微电强化赖氏菌去除铀的机理研究

Microcurrent Enhanced Uranium Removal Mechanism By Leifsonia sp.

采用直流电强化赖氏菌的方式去除水溶液中的铀。通过对比实验组与对照组前后溶液中铀的含量,结合现代检测技术深入探究直流电场对赖氏菌吸附铀的机理。实验结果表明,赖氏菌最佳吸附pH为6,去除率可达99.8%,最大吸附量为49.9 mg/g,较对照组去除率提高18.49%。准二级动力学更适用于拟合赖氏菌吸附铀的过程,以化学吸附为主。通过现代检测方式进行表征,数据分析结果表明,菌体细胞壁上的C=O、C—O—C、O—C/H、—COOH、—NH_(2)等官能基团是其吸附的主要官能团。

Micro current was used to strengthen the uranium removal rate by Leifsonia sp.in solution.The adsorption mechanism was discussed through comparative analysis and modern detection technology.The result show that the removal rate can reach 99.8%(adsorption capacity is 49.9 mg/g),which increases 18.49%compared to control group when pH is 6.The quasi-secondary dynamics ismore suitable for fitting of the adsorption.Characterization by modern detection methods and data analysis results show that the C=O,C—O—C,O—C/H,—NH_(2),etc.on the Leifsonia sp.surface is the main functional group of adsorption process.