ISWC OpenIR  > 水保所科研产出--SCI  > 2018--SCI
Proton and Copper Binding to Humic Acids Analyzed by XAFS Spectroscopy and Isothermal Titration Calorimetry
Jinling Xu1,2; Luuk K. Koopal3,4; Linchuan Fang1; Juan Xiong3; Wenfeng Tan1,3; Fang, LC; Tan, WF (reprint author), Chinese Acad Sci, Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Tan, WF (reprint author), Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China.
SubtypeArticle
2018
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
description.correspondentemailflinc629@hotmail.com ; wenfeng.tan@hotmail.com
Volume52Issue:7Pages:4099-4107
AbstractProton and copper (Cu) binding to soil and lignite-based humic acid (HA) was investigated by combining X-ray absorption fine structure (XAFS) spectroscopy, isothermal titration calorimetry (ITC), and nonideal-competitive-adsorption (NICA) modeling. NICA model calculations and XAFS results showed that bidentate and monodentate complexation occurred for Cu binding to HA. The site-type-specific thermodynamic parameters obtained by combining ITC measurements and NICA calculations revealed that copper binding to deprotonated carboxylic-type sites was entropically driven and that to deprotonated phenolic-type sites was driven by entropy and enthalpy. Copper binding to HA largely depended on the site-type and coordination environment, but the thermodynamic binding mechanisms for Cu binding to the specific site-types were similar for the different HAs studied. By comparing the site-type-specific thermodynamic parameters of HA-Cu complexation with those of low molar mass organic acids, the Cu coordination could be further specified. Bidentate carboxylic Cu complexes made the dominating contributions to Cu binding to HA. The present study not only yields molecular-scale mechanisms of ion binding to carboxylic- and phenolic-type sites of HA but also provides the new insight that the universal nature of site-type-specific thermodynamic data enables quantitative estimation of the binding structures of heavy metal ions to humic substances.
Subject AreaEngineering ; Environmental Sciences & Ecology
DOI10.1021/acs.est.7b06281
Indexed BySCI
Publication Place1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Language英语
WOS IDWOS:000429385700030
PublisherAMER CHEMICAL SOC
Funding OrganizationNational Natural Science Foundation of China [41425006, 41330852, 41571314, 41101218] ; National Natural Science Foundation of China [41425006, 41330852, 41571314, 41101218] ; National Key Basic Research Program of China [2015CB150504] ; National Key Basic Research Program of China [2015CB150504] ; CAS "Light of West China" Program [XAB2016A03] ; CAS "Light of West China" Program [XAB2016A03]
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8266
Collection水保所科研产出--SCI_2018--SCI
Corresponding AuthorFang, LC; Tan, WF (reprint author), Chinese Acad Sci, Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Tan, WF (reprint author), Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China.
Affiliation1.Chinese Acad Sci, Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China
4.Wageningen Univ & Res, Phys Chem & Soft Matter, Stippeneng 4, NL-6708 WE Wageningen, Netherlands
Recommended Citation
GB/T 7714
Jinling Xu,Luuk K. Koopal,Linchuan Fang,et al. Proton and Copper Binding to Humic Acids Analyzed by XAFS Spectroscopy and Isothermal Titration Calorimetry[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2018,52(7):4099-4107.
APA Jinling Xu.,Luuk K. Koopal.,Linchuan Fang.,Juan Xiong.,Wenfeng Tan.,...&Tan, WF .(2018).Proton and Copper Binding to Humic Acids Analyzed by XAFS Spectroscopy and Isothermal Titration Calorimetry.ENVIRONMENTAL SCIENCE & TECHNOLOGY,52(7),4099-4107.
MLA Jinling Xu,et al."Proton and Copper Binding to Humic Acids Analyzed by XAFS Spectroscopy and Isothermal Titration Calorimetry".ENVIRONMENTAL SCIENCE & TECHNOLOGY 52.7(2018):4099-4107.
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