甘蓝皮生物吸附去除水中的阳离子染料  

Removal of cationic dyes from water by biosorption of kohlrabi peel.

作　　者：孙影芝[1] 龚仁敏[1] 张小平[1] 刘慧君[1] 杨超[1] 

机构地区：[1]安徽师范大学生命科学学院安徽省重要生物资源保护与利用重点实验室,安徽芜湖241000

出　　处：《中国环境科学》2005年第B06期61-64,共4页China Environmental Science

基　　金：安徽省教育厅自然科学基金资助项目(2003kj157);安徽省重要生物资源保护与利用重点实验室基金资助项目

摘　　要：研究了低值的地产甘蓝皮生物吸附去除水中阳离子染料的可行性,选用了亚甲蓝、中性红、吖啶橙3种染料,研究了各种操作条件对吸附的影响,如吸附剂量、染料浓度、吸附剂粒径、pH值、吸附时间等,确定了最佳吸附条件.结果表明,初始pH值大于4,3种染料去除率高.吸附在12h达到平衡.吸附等温线符合Langmuir或Freundlich模式,吸附过程符合Langergren准一级动力学方程.由此表明甘蓝皮是一种优良的处理阳离子染料废水的生物材料.The feasibility of a low-cost, locally available kohlrabi peel for removal of cationic dyes from water by biosorption was studied. Three kinds of dyes, i.e. methylene blue (MB), neutral red (NR) and acridine orange (AO) were selected for studying the influence of various operation conditions on sorption, such as sorbent dosage, dye concentration, sorbent particle size, pH value and sorption time.The best sorption condition was determined. High removal rate of these three dyes at initual pH value above 4. The sorption equilibrium reached at 12h. The sorption isotherm coincided with Langmuir or Freundlich model. The sorption processes coincided with Langergren pseudo-first-order kinetics equation. Kohlrabi peel was a good biomaterial for treating cationic dyes wastewater.

关 键 词：甘蓝皮 生物吸附 阳离子染料 亚甲蓝 中性红 吖啶橙 

分 类 号：X703[环境科学与工程—环境工程]