电氧化耦合纳滤工艺处理微污染苦咸水研究  

Electrical Oxidation Coupled Nanofiltration Treatment of Slightly Contaminated Brackish Water

作　　者：杜星 王金鹏 赵文涛 林钰涵 宋阳 王志红[1] DU Xing;WANG Jinpeng;ZHAO Wentao;LIN Yuhan;SONG Yang;WANG Zhihong(School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学土木与交通工程学院,广东广州510006

出　　处：《水处理技术》2022年第4期137-142,共6页Technology of Water Treatment

基　　金：国家自然科学基金项目青年基金(51808131)。

摘　　要：针对抗生素污染引起的微污染苦咸水问题,本研究采用电氧化耦合纳滤工艺对其进行处理,使其达到净化效果。考查不同的电导率、电流密度、初始微污染物浓度、错流速度和有机物含量等条件下,耦合工艺的净水效能。结果表明,电导率对于去除水中抗生素类物质有明显的效果,尤其在电流密度 10 mA/cm;和电氧化时间 2 min 条件下,对微污染苦咸水中抗生素的去除最为高效,可将原水中 SMZ 降解到痕量。在短期实验中,耦合系统对水中抗生素的去除可以达到 100%,同时纳滤对天然有机物有很明显的截留效果。在多周期实验中,耦合系统对水中抗生素、天然有机物和盐类的去除可以达到100%、90%和90%,且随着运行时间的增加出水水质较为稳定。通过研究多周期实验膜污染情况,发现膜污染主要发生在纳滤的前期,有机物浓度是影响膜通量的主要因素;且对纳滤膜表面进行成分测试和扫描式电子显微镜-X 射线能谱分析,结果表明纳滤膜截留大量的有机、无机物。可见,经过电氧化预处理耦合纳滤工艺可协同实现降解抗生素、去除有机物和脱盐的目的。To solve the problem of micropolluted brackish water caused by antibiotic contamination, electrical oxidation coupled nanofiltration process was used to treat the brackish water in this study, so as to achieve the purification effect. The water purification efficiency of Coupled process was tested under different conditions, such as electrical conductivity, current density, initial micropollutant concentration, cross flow velocity and organic content. The results showed that electrical conductivity was effective in removing antibiotics from water, especially at the current density of 10 mA/cm;and the electrical oxidation time of 2 min, it was the most efficient in removing antibiotics from micropolluted brackish water, and it could degrade SMZ to trace amounts in raw water. In short-term experiments, the Coupled system was able to remove 100% and 90% of antibiotics and salts in water, and NF had a significant retention effect on natural organic compounds. In multi-cycle experiments, the Coupled system can remove 100%,90% and 90% of antibiotics, natural organic compounds and salts in water, and the effluent water quality is relatively stable with the increase of running time. By studying the membrane fouling in the multi-period experiment, it was found that the membrane fouling mainly occurred in the early stage of nanofiltration, and the concentration of organic matter was the main factor affecting the membrane flux. The composition test and SEM-EDS analysis on the surface of the nanofiltration membrane showed that a large number of organic and inorganic substances were trapped in the nanofiltration membrane. It can be seen that the electrical oxidation pretreatment coupled nanofiltration process can synergistically achieve the purpose of antibiotic degradation, organic matter removal and desalination.

关 键 词：电氧化 纳滤 苦咸水 抗生素去除 脱盐 

分 类 号：X523[环境科学与工程—环境工程]