Study on the treatment of surface water by electro-assisted carbon based ultrafiltration membrane

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Oct.2023, Vol.46 No.10: 1307-1313

DOI: 10.3969/j.issn.1003-5060.2023.10.002

Authors

CHEN Penghui $ ^{1,2} $, SUN Xuefei $ ^{1,2} $, YIN Yiyun $ ^{1,2} $

(1. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; 2. Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei 230009, China)

Abstract and Keywords

Abstract: This paper uses an electrochemical membrane filtration (EMF) process that couples electrochemical oxidation technology and membrane separation technology to treat surface water bodies. A carbon fiber cloth/polyethersulfone (CC/PES) composite membrane with low cost and good conductivity was prepared by phase conversion method, and the electrochemical assistance was used to enhance the removal rate of pollutants by the composite membrane and solve the problem of membrane fouling during membrane separation. The experimental results of surface water treatment show that the membrane flux of pure membrane filtration after three cycles is 31.5% of the initial flux, while under the assistance of electricity, the membrane flux is 40.8% and 43.8% of the initial flux when the voltage is $ \pm2.0 $ V and the membrane is used as the anode and cathode, respectively; under electrochemical assisted backwashing, the flux recovery rate of the membrane system is close to 96%, and the effluent quality of the system has significantly improved; the energy consumption analysis of the system indicates that the membrane filtration system under the action of an electric field has better economic benefits. The research results can provide a theoretical basis for the practical application of EMF technology in drinking water treatment.

Keywords: carbon fiber based; composite membrane; electro-assistance; antipollution performance; surface water filtration

作者信息

陈鹏辉 $ ^{1,2} $，孙雪菲 $ ^{1,2} $，殷翼云 $ ^{1,2} $

(1. 合肥工业大学资源与环境工程学院, 安徽合肥 230009; 2. 纳米矿物与污染控制安徽普通高校重点实验室, 安徽合肥 230009)

摘要和关键词

摘要: 文章采用耦合电化学氧化技术与膜分离技术的电化学辅助膜过滤（electrochemical membrane filtration，EMF）工艺对地表水体进行处理；通过相转化法制备一种成本低廉、导电性能良好的碳纤维布（carbon fiber cloth，CC）聚醚砜（polyethersulfone，PES）CC/PES复合膜，利用电化学辅助作用强化复合膜对污染物的去除率和解决膜分离过程中膜污染问题。地表水处理实验结果表明：单纯膜过滤在3个循环周期后的膜通量为初始通量的31.5%，而在电辅助下，施加电压为±2.0 V，膜分别作为阳极和阴极时，膜通量分别为初始通量的40.8%、43.8%；膜系统在电化学辅助反冲洗下，通量恢复率接近96%，且系统出水水质有明显提升；系统能耗分析表明，电场作用下的膜过滤系统具有更好的经济效益。研究结果可为电化学辅助膜过滤工艺在饮用水处理中的实际应用提供理论基础。

关键词: 碳纤维基；复合膜；电辅助；抗污染性能；地表水过滤

Funding

国家自然科学基金资助项目（51978227）；中央高校基本科研业务费专项资金资助项目（PA2020GDKC0025）

合肥工业大学学报(自然科学版)

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