聚砜纳滤中空纤维膜去除内分泌干扰物双酚A的研究
作者:张洁欣12,魏俊富12,张环12
单位: 1. 天津工业大学环境与化学工程学院, 天津300160; 2. 天津工业大学中空纤维膜材料与膜过程教育部重点实验室, 天津300160
关键词: 聚砜;双酚A;吸附;截留率;通量
DOI号:
分类号: TQ028.8
出版年,卷(期):页码: 2012,32(2):41-45

摘要:
由本实验室自制等离子体改性聚砜纳滤中空纤维膜对内分泌干扰物双酚A溶液进行截留,通过改变溶液浓度,pH值,操作压力以及离子强度等因素,经过长时间截留,观察聚砜纳滤中空纤维膜对双酚A溶液的截留率以及通量的变化,分析其作用机理,归纳出改变不同因素使得截留率及通量变化的规律,考察不同影响因素下原液浓度的变化。实验结果表明,聚砜纳滤中空纤维膜对双酚A有很强的吸附作用力,这种吸附力为去除双酚A的主要机理,且溶液为较高浓度,pH=6,压力为0.2MP,低离子强度时去除率达到90%以上。在近中性条件下,吸附作用力在聚砜纳滤中空纤维膜去除双酚A过程中起主导作用,在较高pH值条件下静电斥力发挥作用,离子强度的大小对吸附作用力影响不大。
Endocrine disruption compounds bisphenol A solution was retained by the plasma modified polysulfone nanofiltration hollow fiber membrane. The rejection tests were at different factors including solution concentration, operating pressure,ionic strength and pH value. The retention rate and flux of bisphenol A solution retained by polysulphone nanofiltration hollow fiber membrane was observed after a long time. The mechanism of retention was analyzed and the retention rate and flux change rules made by changing different factors were concluded. The change of feed solution in different factors was investigated. The result showed that there was a very strong adsorption force between polysulfone nanofiltration hollow fiber membrane and bisphenol A. The adsorption was the main mechanism in the process for removing bisphenol A. And the rate of removal could reach more than 90% when it was in high concentration, pH=6, low ionic strength and the operating pressure was 0.2MP. The adsorption played a leading role in the process when it was close to neutral. Electrostatic repulsion existed in higher pH value. The influence of ionic strength on the adsorption was little.

基金项目:
国家自然科学基金(21074091);天津市应用基础及前沿技术研究计划(09JCZDJC23200);天津市高等学校科技发展基金(2006ZD40)资助项目。

作者简介:
张洁欣( 1986- ) ,女,石家庄,硕士研究生,从事纳滤荷电膜分离小分子有机物方面的工作,电子邮件zhangjiexin.1986@163.com

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