[Preparation of triolein-embedded CA membrane and its characteristics].
Triolein is successfully embedded into cellulose acetate (CA) by phase inversion. This prepared flat membrane can effectively remove trace lipophilic organic pollutants from water. Structure of hybrid membrane is mainly observed by scanning electron microscope (SEM). Triolein dispersion by mechanical rabbling and ultrasound are investigated. Ultrasound can more effectively strengthen triolein dispersion than mechanical rabbling. Effect of casting membrane temperature (room temperature, 0 degrees C) shows low temperature can help to forming smaller triolein droplets. In addition, interaction between triolein and CA belongs to physical mixing by the observation of FT-IR, accordingly triolein structure is not changed and adsorptive capacity for persistent organic pollutants is not affected. Triolein in hexane is analyzed by fluorometric measure. The results show that triolein is completely embedded into membrane, so it is impossible that triolein leaks into water in the process of the adsorption.
Huo
Jin-Xian
JX
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. jhqu@mail.rcees.ac.cn
Liu
Hui-Juan
HJ
Qu
Jiu-Hui
JH
Lei
Peng-Ju
PJ
Wu
Rong-Cheng
RC
D000327:Adsorption; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D004784:Environmental Monitoring; D008567:Membranes, Artificial; D008851:Micropore Filters / Q000592:standards; D014304:Triolein / Q000032:analysis / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
D008567:Membranes, Artificial; D014874:Water Pollutants, Chemical; D014304:Triolein; C005062:acetylcellulose; D002482:Cellulose