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Proton and Copper Binding to Humic Acids Analyzed by XAFS Spectroscopy and Isothermal Titration Calorimetry

文献类型：期刊论文

作者Tan, WF (reprint author), Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China.; Jinling Xu1,3; Luuk K. Koopal2,4; Linchuan Fang3; Juan Xiong2; Wenfeng Tan2,3; 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.
刊名ENVIRONMENTAL SCIENCE & TECHNOLOGY
出版日期2018
卷号52期号:7页码:4099-4107
ISSN号0013-936X
DOI10.1021/acs.est.7b06281
文献子类Article
英文摘要Proton 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.
学科主题Engineering ; Environmental Sciences & Ecology
出版地1155 16TH ST, NW, WASHINGTON, DC 20036 USA
语种英语
WOS记录号WOS:000429385700030
出版者AMER CHEMICAL SOC
资助机构National 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] ; National 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]
源URL[http://ir.iswc.ac.cn/handle/361005/8266]  
专题水保所科研产出--SCI_2018--SCI
通讯作者Tan, WF (reprint author), Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China.; 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.
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China
3.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
4.Wageningen Univ & Res, Phys Chem & Soft Matter, Stippeneng 4, NL-6708 WE Wageningen, Netherlands
推荐引用方式
GB/T 7714		 Tan, WF ,Jinling Xu,Luuk K. Koopal,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 Tan, WF .,Jinling Xu.,Luuk K. Koopal.,Linchuan Fang.,Juan Xiong.,...&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 Tan, WF ,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.

入库方式： OAI收割

来源：水土保持研究所

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