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重力驱动的膜系统处理含有重金属的二次废水:改善了重金属和机制的去除

Xiaobin Ma¹, Yanrui Wang¹, Le Tong¹

¹State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, PR China.

|July 22, 2023

概括

重力驱动膜 (GDM) 系统有效地去除Cr,Pb和Cd等重金属,而生物层至关重要. 铁的添加增强了去除,而的添加阻碍了它,影响了微生物的多样性.

科学领域:

环境科学环境科学
水处理工程水处理工程
微生物学微生物学

背景情况:

二次污水往往含有有毒的重金属,需要先进的处理方法.
重力驱动膜 (GDM) 系统显示了废水处理的潜力,但它们在重金属清除方面的有效性需要详细的研究.
铁 (Fe) 和 (Mn) 等添加剂在重金属修复的GDM性能中的作用尚未完全理解.

研究的目的:

为了研究重力驱动膜 (GDM) 系统的重金属去除性能.
评估铁 (Fe) 和 (Mn) 添加在GDM系统中去除重金属 (Cr,Pb,Cd) 的特定影响.
了解Fe和Mn对GDM系统内的微生物群落的影响及其与重金属去除效率的相关性.

主要方法:

使用重力驱动膜 (GDM) 系统来处理含有重金属的二次废水.
评估重金属去除效率 (Cr,Pb,Cd) 有和没有生物蛋糕层.
研究了不同剂量的铁 (Fe) 和 (Mn) 对重金属去除的影响.
使用分子技术分析微生物社区的多样性,以与治疗性能相关联.

主要成果:

该GDM系统,特别是生物蛋糕层,显示出Cr (98%),Pb (95%) 和Cd (40%) 的高清除效率.
铁的添加显著增强了重金属的去除,归因于新形成的氧化铁的吸附,其效率与Fe剂量呈正相关.
由于竞争性吸附,添加减少了Cd的去除,并减少了微生物多样性,从而对整体重金属的去除产生了负面影响.

结论:

生物蛋糕层对于GDM系统中有效的重金属去除至关重要.
添加铁是一种有前途的策略,通过促进吸附和微生物多样性来增强GDM系统中的重金属去除.
添加对GDM系统中的Cd去除和微生物健康有害,建议对其应用进行仔细考虑.

关键词:

生物蛋糕层是一种生物蛋糕层.引力驱动膜 (GDM) 是一种重力驱动膜.这是一种重金属,重金属.铁和是铁和的组成部分.二级废水是二级废水,二次废水是二次废水.

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