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对比纳米过和膜蒸的混合缩放模式和机制

Libing Zheng¹, Qiyang Wu², Mathias Ulbricht³

¹State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen, Essen 45117, Germany; Laboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Chemical Engineering, KU Leuven, Leuven 3001, Belgium.

|May 15, 2024

概括

这项研究调查了高盐废水淡化,该研究对比了真空膜蒸 (VMD) 和纳米过 (NF) 中的缩放. 它揭示了酸盐和有机物如何影响缩放机制,这对于零液体排放 (ZLD) 应用至关重要.

科学领域:

环境科学环境科学
化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学

背景情况:

超的废水对海水淡化和零液体排放 (ZLD) 构成挑战.
膜缩放显著影响淡化过程的效率,如真空膜蒸 (VMD) 和纳米过 (NF).
了解混合缩放机制对于优化这些技术至关重要.

研究的目的:

调查和对比热驱动的VMD和高盐废水的压力驱动的NF中的混合缩放机制.
阐明酸盐和有机物在VMD和NF缩放中的作用.
为扩展减缓策略提供见解,以支持ZLD.

主要方法:

在超的条件下对VMD和NF的缩放进行比较分析.
确定主导的缩放机制 (批量与表面结晶).
评估酸盐和有机物对缩放动力学和组成的影响.

主要成果:

大量结晶主导了VMD缩放,而表面结晶和孔隙阻断则是NF缩放的特征.
酸盐通过-水合物 (MSH) 形成增强了NF缩放 (75%更快的流量下降),但延迟了VMD批量结晶.
有机物质延迟了VMD和NF的批量结晶,但促进了NF中的CaCO3缩放;共存加剧了缩放.

结论:

在VMD和NF之间,缩放机制显著不同,受操作条件和污染物的影响.
酸盐和有机物质在膜缩放中起着复杂的,有时是对立的作用.
对这些混合缩放机制的洞察对于开发高盐废水处理和ZLD的有效策略至关重要.

关键词:

超的废水是超的废水.膜蒸的蒸方式混合缩放混合缩放纳米过的纳米过方法酸盐是一种酸盐.

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