【作者】 陈国华； 孙明昆； 高从楷； 苗晶； 黄瑞华； 董婷婷； 王娟； 孙红伟； 陈堯； 高复生；

【Author】 Chen-Guohua,Sun-Mingkun,Gao-Congjie,Miao_Jing,Huang-Ruihua,Dong-Tingting,Wa ng-Juan,Sun-Hongwei,Chen-Yao,Gao-Fusheng College of chemistry and chemical Engineering,Ocean university of china,266100,Qingdao

【机构】 中国海洋大学化学化工学院；

【摘要】 <正>纳滤是一种截留分子量在200-1000之间,截留性能介于反渗透和超滤之间以压力驱动的膜分离技术,由于其操作压力低,既能有效分离中性有机物小分子,又能通过库仓静电作用分离直径小于其孔径的高价离子和低价离子,因此在海水与若咸水淡化预处理,高矿化度水的软化,物质分离与纯化,地面水或中水的深度净化等方面都有重要的应用。甲壳素衍生物由于无毒性、与生物相容性,更多还原

【Abstract】 About 30 types of novel composite nanofiltration{NF)membrane were prepared by coating and cross-linking,where the water-soluble chitins derivatives as the active layer material,the polysulfone(PSF)UF membrane or polyacrylonitrile(PAN)UF membrane as the support layer,and the cross-linking agent using epichlorohydrin(ECH),toluene diisocyanate(TDI),sulfuric acid,and mixed anhydride etc.,respectively.The results indicated that the resulting membrane contained the active layermaterial of chitosan or querternized chitosan was positively charged but the other membranes were negative charged.The molecular weight cut-off(MWCO)varied from 210Da to900Da.The electrolyte solutions(1000mg/l) retention sequence of R(Na2SO4)>R(NaCl)>R(MgSO4)>R(MgCl2) for the negative charged membrane.On the contrary,the salt solution(1000mg/l) retention sequence of R(MgCl2)>R(MgSO4)>R(NaCl)>R(Na2SO4) or R(MgCl2)>R(NaCl)>R(MgSO4)>R(Na2S04) for the positively charged membrane.The resulting membranes were used for treatment wastewater including life wastewater,the fermentation effluent from awine factory< the textile wastewater< the wastrwater from the production of sodium alginate and pretreatment of seawater desalination.更多还原