中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Removal of polycyclic aromatic hydrocarbons by nanofiltration membranes: Rejection and fouling mechanisms

文献类型:期刊论文

作者Li, Sushuang1,2; Luo, Jianquan1,2; Hang, Xiaofeng1; Zhao, Shiguang3; Wan, Yinhua1,2
刊名JOURNAL OF MEMBRANE SCIENCE
出版日期2019-07-15
卷号582页码:264-273
ISSN号0376-7388
关键词Polycyclic aromatic hydrocarbons Nanofiltration Fouling Removal mechanism Adsorption
DOI10.1016/j.memsci.2019.04.008
英文摘要Polycyclic aromatic hydrocarbons (PAHs), as a group of micropollutants with high toxicity, are commonly detected in the environment and difficult to remove. In this work, five commercial polyamide (PA) nanofiltration (NF) membranes were used to treat three PAHs in the synthetic solution or coking wastewater and their removal mechanisms were discussed. By comparing water permeability and PAHs rejections of the NF membranes before and after PAHs adsorption, we found that the PAHs adsorption into the membrane was the dominant rejection mechanism at the initial filtration stage. Due to the limited adsorption capacity and increasing diffusion of PAHs in the membrane, the PAHs rejections would drop rapidly and then reach steady. Size exclusion mechanism was also important to PAHs removal by NF, especially for PAHs with weaker polarity and higher molecular weight. Although the polysulfone intermediate layer could adsorb substantial PAHs resulting in an increase of filtration resistance, the pore blocking and narrowing effects on the PA separation layer were still the main reasons for the permeability loss of NF membranes. However, the glucose rejection did not change obviously after the PAHs adsorption in the membrane. Through analyzing porosity and pore size distribution of the NF membranes before and after PAHs adsorption, we found that for the NF membrane with small pore size and narrow pore size distribution (e.g. NF270), PAHs adsorption produced indiscriminate pore blocking effect, and thus the average pore size and its distribution as well as glucose rejection did not change obviously after fouling formation; while for the NF membrane with large pore size and wide pore size distribution (e.g. NF10), PAHs adsorption occurred more seriously in the larger pores leading to a pore narrowing effect, but the reduced pore size was still too large to affect glucose rejections. The outcomes of this work suggested that the PAHs adsorption in both separation and intermediate layers of NF membranes should be avoided, and the NF membrane with narrow pore size distribution was preferred for PAHs removal.
WOS关键词WASTE-WATER TREATMENT ; AQUEOUS PHOTODEGRADATION ; ORGANIC SOLUTES ; GRAPHENE OXIDE ; ADSORPTION ; PAHS ; DEGRADATION ; FILTRATION ; OSMOSIS ; LAYER
资助项目Major Science and Technology Program for Water Pollution Control and Treatment[2017ZX07402001-004] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2017069]
WOS研究方向Engineering ; Polymer Science
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000467250200027
资助机构Major Science and Technology Program for Water Pollution Control and Treatment ; Youth Innovation Promotion Association of Chinese Academy of Sciences
源URL[http://ir.ipe.ac.cn/handle/122111/28140]  
专题中国科学院过程工程研究所
通讯作者Luo, Jianquan; Wan, Yinhua
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, Sch Chem Engn, Beijing 100049, Peoples R China
3.Anhui Polytech Univ, Coll Biol & Chem Engn, Wuhu 241000, Peoples R China
推荐引用方式
GB/T 7714
Li, Sushuang,Luo, Jianquan,Hang, Xiaofeng,et al. Removal of polycyclic aromatic hydrocarbons by nanofiltration membranes: Rejection and fouling mechanisms[J]. JOURNAL OF MEMBRANE SCIENCE,2019,582:264-273.
APA Li, Sushuang,Luo, Jianquan,Hang, Xiaofeng,Zhao, Shiguang,&Wan, Yinhua.(2019).Removal of polycyclic aromatic hydrocarbons by nanofiltration membranes: Rejection and fouling mechanisms.JOURNAL OF MEMBRANE SCIENCE,582,264-273.
MLA Li, Sushuang,et al."Removal of polycyclic aromatic hydrocarbons by nanofiltration membranes: Rejection and fouling mechanisms".JOURNAL OF MEMBRANE SCIENCE 582(2019):264-273.

入库方式: OAI收割

来源:过程工程研究所

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