Preparation of PAC-PDMDAAC hybrid flocculant by response surface method and its characterization
Author(s): JIANG Shaojie, FENG Xinrui, LI Xiao’en, JIANG Shilong, Key Laboratory of the Three Gorges Reservoir Region’s Eco-environments, Ministry of Education, Chongqing University
Pages: 731-736
Year: 2014 Issue: 2
Journal: Journal of Chemical Industry and Engineering(China)
Keyword: coagulation; preparation; optimization; response surface methodology; organic-inorganic hybrid;
Abstract: Polyaluminum chloride(PAC)-poly(dimethyl diallyl ammonium chloride)(PDMDAAC),a new type of organic-inorganic hybrid flocculant,was prepared by using KH570 as modifying agent and ammonium persulfate as initiator.The Box-Behnken mathematical relational model between intrinsic viscosity and affecting factors was established,and the technology of preparing PAC-PDMDAAC was optimized.The optimum preparation conditions were:DMDAAC mass fraction 33%,initiator mass fraction 0.6%,reaction temperature 64℃ and reaction time 3 h.Conductivity measurement,FT-IR and TGA showed covalent bond between PAC and PDMDAAC.SEM photos revealed that the PAC-PDMDAAC hybrid flocculant had loose structure and large particle size,which made it easier to play bridging and adsorption roles.
Pages: 731-736
Year: 2014 Issue: 2
Journal: Journal of Chemical Industry and Engineering(China)
Keyword: coagulation; preparation; optimization; response surface methodology; organic-inorganic hybrid;
Abstract: Polyaluminum chloride(PAC)-poly(dimethyl diallyl ammonium chloride)(PDMDAAC),a new type of organic-inorganic hybrid flocculant,was prepared by using KH570 as modifying agent and ammonium persulfate as initiator.The Box-Behnken mathematical relational model between intrinsic viscosity and affecting factors was established,and the technology of preparing PAC-PDMDAAC was optimized.The optimum preparation conditions were:DMDAAC mass fraction 33%,initiator mass fraction 0.6%,reaction temperature 64℃ and reaction time 3 h.Conductivity measurement,FT-IR and TGA showed covalent bond between PAC and PDMDAAC.SEM photos revealed that the PAC-PDMDAAC hybrid flocculant had loose structure and large particle size,which made it easier to play bridging and adsorption roles.
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