Decontamination of Sr(II) on Magnetic Polyaniline/Graphene Oxide Composites: Evidence from Experimental, Spectroscopic, and Modeling Investigation
Hu, BW; Qu, MQ; Hu, QY; Sun, YB; Sheng, GD; Hu, J; Ma, JY
2017
发表期刊ACS SUSTAINABLE CHEMISTRY & ENGINEERING
ISSN2168-0485
卷号5期号:8页码:6924-6931
文章类型期刊论文
摘要The interaction of Sr(II) on magnetic polyaniline/graphene oxide (PANI/GO) composites was elucidated by batch, EXAFS, and surface complexation modeling techniques. The batch experiments showed that decreased uptake of Sr(II) on magnetic PANI/GO composites was observed with increasing ionic strength at pH <5.0, whereas no effect of ionic strength on Sr(II) uptake was shown at pH >5.0. The maximum uptake capacity of magnetic PANI/GO composites derived from the Langmuir model at pH 3.0 and 293 K was 37.17 mg/g. The outer sphere surface complexation controlled the uptake of Sr(II) on magnetic PANI/GO composites at pH 3.0 due to the similarity to the EXAFS spectra of Sr2+ in aqueous solutions, but the Sr(II) uptake at pH 7.0 was inner sphere complexation owing to the occurrence of the Sr-C shell. According to the analysis of surface complexation modeling, uptake of Sr(II) on magnetic PANI/GO composites was well simulated using a diffuse layer model with an outer-sphere complex (SOHSr2+ species) and two inner sphere complexes (i.e., (SO)(2)Sr(OH)(-) and SOSr+ species). These findings are crucial for the potential application of magnetic nanomaterials as a promising candidate for the uptake of radionuclides for environmental remediation.
关键词Reduced Graphene Oxide Ray-absorption Spectroscopy Humic Substance Interaction Nanoscale Zerovalent Iron Layered Double Hydroxide Hydrous Ferric-oxide Aqueous-solutions Combined Batch Carbonaceous Nanofibers Enhanced Sequestration
DOI10.1021/acssuschemeng.7b01126
关键词[WOS]REDUCED GRAPHENE OXIDE ; RAY-ABSORPTION SPECTROSCOPY ; HUMIC SUBSTANCE INTERACTION ; NANOSCALE ZEROVALENT IRON ; LAYERED DOUBLE HYDROXIDE ; HYDROUS FERRIC-OXIDE ; AQUEOUS-SOLUTIONS ; COMBINED BATCH ; CARBONACEOUS NANOFIBERS ; ENHANCED SEQUESTRATION
收录类别SCI
语种英语
WOS记录号WOS:000407410900062
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28595
专题中科院上海应用物理研究所2011-2018年
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Hu, BW,Qu, MQ,Hu, QY,et al. Decontamination of Sr(II) on Magnetic Polyaniline/Graphene Oxide Composites: Evidence from Experimental, Spectroscopic, and Modeling Investigation[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2017,5(8):6924-6931.
APA Hu, BW.,Qu, MQ.,Hu, QY.,Sun, YB.,Sheng, GD.,...&Ma, JY.(2017).Decontamination of Sr(II) on Magnetic Polyaniline/Graphene Oxide Composites: Evidence from Experimental, Spectroscopic, and Modeling Investigation.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,5(8),6924-6931.
MLA Hu, BW,et al."Decontamination of Sr(II) on Magnetic Polyaniline/Graphene Oxide Composites: Evidence from Experimental, Spectroscopic, and Modeling Investigation".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 5.8(2017):6924-6931.
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