KMS Institute of soil and water conservation Chinese Academy of Sciences
| 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. | |
| 文章类型 | Article |
| 2018 | |
| 发表期刊 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| ISSN | 0013-936X |
| 通讯作者邮箱 | flinc629@hotmail.com ; wenfeng.tan@hotmail.com |
| 卷号 | 52期号:7页码:4099-4107 |
| 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. |
| 学科领域 | Engineering ; Environmental Sciences & Ecology |
| DOI | 10.1021/acs.est.7b06281 |
| 收录类别 | SCI |
| 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 |
| 项目资助者 | 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] |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | sbir.nwafu.edu.cn/handle/361005/8266 |
| 专题 | 水保所科研产出--SCI_2018--SCI |
| 通讯作者 | 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. |
| 作者单位 | 1.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 |
| 推荐引用方式 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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