CAS OpenIR  > 生化工程国家重点实验室
Regenerable biocatalytic nanofiltration membrane for aquatic micropollutants removal
Li, Sushuang1,2; Luo, Jianquan1,2; Wan, Yinhua1,2
2018-03-01
发表期刊JOURNAL OF MEMBRANE SCIENCE
ISSN0376-7388
卷号549页码:120-128
摘要A trade-off between operation stability and activity regeneration limits the application of biocatalytic membrane, and when it is applied for micropollutants removal from drinking water under flow-through mode, a high removal efficiency is required. To address these issues, a regenerable nanofiltration (NF) biocatalytic membrane was fabricated by immobilizing laccase on polydopamine/polyethyleneimine (PDA/PEI)-coated NF membrane via physical adsorption. The effect of base membrane properties, dopamine coating time, PEI molecular weight, loading pH on the biocatalytic membrane performance was investigated in terms of permeability, enzyme loading and activity. It was proved that electrostatic and hydrophobic interactions between laccase and PEI molecules were the main immobilization mechanisms, and 750000 Da PEI molecule was selected to immobilize laccase at pH 5. The bisphenol A (BPA) removal by such biocatalytic membrane under flow-through mode was improved mainly due to its enhanced rejection ability (pore narrowing and surface hydrophilicity enhancement by the PDA/PEI layer). To further increase the BPA removal, the synthetic and natural mediators were introduced to improve the laccase-induced BPA oxidation by accelerating electron transfer, and the BPA removal kept higher than 97% during 7 reuse cycles without detectable loss of mediators. Moreover, traces of BPA in water was enriched on the surface of the biocatalytic membrane by pressure-driven filtration, thus improving BPA biodegradation by the laccase-mediator system. The biocatalytic membrane could be fast regenerated by chemical cleaning and reloading, and during the storage or operation, the leaked enzymes were also able to be recaptured. This work not only proposed a novel concept of regenerable biocatalytic NF membrane, but also offered a sustainable solution to quickly remove micropollutants in drinking water.
关键词Enzyme Immobilization Micropollutants Laccase Bisphenol a Dopamine
文章类型Article
WOS标题词Science & Technology ; Technology ; Physical Sciences
DOI10.1016/j.memsci.2017.11.075
收录类别SCI
语种英语
关键词[WOS]BISPHENOL-A ; LACCASE ; DEGRADATION ; PRODUCTS ; ENZYMES ; LIGNIN
WOS研究方向Engineering ; Polymer Science
WOS类目Engineering, Chemical ; Polymer Science
项目资助者National Science Foundation of China(21506229) ; National High Technology Research and Development Program of China(2014AA021006) ; "100 Talents Program" of Chinese Academy of Sciences
WOS记录号WOS:000424393100013
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/23995
专题生化工程国家重点实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Li, Sushuang,Luo, Jianquan,Wan, Yinhua. Regenerable biocatalytic nanofiltration membrane for aquatic micropollutants removal[J]. JOURNAL OF MEMBRANE SCIENCE,2018,549:120-128.
APA Li, Sushuang,Luo, Jianquan,&Wan, Yinhua.(2018).Regenerable biocatalytic nanofiltration membrane for aquatic micropollutants removal.JOURNAL OF MEMBRANE SCIENCE,549,120-128.
MLA Li, Sushuang,et al."Regenerable biocatalytic nanofiltration membrane for aquatic micropollutants removal".JOURNAL OF MEMBRANE SCIENCE 549(2018):120-128.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Li, Sushuang]的文章
[Luo, Jianquan]的文章
[Wan, Yinhua]的文章
百度学术
百度学术中相似的文章
[Li, Sushuang]的文章
[Luo, Jianquan]的文章
[Wan, Yinhua]的文章
必应学术
必应学术中相似的文章
[Li, Sushuang]的文章
[Luo, Jianquan]的文章
[Wan, Yinhua]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。