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Synthesis of hydrophobic association cationic
starch and its flocculation application on containing algae water
of Dianchi Lake
- XU Xiaojun1, LIU Xiangyi2, YANG Yuming2
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1.College of Environmental Science and Engineering, Kunming University of Science and Technology; 2.College of Environmental Science and Engineering, Kunming University of Science and Technology;Southwest Forestry College;
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Published |
05 Jun 2008 |
Issue Date |
05 Jun 2008 |
Abstract
The hydrophobic formation cationic starch (PSOAMDA) was prepared from starch (St), octadecyl acrylate (OA), acrylamide (AM) and dimethyl diallyl ammonium chloride (DMDAAC) by means of inverse suspension polymerization with redox initiator. Water with algae from Dianchi Lake was tested with PSOAMDA. Results show that when the molar ratio of St: AM: DMDAAC: OA is 4:8:1.5:0.6 and the reaction temperature is 40°C with a reaction time of 3 h, the monomer conversion yield, graft percentage and cationic degree is 92.4%, 63.8% and 7.3%, respectively, and M? = 3.26 × 106 g/vmol. It had been found from the flocculation of disposed water with algae from Dianchi Lake that the transparency and COD elimination reach to 93.5% and 70.3%, respectively, with 15 mg/L PSOAMDA and at pH 6, vs. 91.3% and 69.2% obtained with the commercial cationic polyacrylamide (PAM-C). When PSOAMDA dosage is 10–25 mg/L and the pH of aqueous solution is 6–10, the flocculation performance is well capable of dealing with the water with algae from Dianchi Lake.
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XU Xiaojun, LIU Xiangyi, YANG Yuming.
Synthesis of hydrophobic association cationic
starch and its flocculation application on containing algae water
of Dianchi Lake. Front. Chem. China, 2008, 3(2): 166‒171 https://doi.org/10.1007/s11458-008-0032-1
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