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生物吸附剂ZL5-2对Cr(Ⅵ)的吸附机理
引用本文:李强,陈明,崔富昌,程剑锋,张玉臻.生物吸附剂ZL5-2对Cr(Ⅵ)的吸附机理[J].环境科学,2006,27(2):343-346.
作者姓名:李强  陈明  崔富昌  程剑锋  张玉臻
作者单位:山东大学微生物技术国家重点实验室,济南,250100
基金项目:国家自然科学基金项目(29877010);江苏省科学基金项目(BK2002088)
摘    要:为测定环境样品中氯菊酯农药残留,用活泼酯法将氯菊酯半抗原(Py)与卵白蛋白(OVA)偶联,制备合成抗原Py-OVA作包被原,建立间接竞争酶联免疫吸附测定法.方阵滴定确定了抗血清最佳稀释度(1∶2 500),包被抗原的最适工作浓度0.45μg/mL,并建立了标准工作曲线.工作曲线表明在10~800μg/L浓度范围内呈良好的线性关系,回收率>97%.

关 键 词:生物吸附剂  铬离子  红外光谱分析  吸附机理
文章编号:0250-3301(2006)02-0343-04
收稿时间:2004-12-07
修稿时间:2004-12-072005-02-10

Adsorption Mechanism of Chromium Cation by Floc-Type Biosorbent ZL 5-2
LI Qiang,CHEN Ming,CUI Fu-chang,CHENG Jian-feng and HANG Yu-zhen.Adsorption Mechanism of Chromium Cation by Floc-Type Biosorbent ZL 5-2[J].Chinese Journal of Environmental Science,2006,27(2):343-346.
Authors:LI Qiang  CHEN Ming  CUI Fu-chang  CHENG Jian-feng and HANG Yu-zhen
Institution:State Key Laboratory of Microbial Technology, Shandong University, Ji'nan 250100, China.
Abstract:Biosorption of Cr(VI) by the novel biosorbent ZL5-2 produced by Agrobacterium sp. was studied and infrared spectra of native, absorbing and desorbing ZL 5-2 were compared. The initial pH was important for biosorption. The optimum effect on Cr(VI) biosorption was acquired within initial pH 0.5 to approximately 1.5, then with the pH increasing, the effect on Cr6+ biosorption was reduced. The biosorption for Cr(VI) was a quick process,only within 10 min 65.4% Cr(VI) is biosorbed, and the biosorption rate was over 90% after 60 min, then all the Cr(VI) was biosorbed after 80 min. The biosorption were fitted with Langmuir and Freundlich isotherm adsorption equations. The absorbed Cr(VI) could be recovered by desorption and the desorption rate reached 13.696% to approximately 67.9%. Progress of biosorption was reversible adsorption and irreversible adsorption simultaneously through infrared spectra analysis, however the reversible adsorption was more important in the biosorption and the adsorption belongs to physics adsorption.
Keywords:biosorbent  chromium cation  infrared spectrum  adsorption mechanism
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