| 标题 |
 Cleaning mechanism of gypsum scaling in hydrophobic porous membranes 疏水性多孔膜中石膏结垢的清除机理
相关领域
石膏
膜
多孔性
机制（生物学）
缩放比例
化学工程
材料科学
化学
工程类
复合材料
物理
几何学
数学
生物化学
量子力学
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| 网址 | |
| DOI | |
| 其它 |
Abstract Mineral scaling is one of the major challenges for membrane distillation in concentrating high-salinity brine. This work first investigated the characteristic of CaSO4 scaling, then explored different cleaning reagents to evaluate their efficiencies and mechanisms. By analyzing the SEM and EDX mapping images, the CaSO4 scaling process could be divided into surface and pore scaling stages. Three cleaning solutions, i.e., commercial detergent (20 %), EDTA-4Na (0.05 M), and MgCl2 (0.8 M), were chosen for their high CaSO4 solubility (0.7 g CaSO4 per 100 g H2O). At the surface scaling stage, three cleaning solutions exhibited excellent removal of CaSO4 scaling with approximately similar 96 % cleaning efficiencies. However, at the pore scaling stage, only the commercial detergent showed high efficiency (89 %). |
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