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Ultrafiltration membrane fouling induced by humic acid with typical inorganic salts
Ma, Baiwen; Ding, Yanyan; Li, Wenjiang; Hu, Chengzhi; Yang, Min; Liu, Huijuan; Qu, Jiuhui
2018-04-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume197Pages:793-802
SubtypeArticle
AbstractSevere ultrafiltration (UF) membrane fouling is always induced by humic acid (HA). However, little attention has been paid to the influence of inorganic salts, and even the studies related have been limited to only a single kind of salt. In addition, the concentration of the inorganic salts reported in previous studies is much high. Herein, the effect of HA on UF membrane performance was investigated in the presence of typical inorganic salts, with concentrations similar to those in natural waters or actually used in most current water plants. The results showed that membrane performance was influenced little by monovalent inorganic salts (NaCl and KCl), while divalent inorganic salts (CaCl2 and MgCl2) could exacerbate the membrane fouling. For trivalent inorganic salts (AlCl3 center dot 6H(2)O and FeCl3 center dot 6H(2)O), floc adsorption was the dominant HA removing mechanism, and AlCl3 center dot 6H(2)O behaved better than FeCl3 center dot 6H(2)O. Relating to the floc properties, severe membrane fouling occurred with low dosage, while it was mitigated with high dosage. Compared with the trivalent inorganic salts, more severe membrane fouling was caused by divalent inorganic salts. Additionally, little synergistic or inhibitory effect occurred with mixtures of divalent inorganic salts and trivalent inorganic salts. Furthermore, analysis with the classical fouling models showed that cake filtration was the main fouling mechanism with/without inorganic salts. Based on the findings, we believe these different HA behaviors exhibited during coagulation process with inorganic salts will have a large potential application in UF membrane fouling alleviation in water treatment. (C) 2018 Elsevier Ltd. All rights reserved.
Department中国科学院饮用水科学与技术重点实验室
KeywordUF membrane Humic acid Typical inorganic salts Fouling mechanisms
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/41432
Collection中国科学院饮用水科学与技术重点实验室
Recommended Citation
GB/T 7714
Ma, Baiwen,Ding, Yanyan,Li, Wenjiang,et al. Ultrafiltration membrane fouling induced by humic acid with typical inorganic salts[J]. CHEMOSPHERE,2018,197:793-802.
APA Ma, Baiwen.,Ding, Yanyan.,Li, Wenjiang.,Hu, Chengzhi.,Yang, Min.,...&Qu, Jiuhui.(2018).Ultrafiltration membrane fouling induced by humic acid with typical inorganic salts.CHEMOSPHERE,197,793-802.
MLA Ma, Baiwen,et al."Ultrafiltration membrane fouling induced by humic acid with typical inorganic salts".CHEMOSPHERE 197(2018):793-802.
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