摘要
采用商业正渗透膜(FO)对废水中的3种不同抗生素(甲氧苄啶、四环素和磺胺甲噁唑)进行截留.研究了不同汲取液浓度、种类、共存污染物、pH对3种抗生素截留效果的影响.结果表明,提高汲取液浓度可以增加正渗透膜水通量,但也增加了溶质返混通量;由于3种抗生素的带电电荷和结构不同,与膜的表面作用也不同,截留率TMP>四环素>SMZ,不同抗生素的主导截留机制不同;共存污染物腐殖酸和牛血清白蛋白会促进抗生素的截留,且在碱性条件下抗生素的截留率会进一步升高.这些实验结果可为FO应用于抗生素废水的处理提供参数.
The rejection of three antibiotics,which was trimethoprim(TMP),tetracycline(TC)and sulfamethoxazole(SMZ),in waste water has been studied using a commercial forward osmosis membrane.The effects of different types of draw solution on the basic properties of the forward osmosis membrane were studied.In addition,the effects of varying the draw solution,organic contaminants and environmental pH on the rejection of the three antibiotics under optimal conditions were also explored.The results showed that increasing the concentration of draw solution increased the water flux of the forward osmosis membrane and the reverse solution flux.Since the three antibiotics have different electric charges,they have different effects on the membrane.The rejection rate decreased in the order TMP >TC >SMZ.In the presence of organic pollutants,alkaline conditions increase the rejection rate of the three antibiotics.These results can provide parameters for the treatment of antibiotic wastewater by a FO process.
作者
丁嘉奇
蔡腾
黄满红
DING Jiaqi;CAI Teng;HUANG Manhong(College of Environmental Science and Engineering,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry,Donghua University,Shanghai 201620,China;Shaghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2018年第6期97-104,共8页
Membrane Science and Technology
基金
国家自然科学基金资助项目(21477018,21507142)
国家重点研发项目(2016YFC0400502).
关键词
正渗透(FO)膜
水通量
溶质返混
抗生素
截留率
forward osmosis (FO)membrane
water flux
reverse solution flux
antibiotics
rejection
