Impact of conventional water treatment coagulants on mineral scaling in RO desalting of brackish water / Myung-man Kim in Industrial & engineering chemistry research, Vol. 48 N° 6 (Mars 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 6 (Mars 2009) . - pp. 3126–3135 Titre : Impact of conventional water treatment coagulants on mineral scaling in RO desalting of brackish water Type de document : texte imprimé Auteurs : Myung-man Kim, Auteur ; James Au, Auteur ; Anditya Rahardianto, Auteur Année de publication : 2009 Article en page(s) : pp. 3126–3135 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Coagulants Brackish water Bulk crystallization Reverse osmosis membrane Résumé : The potential impact of coagulants on mineral scaling in reverse osmosis (RO) feed treatment of brackish water was assessed experimentally, with respect to calcium sulfate and barium sulfate scaling potential, via a bulk crystallization and membrane scaling tests. The scale suppression effectiveness of six commercial antiscalants was first ranked based on measured observed bulk crystallization induction times. Bulk crystallization tests with three standard coagulants (ACH, FeCl3, and polyDADMAC), when used independently, demonstrated retardation of the observed crystallization induction time. However, along with an antiscalant dosing, antiscalant scale suppression was significantly reduced and scaling occurred at the same or greater severity relative to the additive-free feed solution. RO membrane scaling tests also indicated that, when the coagulants were present, antiscalant effectiveness was significantly reduced, consistent with the expectation based on bulk crystallization tests. Although the coagulants demonstrated a slight scale suppression quality in bulk crystallization tests at low dosages ( En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800937c [article] Impact of conventional water treatment coagulants on mineral scaling in RO desalting of brackish water [texte imprimé] / Myung-man Kim, Auteur ; James Au, Auteur ; Anditya Rahardianto, Auteur . - 2009 . - pp. 3126–3135. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 6 (Mars 2009) . - pp. 3126–3135 Mots-clés : Coagulants Brackish water Bulk crystallization Reverse osmosis membrane Résumé : The potential impact of coagulants on mineral scaling in reverse osmosis (RO) feed treatment of brackish water was assessed experimentally, with respect to calcium sulfate and barium sulfate scaling potential, via a bulk crystallization and membrane scaling tests. The scale suppression effectiveness of six commercial antiscalants was first ranked based on measured observed bulk crystallization induction times. Bulk crystallization tests with three standard coagulants (ACH, FeCl3, and polyDADMAC), when used independently, demonstrated retardation of the observed crystallization induction time. However, along with an antiscalant dosing, antiscalant scale suppression was significantly reduced and scaling occurred at the same or greater severity relative to the additive-free feed solution. RO membrane scaling tests also indicated that, when the coagulants were present, antiscalant effectiveness was significantly reduced, consistent with the expectation based on bulk crystallization tests. Although the coagulants demonstrated a slight scale suppression quality in bulk crystallization tests at low dosages ( En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800937c

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