摘要
从福州污水处理厂的活性污泥中筛选到一菌株,高效抗Cr(Ⅵ),能把水体中高毒的Cr(Ⅵ)还原成低毒的Cr(Ⅲ).研究了该菌的生长条件,探讨了pH值、温度、初始Cr(Ⅵ)质量浓度、接种量及共存金属离子对Cr(Ⅵ)还原的影响.研究结果表明:该菌株为革兰氏阳性杆菌,有较强的还原Cr(Ⅵ)的能力;在有氧、pH8.0、温度30℃及5.0g/L葡萄糖的条件下,20mg/L的Cr(Ⅵ)可完全被还原;且Cr(Ⅵ)的还原不受共存重金属离子的影响.
One chromate-reducing strain was isolated from the activated sludge of Fuzhou, and can effectively reduced toxic Cr （ Ⅵ） to less toxic Cr （ Ⅱ ） from wastewater. The optimum conditions of growth of the strain and factors affecting reduction efficiency of Cr （ Ⅵ ）, such as the temperature, the pH value of solution, the concentration of Cr （Ⅵ ）, inocula- tion inoculums and the coexistence of metal ions, were studied. The results show that the strain is a gram-positive bacillus and reduction capacity for Cr （ Ⅵ ） is strong. Cr （ Ⅵ ） was reduced completely at the concentration of 20 mg/L under the aerobic conditions, pH 8.0, 30℃and glucose （5.0 g/L） ; and reduction efficiency of Cr （ Ⅵ ） is not affected by coexistence of metal ions.
出处
《福建师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第2期78-82,共5页
Journal of Fujian Normal University：Natural Science Edition
基金
福建师范大学闽江学者人才引进基金项目(200604)
关键词
还原菌
筛选
六价铬
生物修复
reducing bacteria
isolation hexavalent chromium
bioremediation
作者简介
通讯作者：林玉满，教授，主要从事微生物处理环境中重金属污染的研究．ymlin@fjnu．edu．cn
