A tale of two minerals:contrasting behaviors and mitigation strategies of gypsum scaling and silica scaling in membrane desalination  

作　　者：Tiezheng Tong Shinyun Park Yiqun Yao 

机构地区：[1]Department of Civil and Environmental Engineering,Colorado State University,Fort Collins,CO 80523,USA [2]School of Sustainable Engineering and the Built Environment,Arizona State University,Tempe,AZ 85287,USA

出　　处：《Frontiers of Environmental Science & Engineering》2025年第1期47-68,共22页环境科学与工程前沿(英文)

基　　金：supported by the National Science Foundation(Nos.2143970 and 2145627).

摘　　要：Mineral scaling represents a major constraint that limits the efficiency of membrane desalination,which is becoming increasingly important for achieving sustainable water supplies in the context of a changing climate.Different mineral scales can be formed via distinct mechanisms that lead to a significant variation of scaling behaviors and mitigation strategies.In this article,we present a comprehensive review that thoroughly compares gypsum scaling and silica scaling,which are two common scaling types formed via crystallization and polymerization respectively,in membrane desalination.We show that the differences between scale formation mechanisms greatly affect the thermodynamics,kinetics,and mineral morphology of gypsum scaling and silica scaling.Then we review the literatures on the distinct behaviors of gypsum scaling and silica scaling during various membrane desalination processes,examining their varied damaging effects on desalination efficiency.We further scrutinize the different interactions of gypsum and silica with organic foulants,which result in contrasting consequences of combined scaling and fouling.In addition,the distinctive mitigation strategies tailored to controlling gypsum scaling and silica scaling,including scaling-resistant membrane materials,antiscalants,and pretreatment,are discussed.We conclude this article with the research needs of attaining a better understanding of different mineral scaling types,aiming to inspire researchers to take scale formation mechanism into consideration when developing more effective approaches of scaling control in membrane desalination.

关 键 词：Membrane desalination Membrane scaling Gypsum scaling Silica scaling Scaling mechanism Scaling mitigation 

分 类 号：O64[理学—物理化学]