混凝-超滤去除水中双酚A的影响因素研究  

Study on Influencing Factors of Coagulation-Ultrafiltration on Bisphenol A Removal

作　　者：郭婷婷 尹云军 于淼[1] GUO Ting-ting;YIN Yun-jun;YU Miao

机构地区：[1]中国恩菲工程技术有限公司,北京100038

出　　处：《有色冶金节能》2022年第2期23-27,共5页Energy Saving of Nonferrous Metallurgy

基　　金：应用于城市污水的分段进水厌氧氨氧化生物膜工艺开发及其调控机制研究(课题编号:YG2067)。

摘　　要：超滤技术广泛应用于水处理中,而混凝预处理是控制超滤膜污染的有效技术之一。本文研究了混凝、超滤以及两者组合工艺去除双酚A(BPA)的特性和影响因素。结果表明,硫酸铝混凝对BPA的去除效果有限,当硫酸铝投加量为15 mg/L,pH值为7时,BPA去除率最大,为32.04%;此时Zeta电位接近等电点;提高腐殖酸浓度不利于BPA的去除。在超滤影响因素研究中,初始BPA浓度越小,超滤膜孔径越小,截留去除BPA量越大;当pH值接近BPA的酸式离解常数时,BPA去除效果变差。相较于单独的混凝或超滤工艺,混凝-超滤组合工艺的BPA去除率较高,说明混凝预处理效果好,并有利于降低膜污染。随着硫酸铝投加量增加,混凝-超滤组合工艺去除BPA效果增强;随着污染物初始浓度增加,BPA去除率降低。Ultrafiltration technology is widely used in water treatment,and coagulation pretreatment is one of the effective technologies to control ultrafiltration membrane fouling.In this paper,the characteristics and influencing factors of Bisphenol A(BPA)removal by coagulation,ultrafiltration and coagulation-ultrafiltration were studied.The results show that the removal of BPA by aluminum sulfate coagulation is limited.When the dosage of aluminum sulfate is 15 mg/L and pH value is 7,the removal rate of BPA is the highest,and the Zeta potential is close to the isoelectric point.Increasing humic acid concentration is not conducive to BPA removal.In the study of influencing factors of ultrafiltration,the smaller the initial BPA concentration and the smaller the pore size of ultrafiltration membrane,the higher the removal efficiency of BPA.When the pH value is close to the acid dissociation constant of BPA,the removal effect of BPA becomes worse.Compared with the single coagulation or ultrafiltration process,the removal rate of BPA of the combined coagulation-ultrafiltration process is higher,which indicates coagulation preteatment has good effect and is beneficial for reducing membrane fouling.With the increase of aluminum sulfate dosage,the removal effect of BPA by coagulation-ultrafiltration combined process is enhanced.With the increase of initial concentration of pollutants,the removal rate of BPA decreased.

关 键 词：硫酸铝 混凝 超滤 双酚A 膜污染 水处理 

分 类 号：X703[环境科学与工程—环境工程]