固定化生物活性炭对矿山酸性废水中Zn^(2+)的吸附性能  

Biosorption Characteristics of Heavy Metal Zn^(2+)from Acid Mine Drainage by Immobilized Biological Activated Carbon

作　　者：林海[1,2] 周闪闪[1,2] 董颖博[1,2] 许晓芳[1,2] 

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083 [2]北京科技大学土木与环境工程学院,北京100083

出　　处：《东北大学学报（自然科学版）》2013年第9期1352-1356,共5页Journal of Northeastern University(Natural Science)

基　　金：国家环境保护公益性行业科研专项(201209013)

摘　　要：以筛选出的芬式纤维微菌属菌株T1为研究对象,研究了其用于固定化生物活性炭(IBAC)工艺对矿山酸性废水(AMD)中重金属Zn2+的吸附规律.结果表明,在水力负荷0.19 m3·(m2·h)-1、气水体积比10∶1、水力停留时间3.80 h,IBAC对Zn2+质量浓度100.00 mg/L,pH值4的酸性废水中Zn2+去除率达到75.18%,且水质得到改善.共存离子Cu2+,Cd2+,Fe3+,Ni2+使IBAC对Zn2+的去除率降低.扫描电镜发现,菌株T1细胞成纤维状,且在活性炭颗粒表面附着生长,吸附Zn2+后细胞体积膨胀.EDS分析表明,固定在活性炭颗粒表面的微生物吸附大量Zn2+.反应动力学研究表明,IBAC吸附AMD中Zn2+基本符合一级反应动力学模型.Taking the strains T1（Cellulosimicrobium funkei） screened out as the research object,and the law of the adsorption w ith Zn2 ＋of acid mine drainage（AMD） by the immobilized biological activated carbon（IBAC） technology w as studied.The results indicated that the removal rate of Zn2 ＋reaches to 75.18% and the w ater quality is improved,under the optimum running parameters of IBAC reactor for treating AMD w ith pH of 4 and initial concentration of Zn2 ＋of 100.00 mg / L,such as hydraulic loading rate of 0.19 m3·（m2·h）-1,gas-water ration of 10∶1,and hydraulic retention time of 3.80 h.Coexisting ions of Cu2 ＋,Cd2 ＋,Fe3 ＋and Ni2 ＋can reduce removal of Zn2 ＋by IBAC.Scanning electron microscopy images show ed that strain T1 cells are fibrous-shape and attach and grow on the surface of the activated carbon particles,and cells volume expansion occurs after adsorption Zn2 ＋.EDS analysis show n that the microorganism fixed in activated carbon particle surface adsorbs a large of Zn2 ＋.Reaction kinetics studies show n that it is basically fit for first-order kinetics model that the IBAC adsorbs Zn2 ＋in AMD.

关 键 词：固定化生物活性炭 矿山酸性废水 重金属锌离子 微生物吸附 菌株T1 

分 类 号：X703.1[环境科学与工程—环境工程]