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Chemical filtration of Cr (VI) with electrospun chitosan nanofiber membranes
Li, Lei1,2,3; Li, Yanxiang1,2; Yang, Chuanfang1,2
2016-04-20
发表期刊CARBOHYDRATE POLYMERS
ISSN0144-8617
卷号140期号:APR页码:299-307
摘要

Chitosan nanofibers (average diameter of 75 nm) were electrospun on polyester (PET) scrim to form composite nanofiber membranes with controlled pore size. The membranes were then stacked as a membrane bed for chemical filtration of Cr (VI) of 1-5 mg/L. The performance of the bed with respect to loading capacity at breakthrough, bed saturation and utilization efficiency were carefully investigated. The results showed that while these three parameters were dependent on pH, flow rate, flow distribution and packed pattern of the membrane, the latter two were less affected by feed Cr (VI) concentration and bed length. The maximum bed loading capacity for 1 mg/L Cr (VI) filtration at breakthrough was found to be 16.5 mgchromium/g-chitosan, higher than the static adsorption capacity of 11.0 mg-chromium/g-chitosan using nanofiber mats, indicating the membranes' better potential for dynamic adsorption. The minimum bed length required to avoid breakthrough was determined to be three layers of stacked membranes with nanofiber deposition density of 1 g/m2 by applying bed depth service time (BDST) model. (C) 2015 Elsevier Ltd. All rights reserved.

关键词Electrospun Chitosan Nanofiber Membrane Chemical Filtration Chromium (Vi) Adsorption Breakthrough Curves Model Fitting
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.carbpol.2015.12.067
收录类别SCI
语种英语
关键词[WOS]Aqueous-solution ; Metal-ions ; Adsorption ; Removal ; Fibers ; Bioseparations ; Sorption ; Design ; Column ; Copper
WOS研究方向Chemistry ; Polymer Science
WOS类目Chemistry, Applied ; Chemistry, Organic ; Polymer Science
项目资助者Chinese Academy of Sciences under the talented program ; National Nature Science Foundation of China(51302267 ; 21476237 ; 21401210)
WOS记录号WOS:000369958300038
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/20637
专题研究所(批量导入)
通讯作者Yang, Chuanfang
作者单位1.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Li, Lei,Li, Yanxiang,Yang, Chuanfang. Chemical filtration of Cr (VI) with electrospun chitosan nanofiber membranes[J]. CARBOHYDRATE POLYMERS,2016,140(APR):299-307.
APA Li, Lei,Li, Yanxiang,&Yang, Chuanfang.(2016).Chemical filtration of Cr (VI) with electrospun chitosan nanofiber membranes.CARBOHYDRATE POLYMERS,140(APR),299-307.
MLA Li, Lei,et al."Chemical filtration of Cr (VI) with electrospun chitosan nanofiber membranes".CARBOHYDRATE POLYMERS 140.APR(2016):299-307.
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