河北科技大学学报2017，Vol.38Issue(5)：493-498,6.DOI:10.7535/hbkd.2017yx05013
固定化氧化还原介体加速Escherichia coli BL21还原Cr(Ⅵ)的影响因素研究
Research of the influencing factors of the immobilized redox mediators accelerating Cr(Ⅵ) reduction by Escherichia coli BL21
摘要
Abstract
In order to study the influencing factors of non-dissolved redox mediators on Cr (Ⅵ) bioreduction,the accelerating effect of non-dissolved redox mediators immobilized by cellulose acetate (CA) on the reduction of Cr(Ⅵ) by Escherichia coli BL21 is investigated.The results show that the accelerating order is 1-chloroanthraquinone＞ 1,5-dichloroanthraquinone＞2-chloroanthraquinone＞1,8-dichloroanthraquinone＞ anthraquinone＞ 1,4,5,8-tetrachloroanthtaquinone;the optimal concentration of 1-chloroanthraquinone pH and initial Cr(Ⅵ) concentration are 0.048 mol/L,7.00 and 30 mg/L,respectively;the removal rate increases with the increasing temperature when it is in the range of 20～ 60 ℃;after 6 times of recycling experiments,and the Cr(Ⅵ) bioreduction rate with the immobilized 1-chloroanthraquinone maintains above 5 times of margin bacteriurn's.It indicates that non-dissolved redox mediators immobilized by CA can effectively accelerate the reduction rate of Cr(Ⅵ)by Escherichia coli BL21,which has favourable application value.关键词
水污染防治工程/Cr(Ⅵ)/氧化还原介体/生物还原/固定化Key words
water pollution control engineering/Cr(Ⅵ)/redox mediators/bioreduction/immobilization分类
资源环境引用本文复制引用
平佳芃,许志芳,郭延凯,郭建博,廉静..固定化氧化还原介体加速Escherichia coli BL21还原Cr(Ⅵ)的影响因素研究[J].河北科技大学学报,2017,38(5):493-498,6.基金项目
国家自然科学基金(51208170) （51208170）
