Revisiting scaling of calcium sulfate in membrane distillation: Uncertainty of crystal-membrane interactions

Wang，Yewei; Liu，Jie; Li，Zhuo; Liu，Xin; Li，Weiyi

2023-07-01

10.1016/j.watres.2023.120060

Water Research   影响因子和分区

0043-1354

1879-2448

Scaling of calcium sulfate (CaSO) is a stumbling block to the development of membrane distillation (MD), which holds promise for the treatment of saline water/wastewater. Despite increasing efforts made to understand the scaling behavior of CaSO in a process of MD and thereby develop strategies for mitigating the negative effects, considerable uncertainty remains about occurrence of the wetting and structural damage that could result from the strong crystal-membrane interactions. This study combined experimental and theoretical approaches to corroborate that a higher degree of supersaturation could be achieved by concentrating the CaSO in the feed at a faster rate; the elevated supersaturation would be in favor of exerting substantially high crystallization pressure on the membrane structures. In particular, the theoretical analysis established two dimensionless groups for measuring the relative importance of the concentration effect and quantifying the essential role played by the crystalline growth, respectively. In addition to alleviating the uncertainty, this study would be beneficial to the design of MD processes with improved scaling resistance.

Calcium sulfate Concentration effect Crystal-membrane interactions Crystallization model Membrane distillation Scaling-induced wetting

SCI ; EI

英语

NI论文

第一 ; 通讯

National Natural Science Foundation of China[21878140];

Engineering ; Environmental Sciences & Ecology ; Water Resources

Engineering, Environmental ; Environmental Sciences ; Water Resources

WOS:001001237300001

PERGAMON-ELSEVIER SCIENCE LTD

20232114114769

Crystals ; Distillation ; Driers (materials) ; Membranes ; Saline water ; Supersaturation ; Water treatment ; Wetting

Water Resources:444 ; Water Treatment Techniques:445.1 ; Physical Chemistry:801.4 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Inorganic Compounds:804.2 ; Crystalline Solids:933.1 ; Materials Science:951

ENVIRONMENT/ECOLOGY

2-s2.0-85159573106

Scopus

School of Environmental Science and Engineering,Southern University of Science and Technology,China

Wang，Yewei,Liu，Jie,Li，Zhuo,et al. Revisiting scaling of calcium sulfate in membrane distillation: Uncertainty of crystal-membrane interactions[J]. Water Research,2023,239.

Wang，Yewei,Liu，Jie,Li，Zhuo,Liu，Xin,&Li，Weiyi.(2023).Revisiting scaling of calcium sulfate in membrane distillation: Uncertainty of crystal-membrane interactions.Water Research,239.

Wang，Yewei,et al."Revisiting scaling of calcium sulfate in membrane distillation: Uncertainty of crystal-membrane interactions".Water Research 239(2023).