Enhanced gypsum scaling by organic fouling layer on nanofiltration membrane: Characteristics and mechanisms

Water Research
Jiaxuan WangXiaoting Zhang

Abstract

To investigate how the characteristics of pregenerated organic fouling layers on nanofiltration (NF) membranes influence the subsequent gypsum scaling behavior, filtration experiments with gypsum were carried out with organic-fouled poly(piperazineamide) NF membranes. Organic fouling layer on membrane was induced by bovine serum albumin (BSA), humic acid (HA), and sodium alginate (SA), respectively. The morphology and components of the scalants, the role of Ca(2+) adsorption on the organic fouling layer during gypsum crystallization, and the interaction forces of gypsum on the membrane surface were investigated. The results indicated that SA- and HA-fouled membranes had higher surface crystallization tendency along with more severe flux decline during gypsum scaling than BSA-fouled and virgin membranes because HA and SA macromolecules acted as nuclei for crystallization. Based on the analyses of Ca(2+) adsorption onto organic adlayers and adhesion forces, it was found that the flux decline rate and extent in the gypsum scaling experiment was positively related to the Ca(2+)-binding capacity of the organic matter. Although the dominant gypsum scaling mechanism was affected by coupling physicochemical effects, the controlling fac...Continue Reading

References

Jan 14, 2004·Environmental Science & Technology·Eric M V Hoek, Menachem Elimelech
Oct 6, 2004·Environmental Science & Technology·Qilin Li, Menachem Elimelech
Mar 3, 2006·Environmental Science & Technology·Sangyoup Lee, Menachem Elimelech
Jan 24, 2007·Water Research·Sangyoup Lee, Menachem Elimelech
Feb 16, 2010·Environmental Science & Technology·Baoxia Mi, Menachem Elimelech

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Citations

Mar 30, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Xinying Su, Zhigang Zhang
Jul 29, 2019·Environmental Science and Pollution Research International·Dachao LinGuibai Li
Oct 21, 2020·Membranes·Krzysztof MitkoKrzysztof Piotrowski
Apr 29, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Teresa F MastropietroDonatella Armentano
Nov 18, 2017·Environmental Science & Technology·Yan-Fang GuanHan-Qing Yu
Nov 18, 2021·Environmental Science & Technology·Meng WangDebora F Rodrigues

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