的降解和沉 (VI) 使用化膜生物膜反应器
Chengyang Wu1, Jingzhou Zhou2, Si Pang2
1School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, China.
Water research
|November 26, 2023
概括
这项研究表明,膜生物膜反应器中的纳米颗粒有效地减少水中的有毒六价 (Cr(VI)). 该Pd-MBfR技术有效地去除Cr (VI) 并促进氧化的沉.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 催化剂是一种催化剂.
背景情况:
- 六价 (Cr(VI)) 是水中的有毒污染物.
- 使用贵金属的 (H2) 驱动的减少显示出Cr (VI) 去除的前景.
- 挑战包括不良的H2转移和催化剂损失,阻碍了水处理应用.
研究的目的:
- 为了研究元素纳米粒子 (PdNP) 对于Cr (VI) 减少的有效性.
- 为了评估装饰膜生物膜反应器 (Pd-MBfR) 的性能,用于水处理.
- 评估PdNP催化Cr(VI) 减少对微生物群落和副产品形成的影响.
主要方法:
- 构建了一个膜生物膜反应器 (MBfR),使用现场生成的纳米粒子 (PdNP).
- 将Pd-MBfR的性能与使用Cr (VI) 污染水的非 MBfR进行了比较.
- 利用固态特征和元基因组分析来分析还原产品和微生物群体.
主要成果:
- Pd-MBfR实现了99%以上的Cr (VI) (1000微克L-1) 减少,将总降低到50微克L-1以下.
- 在非Pd MBfR废水中观察到明显较低的总度 (290μg L-1).
- 在Pd-MBfR中将可溶性有机-Cr(III) 复合物的形成降到最低,并促进了Cr(OH) 3沉.
- 甲基因组分析显示,由于快速的Cr (VI) 减少,对生物膜微生物群体的影响很小.
结论:
- 通过Pd-MBfR技术,可以有效地减少CrVI和降水CrOH3.
- 在MBfR中现场生成PdNP克服了H2转移效率和催化剂损失的局限性.
- 这种方法为水处理中Cr (VI) 去除提供了一个有希望的解决方案.
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