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电流对钋青霉菌吸附和固定铅离子的响应机制
Response mechanism of electric current on adsorption and immobilization of lead by Pencillium polonicum
投稿时间:2017-08-31  修订日期:2017-10-10
中文关键词:  钋青霉菌  吸附  电流
英文关键词:lead  Penicillium polonicum  adsorption  electric current
基金项目:国家重点基础研究规划项目"973"计划(2014CB846003);国家自然科学基金资助项目(41672332,41230103)
作者单位E-mail
王明粲 造山带与地壳演化教育部重点实验室, 北京大学 地球与空间科学学院, 北京 100871  
郝瑞霞 造山带与地壳演化教育部重点实验室, 北京大学 地球与空间科学学院, 北京 100871 rxhao@pku.edu.cn 
丁杨 造山带与地壳演化教育部重点实验室, 北京大学 地球与空间科学学院, 北京 100871  
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中文摘要:
      重金属铅污染是一种主要的环境污染类型,对生态以及人类健康存在着极大的威胁。如何修复铅污染是目前亟待解决的关键性问题。在众多的铅污染修复方法中,微生物修复法具有独特的优势。本实验中所使用的钋青霉菌是已被验证的对铅具有高耐受度和高吸附率的优秀菌种。在此基础上,本实验的主要研究目的在于进一步提高该菌种对铅的吸附、固定能力。实验采用双室电解池体系,分组设置0.5 V至1.5 V的梯度槽压,以观察不同电压下电流对钋青霉菌生长环境及对铅离子吸附作用的影响。实验结果表明,电流既可能促进也可能抑制钋青霉菌对铅离子的吸附和固定作用,其作用结果与外加电压的大小有关,在1.0~1.25 V的最适电压区间下,电流能增强钋青霉菌对铅离子的吸附和固定能力。
英文摘要:
      Lead pollution is a kind of environmental pollution, which leads to serious problems to ecology and human health. In such a situation, how to repair lead pollution is a key issue that needs to be solved urgently. Compared with other lead pollution remediation methods, bioremediation has unique advantages. Penicillium polonicum, the fungi used in this experiment, is the strain with proven high tolerance and high adsorption rates to lead. On the basis of previous studies, the main purpose of this experiment is to improve the adsorption and immobilization capability of Penicillium polonicum to lead. Double chamber electrolytic cell was used in this experiment to observe the effect of the current on the growth environment and the adsorption of lead by fungi at different voltage ranges from 0.5 V to 1.5 V. The results show that the electric current could either promote or inhibit the adsorption and immobilization of lead ions by Penicillium polonicum. The effect of the current is related to the voltage. The current could enhance the adsorption and immobilization of lead by the strain under the most appropriate voltage range between 1.0 V and 1.25 V.
王明粲,郝瑞霞,丁杨,2017,电流对钋青霉菌吸附和固定铅离子的响应机制[J].岩石矿物学杂志,36(6):858~864.
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