CAJ | 학술논문

采用凝胶色谱考察黄浦江原水的相对分子质量分布以及比较3种混凝剂作为预处理去除有机物改善通量的效果.研究表明,黄浦江原水按照相对分子质量的大小可分为3部分.第一部分由相对分子质量在25 000的亲水性有机物构成;第二部分由相对分子质量在3 000～6 000的有机物所构成,这部分的有机物主要为腐殖酸和富里酸所组成;第三部分由相对分子质量在500左右的亲水性有机物构成.尽管相对分子质量较大的亲水性有机物所占比例较小,但对超滤膜通量的下降有较大的影响.采用混凝作为超滤膜的预处理,可以减缓通量的下降.不同的混凝剂,对通量改善的效果不同.试验结果表明,聚氯化铝较三氯化铁和聚硅硫酸铝,能更有效改善通量,这是由于聚氯化铝可有效去除大分子的亲水性有机物的缘故.
채용응효색보고찰황포강원수적상대분자질량분포이급비교3충혼응제작위예처리거제유궤물개선통량적효과.연구표명,황포강원수안조상대분자질량적대소가분위3부분.제일부분유상대분자질량재25 000적친수성유궤물구성;제이부분유상대분자질량재3 000～6 000적유궤물소구성,저부분적유궤물주요위부식산화부리산소조성;제삼부분유상대분자질량재500좌우적친수성유궤물구성.진관상대분자질량교대적친수성유궤물소점비례교소,단대초려막통량적하강유교대적영향.채용혼응작위초려막적예처리,가이감완통량적하강.불동적혼응제,대통량개선적효과불동.시험결과표명,취록화려교삼록화철화취규류산려,능경유효개선통량,저시유우취록화려가유효거제대분자적친수성유궤물적연고.
In this paper,HPSEC was employed to examine the distribution of MW in HuangpuRiver and effects of three coagulants on removing organics and enhancing flux.The results demonstrated that the organics in Huangpu River could be divided into three portions based on MW.The first portion consisted of hydrophilic fraction with MW of 25 000;the second portion consisted mainly of humic and fulvic acids with MW of 3 000～6 000:the third portion consisted of hydrophilic organics with MW of 500.The first portion showed a great impact on flux decline of UF membrane despite accounting for a small portion in all organics.The ultrafiltration flux decline could be alleviated by using coagulant as a pretreatment,and different coagulants showed different effects.The results showed that polyaluninum chloride enhanced flux more effectively than ferric chloride and aluminum sulphate polysilicate,which can be contributed to its more effective removal of the hydrophilic organic with higher MW.