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通过催化铁碳微电解和微生物合的酸转化研究

Qiong Wan¹, Xiayin Li¹, Feng Wang²

¹School of Architecture and Civil Engineering, Xi'an University of Science and Technology Xi'an 710054 China xyzhang2020@xust.edu.cn.

|April 5, 2024

概括

这项研究表明,铁碳微电解与微生物相结合有效地从水中去除酸. 添加砂增强了微生物的生物多样性,但在酸盐去除过程中降低了微生物的总体活性.

科学领域:

环境科学环境科学
环境工程环境工程
微生物学微生物学

背景情况:

水中的酸盐-污染是一个重大的环境问题.
铁碳微电解 (ICME) 是一个有前途的技术,用于酸盐去除.
将ICME与微生物过程结合起来,可以提高去除效率.

研究的目的:

探索酸去除的过程和机制,使用一种与微生物结合的新型ICME系统.
在不同的ICME配置下,确定酸在水中的转化途径.
分析生物炭和砂对ICME性能和微生物群落结构的影响.

主要方法:

使用海绵铁 (s-Fe0),海绵铁+生物炭 (s-Fe0/BC) 和海绵铁+生物炭+砂 (s-Fe0/BC/MS) 的连续流反应装置.
用扫描电子显微镜和X射线光电谱分析了海绵铁的形态和组成变化.
使用高通量测序和FAPROTAX功能注释分析了微生物种群的变化.

主要成果:

在所有测试系统 (s-Fe0,s-Fe0/BC,s-Fe0/BC/MS) 中,酸盐的转化率超过了99%.
与s-Fe0/BC/MS系统相比,s-Fe0/BC/MS系统显示微生物多样性增强,但酸盐和气呼吸活动减少.
异质型细菌 (Thauera,Acetoanaerobium) 占主导地位,而随着砂的添加,自型氧的增加.

结论:

结合的ICME和微生物系统有效地将酸转化为气和氨.
二氧化 (MnO2) 催化了Fe2+转化为Fe3+,为脱提供电子.
虽然砂增强了生物多样性,但其添加可能会降低ICME系统中微生物脱的整体效率.

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