抗Cr^(6+)微生物的筛选及其吸附特性的研究  

Study on Screening of Cr^(6+)-tolerant Microbes and Their Adsorption Characteristics

作　　者：王显[1] 吴若菁[1] 陈艳芳[1] 张小菲[1] 

机构地区：[1]福建师范大学生命科学学院,福建福州350108

出　　处：《贵州农业科学》2011年第5期137-140,共4页Guizhou Agricultural Sciences

基　　金：福建省科技厅重点项目"炭基多功能水土修复剂的研究开发"(2007N0042);福州市科技局重点项目"炭基多功能水土修复剂的研究开发"(2006Z039)

摘　　要：为筛选出对Cr6+具有较高抗性和吸附能力的菌株,采用了平板涂布法,对其进行了分离筛选,研究不同pH值、温度、吸附时间、吸附剂用量、Cr6+初始浓度条件下菌株对Cr6+吸附的影响,并对吸附等温线方程进行了筛选。结果表明:分离筛选出1株具有较高抗性和吸附能力的菌株(L 4);L 4菌株在pH 2.0、温度30℃、吸附时间6 h、吸附剂用量6 g/L、Cr6+初始质量浓度20 mg/L的条件下,对Cr6+的吸附率达88.5%,吸附量为2.95 mg/g。数学模型Langmuir方程能很好地描述L4菌对Cr6+的吸附过程。Bacterium strain that could absorb and highly resist Cr6＋ was isolated from the polluted soil by spread plate method, effects of pH, temperature, adsorption time, adsorbent dosage and initial Cr6＋ concentration on adsorption of Cr6＋ were studied and the absorption isotherms equation was screened as well, The results showed that L4, a bacterium strain that could absorb and highly resist Cr6＋ was isolated and screened out. The adsorption rate and adsorption capacity could be up to 88. 5% and 2. 95 mg/g respectively under conditions of pH 2.0, 30℃, 6 h of adsorption time, 6 g/L of adsorbent dosage and 20 mg/L of initial Cr6＋ concentration, The adsorption process was well accorded with the Langmuir model.

关 键 词：分离纯化 重金属 CR^6+ 生物吸附 

分 类 号：S182[农业科学—农业基础科学] Q939.96[生物学—微生物学]