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Water Science & Technology—WST Vol 59 No 6 pp 1085–1091 © IWA Publishing 2009 doi:10.2166/wst.2009.046 Removal of algal blooms in freshwater using magnetic polymerDan Liu, Fengting Li and Bingru ZhangCollege of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse Study, Tongji University, Shanghai 200092, China E-mail: dliu1982 @hotmail.comABSTRACT Removal of algal blooms in freshwater using magnetic polymer was studied by magnetic field. Results showed that magnetic polymer at optimal loadings (4 mg/Lferroferric oxide modified with 1.6 mg/Lchitosan) could remove over 99% algal cells; meanwhile, the removal efficiency of COD, total nitrogen and phosphorus was found to be 85.0%, 73.9% and 28.7% respectively. Furthermore, effects of ionic strength, pH and cell concentration on the removal of algal cells were analyzed: ionic strength had a negative effect on the removal efficiency which increased with the increase of cell concentration and reached a maximum at pH 7.0. Keywords: algae; chitosan; flocculation; magnet; polymer eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00) All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment |
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