Institutional Repository of Chinese Academy of Sciences, Institute of Plasma Physics, Hefei 230031, Anhui, Peoples R China
| Interaction of Th(IV) with graphene oxides: Batch experiments, XPS investigation, and modeling | |
Xu, Huan1,2; Li, Guang1,3; Li, Jie2; Chen, Changlun2; Ren, Xuemei2
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| 2016 | |
| 发表期刊 | JOURNAL OF MOLECULAR LIQUIDS
 |
| 摘要 | The high surface area, the pH-dependent highly negative charge, and the abundant surface functional groups make graphene oxides (GOs) efficient for cation immobilization. In this study, the performance of GOs in Th(IV) immobilization as a function of contact time, pH, ionic strength, GO concentration, humic add (HA) and temperature was investigated by batch experiments. The sorption data of pH effect at different ionic strengths and HA concentrations were fitted by diffusion layer model (DLM). The results showed that the whole sorption process was dependent on pH and independent of ionic strength, suggesting that surface complexation was the dominant sorption mechanism over ionic exchange. Ionic strength did not affect the macroscopic sorption of Th(IV) on GOs but did influence the microscopic distribution of the adsorbed Th(IV) species on GOs. The strong acidic groups played a dominant role in Th(IV) sorption on GOs. The adsorbed Th(IV) mainly presented as EXOHTh4+ and EXOTh(OH) (2+) on GO surfaces. XPS analysis further provided evidence that the oxygen-containing functional groups on GO surfaces participated in the sorption of Th(IV). HA enhanced the sorption of Th(IV) on GOs mainly by the increase of the stability of GOs rather than the increase in the negative surface charge of GOs or the formation of Th(IV)-HA-GO surface complexes. Based on the Langmuir isotherm model, the maximum sorption capacity of GOs was 252.5 mu mol/g, which is higher than those of the common sorbents. This work highlights the possible application of GOs in Th(IV) contamination management. (C) 2015 Elsevier B.V. All rights reserved. |
| 文章类型 | Article |
| 关键词 | Thorium(Iv) Graphene Oxides Sorption Desorption Dlm |
| WOS标题词 | Science & Technology ; Physical Sciences |
| DOI | 10.1016/j.molliq.2015.11.022 |
| 关键词[WOS] | MULTIWALLED CARBON NANOTUBES ; NATURAL ORGANIC-MATTER ; AQUEOUS-SOLUTIONS ; IONIC-STRENGTH ; FULVIC-ACID ; HUMIC-ACID ; NA-MONTMORILLONITE ; ACTIVATED CARBON ; FOREIGN IONS ; U(VI) IONS |
| 收录类别 | SCI |
| 语种 | 英语 |
| 项目资助者 | NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; NSFC(21307135 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21377132 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 21477133 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 91326202 ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) ; 21225730) |
| WOS研究方向 | Chemistry ; Physics |
| WOS类目 | Chemistry, Physical ; Physics, Atomic, Molecular & Chemical |
| WOS记录号 | WOS:000369462300010 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/21801 |
| 专题 | 中科院等离子体物理研究所 |
| 作者单位 | 1.Anhui Univ, Sch Phys & Mat Sci, Hefei 230601, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Peoples R China 3.Anhui Key Lab Informat Mat & Devices, Hefei 230601, Peoples R China |
| 第一作者单位 | 中科院等离子体物理研究所 |
| 推荐引用方式 GB/T 7714 | Xu, Huan,Li, Guang,Li, Jie,et al. Interaction of Th(IV) with graphene oxides: Batch experiments, XPS investigation, and modeling[J]. JOURNAL OF MOLECULAR LIQUIDS,2016,213(无):58-68. |
| APA | Xu, Huan,Li, Guang,Li, Jie,Chen, Changlun,&Ren, Xuemei.(2016).Interaction of Th(IV) with graphene oxides: Batch experiments, XPS investigation, and modeling.JOURNAL OF MOLECULAR LIQUIDS,213(无),58-68. |
| MLA | Xu, Huan,et al."Interaction of Th(IV) with graphene oxides: Batch experiments, XPS investigation, and modeling".JOURNAL OF MOLECULAR LIQUIDS 213.无(2016):58-68. |
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