作　　者： ; ; ; ;

机构地区： 中国海洋大学化学化工学院海洋化学理论与工程技术教育部重点实验室

出　　处： 《西南石油大学学报（自然科学版）》 2008年第1期112-115,共4页

摘　　要： 考察了一种新型荷负电羧甲基甲壳素／聚丙烯腈复合纳滤膜对污水（中水）的处理效果。结果表明：在1．0MPa、30L／h、室温下，经纳滤膜处理后，溶解态总磷、硝态和亚硝态总氮及CODCr的平均截留率分别可达70％、83％和94％以上，而色度几乎可完全去除。纳滤膜出水CODCr为3．0～10．2mg／L，达到GB3838-2002地面水Ⅰ类水质标准；硝态和亚硝态总氮（以氮计）质量浓度为2．7～3．5mg,／L，达到GB5749—85生活饮用水标准；溶解态总磷（以磷计）质量浓度为1．0～1．7mg,／L，已接近1mg／L的污水GB8978-1996Ⅱ级排放标准。提出，由于PO4^3-与水体中H^＋、Ca^2＋、Mg^2＋等阳离子较易形成缔合离子或络合离子，减弱了与荷负电的纳滤膜的库仑排斥作用，从而使其截留率小于NO3^-或NO2^-；该纳滤膜适于油田采出污水处理、污水（中水）脱磷、氮和CODCr的深度处理及含磷废水的脱磷处理。 The negative charged Carboxymethyl chitin(CM-CH)/polyacrylonitrile(PAN)composite membrane is used to treat the produced water.The results indicates that when operating pressure is 1.0MPa,flux is 30L/h,the removal rate of total soluble phosphorus,total nitrogen in NO3-and NO2-and CODCr are above 70%,83% and 94% respectively,and the chroma is almost entirely disappeared.The concentration of CODCr,total nitrogen in NO3-and NO2-and total soluble phosphorus in the permeation feed are 3.0-10.2mg/L,2.7-3.5mg/L and 1.0-1.4mg/L respectively,which have reached or approached the GB I standard.It is put forward that PO43-is prone to be associative or complexing ions with H+,Ca2+,Mg2+ which weaken coulomb repulsion strength between the negative charged nanofiltration membrane and the ions,so the removal rate of PO43-is less than NO3-or NO2-.Negative membrane is effective to remove phosphorus,nitrogen and CODCr in produced water(the reclaimed water)and remove phosphorus from the phosphorous wastewater and produced water.

关 键 词： 复合纳滤膜 脱磷 脱氮 污水 中水 截留率

领　　域： [石油与天然气工程] [化学工程]