Influences of surface-coated fulvic and humic acids on the adsorption of metal cations to SiO2 nanoparticles
文献类型：期刊论文
| 作者 | Liang, L; Lv, JT; Luo, L; Zhang, J ; Zhang, SZ; Zhang J(张静)
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| 刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| 出版日期 | 2011 |
| 卷号 | 389期号:1-3页码:27-32 |
| 关键词 | Adsorption SiO2 Fulvic acid Humic acid Metal cations X-ray absorption spectroscopy |
| 通讯作者 | [Liang, Liang ; Lv, Jitao ; Luo, Lei ; Zhang, Shuzhen] Chinese Acad Sci, State Key Lab Environm Chem & Ecotoxicol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China ; [Zhang, Jing] Chinese Acad Sci, State Key Lab Synchrotron Radiat, Inst High Energy Phys, Beijing 100039, Peoples R China |
| 英文摘要 | Humic substances such as fulvic acid (FA) and humic acid (HA) exist universally in the environment and play an important role in the interfacial reactions of contaminants. In this study, influences of surface-coated FA and HA on the adsorption of metal cations of Cu(II), Pb(II) and Zn(II) on SiO2 nanoparticles (nano-SiO2, 20 nm) were investigated. The results showed that nano-SiO2 had high adsorption capacities for the metal cations following the sequence of Pb(II) > Cu(II) > Zn(II), irrespective of coating with FA or HA. Nano-SiO2 had a strong affinity for FA and HA, and coating with FA and HA significantly enhanced the adsorption of the metal cations on nano-SiO2. Cation adsorption on the original and coated nano-SiO2 followed the same pronounced increasing trend with increasing pH. X-ray absorption spectroscopy (XAS) analysis by taking Cu(II) as an example revealed that Cu(II) was adsorbed on nano-SiO2 by forming inner-sphere complexes; whereas its adsorption on FA/HA coated nano-SiO2 was through complexing with the hydroxyl moieties and organic functional groups of FA/HA as bridges. This work demonstrates that FA and HA can significantly change the adsorption capacities and mechanisms for metal cations and thus likely influence their behaviors in the environment. (C) 2011 Elsevier B.V. All rights reserved. |
| 学科主题 | Chemistry |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000296937900005 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/236797]  |
| 专题 | 高能物理研究所_实验物理中心 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Liang, L,Lv, JT,Luo, L,et al. Influences of surface-coated fulvic and humic acids on the adsorption of metal cations to SiO2 nanoparticles[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2011,389(1-3):27-32. |
| APA | Liang, L,Lv, JT,Luo, L,Zhang, J,Zhang, SZ,&张静.(2011).Influences of surface-coated fulvic and humic acids on the adsorption of metal cations to SiO2 nanoparticles.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,389(1-3),27-32. |
| MLA | Liang, L,et al."Influences of surface-coated fulvic and humic acids on the adsorption of metal cations to SiO2 nanoparticles".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 389.1-3(2011):27-32. |
入库方式： OAI收割
来源：高能物理研究所
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