首页 | 本学科首页   官方微博 | 高级检索  
     

解脂假丝酵母对重金属工业废水的吸附特性
引用本文:叶佩青,檀笑,詹志薇. 解脂假丝酵母对重金属工业废水的吸附特性[J]. 生态科学, 2011, 30(5): 541-546
作者姓名:叶佩青  檀笑  詹志薇
作者单位:1. 广州市番禺区环境科学研究所, 广州 511400; 2. 环境保护部华南环境科学研究所, 广州 510655; 3. 东莞市环境保护局, 东莞 523000
基金项目:中央级公益性科研院所基本科研业务专项项目(2603060902N)
摘    要:利用解脂假丝酵母对Cr(Ⅵ)、Ni(Ⅱ)和Cu(Ⅱ)共存的模拟重金属废水及3种实际重金属废水进行了微生物吸附,结果表明,pH、吸附时间和菌浓度等均是显著的影响因素.Cr(Ⅵ)、Ni(Ⅱ)和Cu(Ⅱ)的去除均符合准一级和准二级动力学模型,其中准二级模型的拟合效果最理想,证明该菌种对重金属的吸附包括了多个步骤,其中化学吸附是限速步骤.解脂假丝酵母对共存重金属的生物吸附效果理想,1g·L-1菌体在120min时,对18.7~37.86mg·L-1Cr、2.39~9.21mg·L-1Cu、2.27~9.87mg·L-1Ni和0.43~1.32mg·L-1Zn的去除率分别为81.6%~84.6%、84.0%~100%、84.1%~100%和93.9%~100%.菌体的蛋白质、脂质和多糖均参与了重金属吸附,起作用的主要功能团是-OH、-NH2、-CH2、-CH3、-COOH、-CHO、C=C、-PO43-和-SO3H.

关 键 词:重金属  生物吸附  解脂假丝酵母  
收稿时间:2011-10-25

Biosorption of wastewater containing heavy metals by Candida lipolytica
YE Pei-qing,TAN Xiao .Panyu Institute of Environmental Sciences,Guangzhou ,China .South China Institute of Environmental Sciences,Ministry of Environmental Protection,Guangzhou ,China. Biosorption of wastewater containing heavy metals by Candida lipolytica[J]. Ecologic Science, 2011, 30(5): 541-546
Authors:YE Pei-qing  TAN Xiao .Panyu Institute of Environmental Sciences  Guangzhou   China .South China Institute of Environmental Sciences  Ministry of Environmental Protection  Guangzhou   China
Affiliation:YE Pei-qing~1,TAN Xiao~(2*) 1.Panyu Institute of Environmental Sciences,Guangzhou 511400,China 2.South China Institute of Environmental Sciences,Ministry of Environmental Protection,Guangzhou 510655,China
Abstract:The biosorption of simulation wastewater with coexisted Cr(Ⅵ),Ni(Ⅱ) and Cu(Ⅱ),and three kinds of actual wastewaters by Candida lipolytica was investigated.The results showed that initial pH,contact time and biosorbent dosage were the major influencing factors.Research on the dynamics reflected that the biosorption complied with both the first-order and the second-order kinetic models,and the second-order kinetic models had higher correlation coefficients,confirming that the biosorption process included multiple steps and chemical adsorption was the rate-determining step.After the wastewater containing 18.7-37.86 mg·L-1 of Cr,2.39-9.21 mg·L-1 of Cu,2.27-9.87 mg·L-1 of Ni and 0.43-1.32 mg·L-1 of Zn was absorbed with 1 g·L-1 biosorbent for 120 min,the biosorption rates on the above metals were 81.6%-84.6%,84.0%-100%,84.1%-100% and 93.9%-100%,respectively.The results suggested that C.lipolytica was an effective strain to remove combined pollutants from aqueous solution.Moreover,proteins,lipids and carbohydrates of the biosorbent participated in the binding of these heavy metals.The main functional groups were -OH,-NH2,-CH2,-CH3,-COOH,-CHO,C=C,-PO43- and -SO3H.
Keywords:Heavy metals  biosorption  Candida lipolytica  
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《生态科学》浏览原始摘要信息
点击此处可从《生态科学》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号