|
ZetaPALS相位分析光散射原理（PALS）測(cè)ζ電位應(yīng)用案例4
文獻(xiàn)名：Interactions controlling biopolymer fouling of reverse osmosis membranes
作者： Suhan Kima, Eric M.V. Hoekb
（aDepartment of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, 500-712, South Korea Tel. +82 62 970-3282; Fax +82 62 970-2434; email: suhankim@gist.ac.kr
bDepartment of Civil and Environmental Engineering, University of California, Los Angeles, CA, 90095, USA）
摘要：Laboratory experiments and model calculations were performed to elucidate the fundamental interactions that control organic fouling in reverse osmosis
(RO) processes. Bovine serum albumin and alginic acid were selected as model aquatic organic macromolecules (organic foulants). An extended Derjaguin-Landau-Verwey-Overbeek (DLVO) characterization analysis was used to elucidate mechanisms of organic matter fouling on a commercial, polyamide composite RO membrane.
Surface tension parameters derived from contact angle analyses are used to demonstrate that the apparent thermodynamic stability of macromolecules determines
and adhesive free energy between membranes and macromolecules explained the observed differences in flux decline. Further, foulant–membrane and foulant–foulant interfacial forces helped explain why hydrophilic macromolecules formed polarization layers causing minimal flux decline, while hydrophobic macromolecules
formed gel (or cake) layers that led to severe flux decline.
關(guān)鍵詞：Reverse osmosis; Organic fouling; Extended DLVO; Modeling
|
