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Amino-functionalized magnetic cellulose nanocomposite as adsorbent for removal of Cr(VI): Synthesis and adsorption studies
Alternative TitleChem. Eng. J.
Sun, Xitong1,2; Yang, Liangrong1; Li, Qian3; Zhao, Junmei1; Li, Xiaopei1,2; Wang, Xiaoqin1,2; Liu, Huizhou1
2014-04-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume241Issue:1Pages:175-183
AbstractA novel amino-functionalized magnetic cellulose composite was prepared by a process involving: (1) synthesis of magnetic silica nanoparticles using the co-precipitation method followed by the hydrolysis of sodium silicate, (2) coating with cellulose through the regeneration of cellulose dissolved in 7 wt% NaOH/12 wt% urea aqueous solvent, (3) grafting of glycidyl methacrylate using cerium initiated polymerization and (4) ring-opening reaction of epoxy groups with ethylenediamine to yield amino groups. Once generated, the resulting composite was tested for its ability to remove Cr(VI) from an aqueous solution in batch experiments. The results demonstrated that Cr(VI) adsorption was highly pH dependent. The optimized pH value was 2.0. The adsorption isotherms of the adsorbent fit the Langmuir model, with the maximum adsorption capacity of 171.5 mg/g at 25 degrees C. The adsorption rate was considerably fast, and the adsorption reached equilibrium within 10 min. The obtained thermodynamic parameters showed that the adsorption of Cr(VI) onto the adsorbent was an exothermic and spontaneous process. In addition, the Cr(VI) ions could be effectively desorbed using a 0.1 mol/L NaOH solution and the adsorbent exhibited a good reusability. The composite material should be a promising adsorbent for Cr(VI) removal, with the advantages of high adsorption capacity, rapid adsorption rate and convenient recovery under magnetic field. (C) 2013 Elsevier B.V. All rights reserved.; A novel amino-functionalized magnetic cellulose composite was prepared by a process involving: (1) synthesis of magnetic silica nanoparticles using the co-precipitation method followed by the hydrolysis of sodium silicate, (2) coating with cellulose through the regeneration of cellulose dissolved in 7 wt% NaOH/12 wt% urea aqueous solvent, (3) grafting of glycidyl methacrylate using cerium initiated polymerization and (4) ring-opening reaction of epoxy groups with ethylenediamine to yield amino groups. Once generated, the resulting composite was tested for its ability to remove Cr(VI) from an aqueous solution in batch experiments. The results demonstrated that Cr(VI) adsorption was highly pH dependent. The optimized pH value was 2.0. The adsorption isotherms of the adsorbent fit the Langmuir model, with the maximum adsorption capacity of 171.5 mg/g at 25 degrees C. The adsorption rate was considerably fast, and the adsorption reached equilibrium within 10 min. The obtained thermodynamic parameters showed that the adsorption of Cr(VI) onto the adsorbent was an exothermic and spontaneous process. In addition, the Cr(VI) ions could be effectively desorbed using a 0.1 mol/L NaOH solution and the adsorbent exhibited a good reusability. The composite material should be a promising adsorbent for Cr(VI) removal, with the advantages of high adsorption capacity, rapid adsorption rate and convenient recovery under magnetic field. (C) 2013 Elsevier B.V. All rights reserved.
KeywordCellulose Composite Cr(Vi) Adsorption Equilibrium
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.cej.2013.12.051
URL查看原文
Indexed BySCI
Language英语
WOS KeywordHEAVY-METAL IONS ; HIGH-CAPACITY ADSORPTION ; PENICILLIN-G ACYLASE ; HEXAVALENT CHROMIUM ; AQUEOUS-SOLUTION ; WASTE-WATER ; MICROSPHERES ; COMPOSITE ; EQUILIBRIUM ; INDUSTRIAL
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000333720000020
Citation statistics
Cited Times:209[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10963
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100149, Peoples R China
3.Dalian Polytech Univ, Sch Biol Engn, Dalian 116034, Peoples R China
Recommended Citation
GB/T 7714
Sun, Xitong,Yang, Liangrong,Li, Qian,et al. Amino-functionalized magnetic cellulose nanocomposite as adsorbent for removal of Cr(VI): Synthesis and adsorption studies[J]. CHEMICAL ENGINEERING JOURNAL,2014,241(1):175-183.
APA Sun, Xitong.,Yang, Liangrong.,Li, Qian.,Zhao, Junmei.,Li, Xiaopei.,...&Liu, Huizhou.(2014).Amino-functionalized magnetic cellulose nanocomposite as adsorbent for removal of Cr(VI): Synthesis and adsorption studies.CHEMICAL ENGINEERING JOURNAL,241(1),175-183.
MLA Sun, Xitong,et al."Amino-functionalized magnetic cellulose nanocomposite as adsorbent for removal of Cr(VI): Synthesis and adsorption studies".CHEMICAL ENGINEERING JOURNAL 241.1(2014):175-183.
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