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Study on membrane fouling in ceramic filtration of phosphorus concentrate based on xDLVO theory
Received date: 2023-05-25
Online published: 2024-06-20
The membrane fouling behavior of alumina ceramic membrane in the process of phosphorus concentrate filtration was analyzed using xDLVO（Extend Derjaguin Landau Verweek Overbeek） theory.Based on xDLVO theory，the interaction energy between primary membrane（N-AM），cleaning regeneration membrane（C-AM） and phase out membrane（F-AM） and pollutants（MP）（mixture of fluorapatite，dolomite and silica） was calculated.The contribution of Van der Waals interaction energy（LW），electrostatic interaction energy（EL） and polar interaction energy（AB） in the process of membrane pollution was analyzed.The results indicated that AB dominated the N-AM membrane，exhibiting a repulsive effect，which was beneficial for alleviating membrane fouling；for C-AM and F-AM membranes，the LW interaction energy was the main interaction energy，manifested as attraction，exacerbating membrane fouling.In all pollution processes，the difference in Van der Waals interaction energy was relatively small，while the absolute value of electrostatic interaction energy was extremely small and its contribution was weak.The membrane fouling experiment and calculation results were consistent，indicating that the xDLVO theory had guiding significance for the analysis of membrane fouling behavior and membrane fouling control in the membrane separation process of phosphorus concentrate.
XUE Jin , TIAN Mengkui , LIU Hai . Study on membrane fouling in ceramic filtration of phosphorus concentrate based on xDLVO theory[J]. Inorganic Chemicals Industry, 2024 , 56(6) : 55 -60 . DOI: 10.19964/j.issn.1006-4990.2023-0285
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