有效和低毒性:一种使用过氧硫酸盐催化化处理的膜清洗方法
Haoliang Xiao1, Zhuqi Chen2, Jiaqi Ding3
1School of Environmental Science and Engineering, Key Laboratory of Water & Wastewater Treatment (MOHURD), Hubei Provincial Engineering Research Center for Water Quality Safety and Pollution Control, Huazhong University of Science and Technology, Wuhan 430074, China.
Journal of hazardous materials
|October 25, 2023
概括
一个新的过氧单硫酸盐和化物 (PMS/Cl-) 清洁系统有效地从聚硫 (PES) 膜中去除不可逆转的酸污垢. 这种环保方法恢复了膜的性能,损伤最小,毒性低于传统的低化物处理方法.
科学领域:
- 水处理技术水处理技术.
- 膜科学与工程 膜科学与工程
- 环境化学环境化学
背景情况:
- 化学膜清洁在去除不可逆转的污染而不会损坏膜材料方面面临着挑战.
- 传统的低化物清洁产生有毒的化副产品,造成环境和健康风险.
- 酸污染是水处理中常见的问题,降低了膜效率.
研究的目的:
- 开发和评估一种新型的清洁系统,使用过氧硫酸盐和 (PMS/Cl-),用于不可逆转的酸杂聚硫 (PES) 膜.
- 与低化物相比,评估PMS/Cl-系统的清洁效率,对膜性能的影响以及环境安全.
- 为了阐明在PMS/Cl-清洁过程中的污染物脱落机制.
主要方法:
- 将多氧硫酸盐和化物 (PMS/Cl-) 溶液组合应用于不可逆转的酸污染的PES膜.
- 清洗前后的膜性能 (流量回收,电阻去除) 的表征.
- 通过多个清洗周期分析膜表面特性和稳定性.
- 使用3D光光谱学研究物脱落机制.
- 通过化副产品分析和急性毒性试验进行毒性评估 (光细菌 T3).
主要成果:
- 在PMS/Cl-清洗1小时后,实现了94%的流量回收和96%的阻力去除.
- 清洗后的膜表面性能与原始膜相似,表明材料的影响最小.
- 在多个污染和清洁周期中证明了稳定的分离性能.
- 确定了PMS催化化作为主要的污染物脱落机制.
- 与低化物相比,具有明显较低的毒性,减少化副产品和较低的急性毒性.
结论:
- PMS/Cl-系统提供了一种高效和环保的解决方案,用于在水处理中不可逆转地去除有机污染物.
- 这种新的清洁方法最大限度地减少了膜损伤,并减少了有毒副产品的形成.
- 在水净化过程中,PMS/Cl-系统对实际应用非常有前途.
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