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AuthorAng, W.L.
AuthorMohammad, A.W.
AuthorBenamor, A.
AuthorHilal, N.
AuthorLeo, C.P.
Available date2021-09-07T06:16:21Z
Publication Date2016
Publication NameDesalination
ResourceScopus
ISSN119164
URIhttp://dx.doi.org/10.1016/j.desal.2016.01.010
URIhttp://hdl.handle.net/10576/22828
AbstractAntiscalants have been used to inhibit the formation of scales and reduce the risk of membrane scaling. However, issues such as the increased of biofouling tendency and contradictory observations of organic fouling propensity under the influence of antiscalants have been reported by other researchers. Such observations indicate the need for thorough understanding about the interaction between antiscalants and membrane/foulants in the solution. This study investigated the influence of antiscalant on the water characteristics and the performance of hybrid coagulation-nanofiltration membrane process for brackish water treatment. It was observed that scaling was mitigated with the addition of antiscalants but membrane fouling was exacerbated at higher dosage, probably due to the changes in foulant properties induced by antiscalants. Analysis carried out on the water showed that antiscalants altered the characteristics of the foulants and formed precipitates with calcium/aluminum and iron (from coagulant) ions, which eventually deposited as foulant layer on the membrane surface. This was proven with the existence of phosphorous element on the membrane surface using SEM-EDX. The findings demonstrated how the antiscalants altered the water characteristics and provided insight into the reactivity of antiscalants present in different concentrations, which could be used to interpret the contradicting findings from other researchers.
SponsorThis paper was made possible by NPRP grant #[5-1425-2-607] from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the author[s]. The authors also wish to acknowledge the Ministry of Education Malaysia for sponsoring W.L. Ang's postgraduate study via MyBrain.
Languageen
PublisherElsevier B.V.
SubjectAntiscalants
Brackish water desalination
Hybrid coagulation-membrane process
Membrane fouling
Scaling
Water treatment
TitleHybrid coagulation-NF membrane process for brackish water treatment: Effect of antiscalant on water characteristics and membrane fouling
TypeArticle
Pagination144-150
Volume Number393
dc.accessType Abstract Only


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