使用电子负SA/EGCG@Ti/SA/PVDF三明治膜从废水中高效地去除Cr(VI)
Jia Wen1, Wenxing Cheng2, Yaxin Zhang2
1College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China; Research Institute of Hunan University in Chongqing, Chongqing, PR China.
Journal of hazardous materials
|July 19, 2023
概括
这项研究引入了一种新型的三明治膜,使用表甲基酸盐 (EGCG) 和纳米颗粒进行有效的重金属水净化. 开发的膜显示出出色的稳定性和在废水中的物种的高去除效率.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 纳米技术纳米技术
背景情况:
- 可持续发展需要绿色,无毒的原材料来改善环境.
- 乙甲基酸盐 (EGCG) 是一种来自植物的可再生资源,为新材料合成提供了潜力.
- 在金属聚烯纳米材料的研究中存在一个研究缺口,用于有效的水净化.
研究的目的:
- 开发一种新的SA/EGCG@Ti/SA/PVDF (SESP) 三明治膜,用于清除水污染.
- 为应对纳米材料回收和金属离子浸出方面的挑战.
- 为了评估膜在去除重金属,特别是物种的效率.
主要方法:
- 通过对基酸盐 (SA),表甲基酸盐-纳米颗粒 (EGCG@Ti NPs) 和聚乙烯化物 (PVDF) 进行分层制造SESP三明治膜.
- 膜性质的表征,包括稳定性,水友性和流动性.
- 测试重金属去除效率 (Cu,Pb,Cd,Ni,Cr,VI,Cr,III) 和吸附 - 脱附周期.
主要成果:
- 该SESP膜表现出良好的热水和酸稳定性,接触角度低 (14.0-15.6°),纯水流量高 (171.40 L/m2 h).
- 膜表现出优异的Cr(VI) 拦截 (100%的效率,72.92 L/m2 h的流量) 和保持高清除效率 (>83%的模拟,100%的实际废水) 在五个周期.
- 通过包括多南效应,离子交换,化/复合,还原和静电吸引在内的去除机制,实现了同时去除Cr6和Cr3的过程.
结论:
- 新型SESP三明治膜有效地克服了纳米材料回收和金属离子漏问题.
- 膜显示出处理多种重金属,特别是物种污染的废水的巨大潜力.
- 该研究强调了金属多纳米材料在先进的水处理技术中的有希望的应用.
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