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Adsorptive removal of arsenic from aqueous solution by zeolitic imidazolate framework-8 (ZIF-8) nanoparticles
Jian, Meipeng; Liu, Bao; Zhang, Gaosheng; Liu, Ruiping; Zhang, Xiwang
2015-01-20
Source PublicationCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume465Issue:1Pages:67-76
AbstractIn this study, zeolitic imidazolate framework-8 (ZIF-8) nanosorbent was successfully synthesized via a facile method at room temperature. The ZIF-8 nanoparticles were characterized by nitrogen sorption, powder X-ray diffraction, field emission scanning electron microscope, transmission electron microscopy and Zeta potential. The synthesized ZIF-8 nanoparticles exhibited a high surface area of 1063.5 m(2)/g and were of 200-400 nm in particle size. The kinetic and isotherm data of arsenic adsorption on ZIF-8 were well fitted by pseudo-second-order and Langmuir models, respectively. The maximal adsorption capacities of As(III) and As(V) were of 49.49 and 60.03 mg/g, respectively, at T = 25 degrees C and pH 7.0. The ZIP-8 nanoparticles were stable at neutral and basic conditions. However, large amounts of Zn2+ were released into water from the sorbent at acidic condition, which dramatically hindered the adsorption of arsenic. SO42- and NO3- had no significant effect on the arsenic adsorption while the adsorption was significantly inhibited by PO43- and CO32-. X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy analysis revealed that electrostatic attraction and hydroxyl and amine groups on ZIF-8 surface played vital roles in the adsorption process. (C) 2014 Elsevier B.V. All rights reserved.
Department环境化学与生态毒理学国家重点实验室
KeywordZeolitic Imidazolate Framework-8 Arsenic Adsorption Zeta Potential Mechanisms
WOS Research AreaChemistry, Physical
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Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/32507
Collection环境化学与生态毒理学国家重点实验室
Recommended Citation
GB/T 7714
Jian, Meipeng,Liu, Bao,Zhang, Gaosheng,et al. Adsorptive removal of arsenic from aqueous solution by zeolitic imidazolate framework-8 (ZIF-8) nanoparticles[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2015,465(1):67-76.
APA Jian, Meipeng,Liu, Bao,Zhang, Gaosheng,Liu, Ruiping,&Zhang, Xiwang.(2015).Adsorptive removal of arsenic from aqueous solution by zeolitic imidazolate framework-8 (ZIF-8) nanoparticles.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,465(1),67-76.
MLA Jian, Meipeng,et al."Adsorptive removal of arsenic from aqueous solution by zeolitic imidazolate framework-8 (ZIF-8) nanoparticles".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 465.1(2015):67-76.
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