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Thiourea grafted PVDF affinity membrane with narrow pore size distribution for Au (III) adsorption: Preparation, characterization, performance investigation and modeling
Wang, Xiaomin1,2,3; Xu, Junbo1; Li, Lei1,2; Li, Haigang1,4; Yang, Chuanfang1,2
2017-04-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume314Pages:700-713
Abstract

Thick and hydrophilic microporous poly(vinylidene fluoride) (PVDF) affinity membranes were prepared for low-concentration gold separation by grafting thiourea on alkali treated PVDF resin. The modified polymer was easily cast into membranes by non-solvent induced phase separation through two coagulation processes, and the addition of N-methyl-2pyrrolidone into the second coagulation bath improved the pore size distribution effectively. The grafted polymer and membrane were characterized by FTIR, Raman, H-1 NMR, XPS, SEM and pore size distribution measurement. Static adsorption of Au (III) with the membranes followed pseudo-second order kinetics and Langmuir isotherm. Dynamic adsorption was investigated by using stacked membranes in the form of a membrane chromatography. The results showed that increasing the number of membrane layers improved the membrane bed utilization, which was attributed to the increased adsorption sites and a combined effect of reduced average membrane pore size and narrowed pore size distribution (PSD). The effect of PSD on performance of the membrane chromatography was further separated from that of the mean pore size, and it was shown that narrower PSD indeed was favorable. A new mathematical model based on dispersive mass transfer through the membrane pores and incorporating PSD was established. The model was found to be able to predict the membrane breakthrough behavior very well. Finally, the elution performance of gold laden membrane was studied, and an optimized formulation of the eluent consisting of thiourea and HCl was determined. (C) 2016 Elsevier B.V. All rights reserved.

KeywordThiourea Grafted Pvdf Membrane Gold Breakthrough Pore Size Distribution Modeling
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.cej.2016.12.035
Indexed BySCI
Language英语
WOS KeywordLinked Chitosan Resin ; Gold-recovery ; Poly(Vinylidene Fluoride) ; Aqueous-solutions ; Carbon Nanotubes ; Activated Carbon ; Thiosemicarbazide ; Removal ; Thermodynamics ; Palladium(Ii)
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationChinese Academy of Sciences ; Youth Fund of GPE, CAS(GPE201405) ; National Natural Science Foundation of China(21506222)
WOS IDWOS:000395211100070
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22087
Collection生化工程国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.China Shipbldg Ind Corp, Res Inst 712, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xiaomin,Xu, Junbo,Li, Lei,et al. Thiourea grafted PVDF affinity membrane with narrow pore size distribution for Au (III) adsorption: Preparation, characterization, performance investigation and modeling[J]. CHEMICAL ENGINEERING JOURNAL,2017,314:700-713.
APA Wang, Xiaomin,Xu, Junbo,Li, Lei,Li, Haigang,&Yang, Chuanfang.(2017).Thiourea grafted PVDF affinity membrane with narrow pore size distribution for Au (III) adsorption: Preparation, characterization, performance investigation and modeling.CHEMICAL ENGINEERING JOURNAL,314,700-713.
MLA Wang, Xiaomin,et al."Thiourea grafted PVDF affinity membrane with narrow pore size distribution for Au (III) adsorption: Preparation, characterization, performance investigation and modeling".CHEMICAL ENGINEERING JOURNAL 314(2017):700-713.
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