• 更多栏目

    陈硕

    • 教授     博士生导师   硕士生导师
    • 性别:女
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:环境学院
    • 学科:环境工程. 环境科学
    • 办公地点:大连理工大学环境学院B717
    • 联系方式:0411-84706263
    • 电子邮箱:shuochen@dlut.edu.cn

    访问量:

    开通时间:..

    最后更新时间:..

    Enhanced separation performance of carbon nanotube-polyvinyl alcohol composite membranes for emulsified oily wastewater treatment under electrical assistance

    点击次数:

    论文类型:期刊论文

    第一作者:Yi, Gang

    通讯作者:Quan, X (reprint author), Dalian Univ Technol, Key Lab Ind Ecol & Environm Engn, Minist Educ China, Sch Environm Sci & Technol, Dalian 116024, Peoples R China.

    合写作者:Chen, Shuo,Quan, Xie,Wei, Gaoliang,Fan, Xinfei,Yu, Hongtao

    发表时间:2018-05-31

    发表刊物:SEPARATION AND PURIFICATION TECHNOLOGY

    收录刊物:SCIE、EI

    卷号:197

    页面范围:107-115

    ISSN号:1383-5866

    关键字:Carbon nanotube; Microfiltration; Electrically conductive membranes; Electro-filtration; Oily wastewater

    摘要:Membranes provide an effective solution to treat emulsified oily wastewater, but usually have inherent drawbacks: permeability and selectivity trade-off as well as serious membrane fouling. In this study, carbon nanotube-polyvinyl alcohol (CNT-PVA) composite membranes with high water flux and good electrical conductivity were fabricated and then served as cathode during the filtration of n-hexadecane-in-water emulsion (n-emulsion) and cutting fluid emulsion (c-emulsion) to improve the oil removal efficiency and alleviate membrane fouling. Results show that oil removal rates increase from 85.2% to 97.6% for n-emulsion and from 561% to 83.0% for c-emulsion after the application of -1.5 V. The permeation flux after an operation of 60 min with -1.5 V are 2.3 times and 2.2 times of those without potential for n-emulsion and c-emulsion, respectively. Additionally, less oil fouling can be observed from the SEM images of the membrane surface and fouling can be mitigated according to the analysis of fouling model. Cyclic voltammetry and zeta potential analysis demonstrate that electrostatic repulsion rather than electrochemical reactions is responsible for the enhanced oil removal rate and antifouling ability in the filtration process. Furthermore, the results of long term filtration with five runs indicate that the application of potential onto the membranes maintains remarkable stability in high oil removal rate and high flux recovery rate.