Impact of the interaction between aquatic humic substances and algal organic matter on the fouling of a ceramic microfiltration membrane

Zhang, X, Fan, L and Roddick, F 2018, 'Impact of the interaction between aquatic humic substances and algal organic matter on the fouling of a ceramic microfiltration membrane', Membranes, vol. 8, no. 1, pp. 1-10.


Document type: Journal Article
Collection: Journal Articles

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Title Impact of the interaction between aquatic humic substances and algal organic matter on the fouling of a ceramic microfiltration membrane
Author(s) Zhang, X
Fan, L
Roddick, F
Year 2018
Journal name Membranes
Volume number 8
Issue number 1
Start page 1
End page 10
Total pages 10
Publisher MDPIAG
Abstract The influence of the interaction between aquatic humic substances and the algal organic matter (AOM) derived from Microcystis aeruginosa on the fouling of a ceramic microfiltration (MF) membrane was studied. AOM alone resulted in a significantly greater flux decline compared with Suwannee River humic acid (HA), and fulvic acid (FA). The mixture of AOM with HA and FA exhibited a similar flux pattern as the AOM alone in the single-cycle filtration tests, indicating the flux decline may be predominantly controlled by the AOM in the early filtration cycles. The mixtures resulted in a marked increase in irreversible fouling resistance compared with all individual feed solutions. An increase in zeta potential was observed for the mixtures (becoming more negatively charged), which was in accordance with the increased reversible fouling resistance resulting from enhanced electrostatic repulsion between the organic compounds and the negatively-charged ceramic membrane. Dynamic light scattering (DLS) and size exclusion chromatography analyses showed an apparent increase in molecular size for the AOM-humics mixtures, and some UV-absorbing molecules in the humics appeared to participate in the formation of larger aggregates with the AOM, which led to greater extent of pore plugging and hence resulted in higher irreversible fouling resistance.
Subject Wastewater Treatment Processes
Keyword(s) Algal organic matter
Ceramic membrane
Fouling
Fulvic acid
Humic acid
Microfiltration
DOI - identifier 10.3390/membranes8010007
Copyright notice © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
ISSN 2077-0375
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