Reduction of Fe(III)EDTA^{鈭?/sup> in a NO_x scrubbing solution by magnetic Fe₃O₄-chitosan microspheres immobilized mixed culture of iron-reducing bacteria}

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• 作者：Guohua Jing ; ^{zhoujing@hqu.edu.cn} ; Jin Zhou ; Zuoming Zhou ; Tianming Lin
• 关键词：Magnetic microsphere ; Immobilization ; Iron-reducing bacteria ; NOx removal
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：March, 2012
• 卷：108
• 期：Complete
• 页码：169-175
• 文件大小：308 K

摘要

Magnetic Fe₃O₄-chitosan microspheres were prepared by co-precipitating of Fe²⁺ and Fe³⁺ ions with NaOH in the presence of chitosan. The saturated magnetization of the resulting material was 20.0 emu/g. Then these magnetic microspheres were employed to immobilize iron-reducing bacteria to improve the biological reduction of Fe(III)EDTA^{鈭?/sup>, which was one of the key steps in nitrogen oxides (NO_x) removal by the integrated chemical absorption-biological reduction process. The immobilized bacteria performed well on Fe(III)EDTA鈭?/sup> reduction than free bacteria, even under unfavorable pH and temperatures. Furthermore, the effects of , and S2鈭?/sup>, the potential inhibition compounds in the scrubber solution, on the reduction of Fe(III)EDTA鈭?/sup> by the immobilized and free bacteria were also studied.}