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:perature is 40℃ 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 Mη=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.
基金项目
Environmental Science arid Engineering Innovation Fund of the Talent Co-cultivation of Yunnan Province()
NETL
NSTL
万方数据