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Influences of surface-coated fulvic and humic acids on the adsorption of metal cations to SiO2 nanoparticles
Liang, L; Lv, JT; Luo, L; Zhang, J; Zhang, SZ; Zhang J(张静)
2011
发表期刊COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷号389期号:1-3页码:27-32
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
文章类型Article
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.
关键词Adsorption SiO2 Fulvic acid Humic acid Metal cations X-ray absorption spectroscopy
学科领域Chemistry
研究领域[WOS]Chemistry ; Chemistry
DOI10.1016/j.colsurfa.2011.09.002
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语种英语
研究领域[WOS]Chemistry ; Chemistry
WOS类目Chemistry, Physical
WOS记录号WOS:000296937900005
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被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/236797
专题多学科研究中心
作者单位中国科学院高能物理研究所
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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.
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