纳米氧化石墨烯改性PVDF微滤膜在MBR中的抗污染性能

doi:10.11949/j.issn.0438-1157.20160769

化工学报 ›› 2017, Vol. 68 ›› Issue (1): 375-384.DOI: 10.11949/j.issn.0438-1157.20160769

• 材料化学工程与纳米技术 • 上一篇下一篇

纳米氧化石墨烯改性PVDF微滤膜在MBR中的抗污染性能

赵传起¹, 杨悦锁¹, 徐晓晨², 杨凤林²

1 沈阳大学环境学院, 辽宁沈阳 110044;
2 大连理工大学环境学院, 辽宁大连 116024

收稿日期:2016-06-02 修回日期:2016-08-26 出版日期:2017-01-05 发布日期:2017-01-05
通讯作者: 赵传起
基金资助:
国家自然科学基金项目（21177019）；教育部重点实验室开放基金项目（KLIEEE-15-06）；沈阳市科技计划项目（F15-113-9-00）。

Antifouling performance of graphene oxide modified PVDF microfiltration membranes in membrane bioreactor

ZHAO Chuanqi¹, YANG Yuesuo¹, XU Xiaochen², YANG Fenglin²

1 School of Environmental Science and Technology, Shenyang University, Shenyang 110044, Liaoning, China;
2 School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China

Received:2016-06-02 Revised:2016-08-26 Online:2017-01-05 Published:2017-01-05
Contact: 10.11949/j.issn.0438-1157.20160769
Supported by:
supported by the National Natural Science Foundation of China (21177019), the Key Laboratory of Industrial Ecology and Environmental Engineering (KLIEEE-15-06) and the Shenyang Municipal Science and Technology (F15-113-9-00).

摘要/Abstract

摘要：

利用强亲水性氧化石墨烯（GO）作为添加剂，自制了PVDF/GO复合微滤膜，并将其应用于MBR系统中，进行长期应用研究。研究发现，共混膜的表面性质得到改善，其表面含氧基团达到29.33%（GO=3%）；共混膜与PVDF膜对污染物的去除效果相近，但共混膜（GO=3%）仅进行了一次清洗，清洗周期是PVDF的4倍；PVDF/GO共混膜的膜阻力要低于PVDF膜，并且共混膜的不可逆污染阻力显著下降，其数值仅仅是PVDF膜的9.0%（GO=3%）；EPS分析发现，共混膜表面的EPS浓度明显减少，其降幅分别达到59.98%（GO=1%）和69.57%（GO=3%），抗污染性能显著提高；通过SEM与CLSM分析发现，随着氧化石墨烯加入量的提高，共混膜表面形成了滤饼层变得疏松，厚度也变薄，甚至露出了部分膜表面（GO=3%），保证了共混膜稳定的渗透率。

关键词: 膜, 环境, 纳米材料, 氧化石墨烯, 亲水改性, 膜污染

Abstract:

Polyvinylidene fluoride(PVDF)/graphene oxide(GO) nanocomposite membranes, which were made of PVDF naocomposites with different content of super hydrophilic graphene oxide(GO) nanosheets, were assessed for long term application in a membrane bioreactor(MBR) system.Critical flux, MBR performance, membrane resistance, and anti-fouling properties were intensively studied.Surface hydrophilicity of PVDF/GO membranes was improved with presence of surficial oxygen-containing groups up to 29.33%(GO=3%).PVDF/GO membranes showed similar anti-fouling to PVDF control membrane, however, PVDF/GO(GO=3%) membrane required only one cleaning with cleaning cycle 4 times longer than PVDF control.PVDF/GO membrane had lower membrane resistance than PVDF control and significant reduction in irreversible fouling resistance.As an example, PVDF/GO(GO=3%) membrane had about 9% of irreversible fouling resistance of PVDF control.Antifouling improvement of PVDF/GO membrane was further shown by EPS study that much lower EPS intensities were observed with a reduction of 59.98%(GO=1%) and 69.57%(GO=3%) in comparison to PVDF control.Scanning electron microscopy(SEM) and confocal laser scanning microscope(CLSM) results showed that cake layer on nanocomposite membrane became looser and thinner with the increase of GO content.Part of PVDF/GO(GO=3%) membrane surface was exposed, resulting in high stable permeability over a long period of time.

Key words: membrane, environment, nanomaterials, graphene oxide, hydrophilic modification, fouling

中图分类号:

X703.1

赵传起, 杨悦锁, 徐晓晨, 杨凤林. 纳米氧化石墨烯改性PVDF微滤膜在MBR中的抗污染性能[J]. 化工学报, 2017, 68(1): 375-384.

ZHAO Chuanqi, YANG Yuesuo, XU Xiaochen, YANG Fenglin. Antifouling performance of graphene oxide modified PVDF microfiltration membranes in membrane bioreactor[J]. CIESC Journal, 2017, 68(1): 375-384.

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纳米氧化石墨烯改性PVDF微滤膜在MBR中的抗污染性能

Antifouling performance of graphene oxide modified PVDF microfiltration membranes in membrane bioreactor

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