开发用酸增强膜去除纳米塑料:多种情景和机制探索
Mengna Li1, Guohe Huang1, Shuguang Wang2
1Environmental Systems Engineering Program, University of Regina, Regina, Saskatchewan S4S 0A2, Canada; China-Canada Center of Energy, Environment and Sustainability Research, UR-SDU, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.
Journal of hazardous materials
|June 4, 2025
概括
一种新的酸功能化PVDF (HAPF) 膜有效地从水中去除99.5%以上的纳米塑料 (NP). 与传统膜相比,这种先进的膜显示出优越的水流和污染阻力.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 纳米塑料 (NP) 是越来越普遍的环境污染物,比微塑料 (MP) 具有更大的毒性风险.
- 现有的膜技术虽然对MP有效,但需要进一步研究有效的NP去除和了解去除机制.
- 开发先进的材料对于解决废水中的NP污染至关重要.
研究的目的:
- 开发和表征一种新的酸功能化PVDF (HAPF) 膜,用于增强纳米塑料的去除.
- 为了评估HAPF膜在水流量,NP排斥和污染抵抗方面的性能.
- 研究HAPF膜与纳米塑料之间的相互作用机制.
主要方法:
- 采用一步合成方法,在特定度和pH值下使用酸 (HAP) 制造HAPF膜.
- 在各种条件下测试了HAPF膜的水流性能和聚乙烯 (PS) NP的排斥.
- 使用XDLVO理论分析了膜和NP之间的相互作用力,并执行污垢清洁周期以评估耐用性.
主要成果:
- 优化的HAPF膜实现了高水流量 (4376.44 LMH) 和>99.5%的PSNP排斥.
- 膜在纯水中表现良好,但在表面功能化的NP,pH变化和MgSO4等共存污染物下,流量下降.
- 在长期过过程中,HAPF膜表现出明显较低的阻力 (Rm和Rf) 和高流量回收率 (92.94%) 在多个循环中,水流量比原始PVDF膜高18.9倍.
结论:
- 开发的HAPF膜为先进的水处理提供了有前途的解决方案,因为它具有高的NP去除效率和出色的污染抵抗力.
- 该研究强调了功能化膜在解决纳米塑料污染挑战方面的潜力.
- 需要进一步的研究来优化膜在复杂的废水条件下的性能.
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