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Synthesis of polyethylenimine-functionalized poly(glycidyl methacrylate) magnetic microspheres and their excellent Cr(VI) ion removal properties
Sun, Xitong1,2; Yang, Liangrong1; Xing, Huifang1; Zhao, Junmei1; Li, Xiaopei1,2; Huang, Yinbin1,2; Liu, Huizhou1
2013-12-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
Volume234Issue:0Pages:338-345
AbstractMicron-sized polyethylenimine-functionalized poly(glycidyl methacrylate) superparamagnetic microspheres (m-PGMA-PEI) were prepared by a process involving: (1) synthesis of PGMA microspheres using the dispersion polymerization method; (2) ring-opening reaction of epoxy groups on PGMA microspheres with ethylenediamine (EDA) to yield amino groups; (3) in situ coprecipitation of Fe3O4 nanoparticles into the pores of microspheres; (4) Michael addition of amino groups with methyl acrylate (MA) to yield ester groups; and (5) amidation of the terminal ester groups with polyethylenimine (PEI). Once generated, the resulting m-PGMA-PEI microspheres were tested for their ability to remove Cr(VI) from an aqueous solution in batch experiments. The results demonstrated that Cr(VI) adsorption was significantly pH dependent. The optimized pH value was 2.0. The adsorption isotherm of the adsorbent fit the Langmuir model, with the maximum adsorption capacity of 492.61 mg/g. The Cr(VI) adsorption rate was rapid, and the adsorption reached equilibrium within 15 min. The thermodynamic parameters (Delta G(0), Delta H-0, Delta S-0) demonstrated that the adsorption process was endothermic and spontaneous in nature. The presence of the coexisting anions involving Cl-, NO3-, H2PO4- and HPO42- had no remarkable influence on Cr(VI) adsorption except SO42-. The regeneration study proved that the m-PGMA-PEI microspheres could be repeatedly utilized with no significant loss of adsorption efficiency. (C) 2013 Elsevier B.V. All rights reserved.
KeywordPgma Polyethylenimine Cr(Vi) Adsorption Equilibrium
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
Language英语
WOS KeywordHEXAVALENT CHROMIUM ; AQUEOUS-SOLUTION ; WASTE-WATER ; COMPOSITE MICROSPHERES ; ADSORPTION ; NANOPARTICLES ; ADSORBENTS ; BEADS ; INDUSTRIAL ; PARTICLES
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000328588300040
Citation statistics
Cited Times:81[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13651
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.Chinese Acad Sci, Grad Univ, Beijing 100149, Peoples R China
Recommended Citation
GB/T 7714
Sun, Xitong,Yang, Liangrong,Xing, Huifang,et al. Synthesis of polyethylenimine-functionalized poly(glycidyl methacrylate) magnetic microspheres and their excellent Cr(VI) ion removal properties[J]. CHEMICAL ENGINEERING JOURNAL,2013,234(0):338-345.
APA Sun, Xitong.,Yang, Liangrong.,Xing, Huifang.,Zhao, Junmei.,Li, Xiaopei.,...&Liu, Huizhou.(2013).Synthesis of polyethylenimine-functionalized poly(glycidyl methacrylate) magnetic microspheres and their excellent Cr(VI) ion removal properties.CHEMICAL ENGINEERING JOURNAL,234(0),338-345.
MLA Sun, Xitong,et al."Synthesis of polyethylenimine-functionalized poly(glycidyl methacrylate) magnetic microspheres and their excellent Cr(VI) ion removal properties".CHEMICAL ENGINEERING JOURNAL 234.0(2013):338-345.
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