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Studies on Anion Exchange Membrane and Interface Properties by Electrochemical Impedance Spectroscopy: The Role of pH
Zhang, Wenjuan; Cheng, Wei; Tufa, Ramato Ashu; Liu, Caihong; Aili, David; Chanda, Debabrata; Chang, Jing; Wang, Shaopo; Zhang, Yufeng; Ma, Jun
2021-10
Source PublicationMEMBRANES
Volume9Issue:5Pages:-
AbstractThe modules of ultrafiltration (UF) membrane always occupy a fixed position during filtration. This results in a gradual aggravation of membrane fouling because of the continuous pollutants deposition. However, it is known that the cake layer is composed of loosely hydrolyzed flocs. Therefore, in this study, the rotation concept of membrane-module was investigated in conjunction with the integrated floc (Fe-based)-UF process. We found that the Fe-based flocs can be easily peeled off the membrane surface during rotation, and the UF membrane fouling was alleviated, particularly with spiral module rotation because of the strong shearing force induced. The fouling behavior after spiral module rotation was similar for different floc dosages because of the looseness cake layer formed. The applied computational fluid dynamics model showed that a greater spiral rotation height corresponded to a larger water velocity distribution and stronger shearing force in the membrane tank, and this resulted in a reduction in the fouling degree due to the thinner cake layer formed. Moreover, in comparison with alkaline conditions, a slightly more severe fouling degree was observed under acidic conditions because of the induced denser cake layer with smaller Fe-based floc sizes; however, a significantly higher humic-acid removal efficiency was observed. In addition, UF membrane performed well with river water samples taken from the South-to-North water diversion project in China (Beijing), thereby indicating the rotating module potential application in membrane-based drinking water treatment.
Department中国科学院饮用水科学与技术重点实验室
KeywordUltrafiltration Flocs Integrated progress Rotation of module Fouling reduction
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/46924
Collection中国科学院饮用水科学与技术重点实验室
Affiliation1.Tianjin Chengjian Univ, Tianjin Key Lab Aquat Sci & Technol, Sch Environm & Municipal Engn, Tianjin 300384, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
3.Tech Univ Denmark, Dept Energy Convers & Storage, Bldg 310, DK-2800 Lyngby, Denmark
4.Chongqing Univ, Minist Educ, Key Lab Ecoenvironm Three Gorges Reservoir Reg, Coll Environm & Ecol, Chongqing 400044, Peoples R China
5.Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China
6.[Ma, Jun
7.Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Wenjuan,Cheng, Wei,Tufa, Ramato Ashu,et al. Studies on Anion Exchange Membrane and Interface Properties by Electrochemical Impedance Spectroscopy: The Role of pH[J]. MEMBRANES,2021,9(5):-.
APA Zhang, Wenjuan.,Cheng, Wei.,Tufa, Ramato Ashu.,Liu, Caihong.,Aili, David.,...&Ma, Jun.(2021).Studies on Anion Exchange Membrane and Interface Properties by Electrochemical Impedance Spectroscopy: The Role of pH.MEMBRANES,9(5),-.
MLA Zhang, Wenjuan,et al."Studies on Anion Exchange Membrane and Interface Properties by Electrochemical Impedance Spectroscopy: The Role of pH".MEMBRANES 9.5(2021):-.
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