Liu Dan, Li Fengting, Zhang Bingru
College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse Study, Tongji University, Shanghai 200092, China.
Water Sci Technol. 2009;59(6):1085-91. doi: 10.2166/wst.2009.046.
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.
利用磁场研究了磁性聚合物去除淡水中藻华的效果。结果表明，最佳负载量（4mg/L的四氧化三铁用1.6mg/L壳聚糖改性）的磁性聚合物可去除超过99%的藻类细胞；同时，化学需氧量、总氮和磷的去除效率分别为85.0%、73.9%和28.7%。此外，分析了离子强度、pH值和细胞浓度对藻类细胞去除的影响：离子强度对去除效率有负面影响，去除效率随细胞浓度的增加而提高，并在pH值为7.0时达到最大值。
