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Li L.,Wuhan Institute of Technology | Wang G.,Hubei Key Laboratory of Coal Conversion and New Carbon Materials | Wang G.,Wuhan University of Science and Technology | Li W.,Hubei Key Laboratory of Coal Conversion and New Carbon Materials | And 11 more authors.
Advanced Materials Research | Year: 2012

A series of inorganic-organic hybrid flocculants were synthesized by using aluminum chloride, ferric chloride, polyacrylamide (neutral & cationic) and polydimethyldiallyl ammonium chloride as raw materials. Effect of mass ratio of inorganic and organic polymeric flocculant, basicity, categories of inorganic and organic polymeric flocculant on the regeneration of coking wastewater was investigated. The results showed that the optimum conditions of preparation the title hybrid flocculant were: mass ratio 100, basicity 1.5, inorganic polymeric flocculant PAFC and organic polymeric flocculant CPAM. The removals of CODCr and chroma were 43.48% and 71.88%, respectively, when the pH of raw water was approximately 7 and the dose of flocculant was 360 mgL -1. Source


Wang G.,Hubei Key Laboratory of Coal Conversion and New Carbon Materials | Wang G.,Wuhan University of Science and Technology | Liu Q.,Hubei Key Laboratory of Coal Conversion and New Carbon Materials | Liu Q.,Wuhan University of Science and Technology | And 10 more authors.
Advanced Materials Research | Year: 2012

Under conditions of microwave (MW) radiation and open-vessel reflux, acrylamide (AM) and diallyldimethylammonium chloride (DADMAC) were grafted to corn starch (St) by aqueous solution polymerization in air. Potassium persulfate (KPS) in conjunction with continuous MW were utilized to initiate the above graft reaction. A representative copolymer of St-graftpoly( AM-DADMAC) was characterized by Fourier transform infrared spectroscopy, elemental analysis, scanning electron microscopy and energy disperse spectroscopy. Microwave power, radiation time, KPS concentration and AM/DADMAC molar ratio were investigated to examine their effects on grafting efficiency (GE) and cationic degree (CD). The optimal conditions under investigation were microwave power 500 W, radiation time 150 s, KPS concentration 2 mmol L -1, AM/DADMAC molar ratio 9:1. The GE and CD obtained were 68.6% and 0.16 mmol g -1, respectively. Source

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