结垢
膜污染
化学
废水
膜
超滤(肾)
腐植酸
Zeta电位
过滤(数学)
盐度
色谱法
化学工程
环境化学
膜技术
环境工程
环境科学
有机化学
生物化学
纳米颗粒
生态学
肥料
数学
工程类
统计
生物
作者
Weiwei Cai,Jingyu Zhang,Yan Li,Justin Chen,Wenjie Xie,Jingwei Wang
出处
期刊:Chemosphere
[Elsevier]
日期:2022-01-01
卷期号:287: 132057-132057
被引量:14
标识
DOI:10.1016/j.chemosphere.2021.132057
摘要
High-salinity organic wastewater usually consists of diverse highly concentrated ions such as Na+, Ca2+ and Al3+ etc., which may significantly influence the fouling propensity when membrane technique is employed for contaminants removal. The current work investigated the effects of high salinity especially high-concentration Na+, Ca2+ and Al3+ on UF fouling characteristics, where 2 M Na+ and 0.5–1.0 M Ca2+ or Al3+ were applied according to the general composition of high-salinity wastewater. The results demonstrated that the presence of high-concentration Na+ alone benefited the ultrafiltration of bovine serum albumin (BSA) solution, but posed adverse effects on the ultrafiltration of humic acid (HA) solution. Further addition of Ca2+ or Al3+ on the basis of Na+ was found to aggravate the development of BSA fouling. Such differentiated behaviors were further elucidated by the comprehensive fouling characterizations in terms of foulant properties, specific resistances, filtration modelling and fouling layer observations. Correlation analysis suggested that irreversible fouling had strong relationship with Al3+ addition, while reversible fouling seemed to be primarily influenced by foulant size. Meanwhile, membrane rejection in the presence of various salts remarkably decreased, which was negatively correlated with zeta potential. Consequently, this study should shed light on the membrane fouling formation for treating high-salinity organic wastewater using membrane techniques.
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