Effect of soil fulvic and humic acid on binding of Pb to goethite-water interface: Linear additivity and volume fractions of HS in the Stern layer
文献类型：期刊论文
| 作者 | Xiong, Juan1; Koopal, Luuk K.1,2; Weng, Liping1,3; Wang, Mingxia1; Tan, Wenfeng1,4 |
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2015-11-01 |
| 卷号 | 457页码:121-130 |
| 关键词 | Humic Substance Humic Acid Fulvic Acid Iron Oxide Goethite Pb Binding Model Particle Size Volume Fractions |
| 文献子类 | Article |
| 英文摘要 | The effects of soil fulvic (JGFA) and humic acid (JGHA) on Pb binding to goethite were investigated with batch experiments and modeling. The CD-MUSIC and NICA-Donnan model could describe the Pb binding to, respectively, the binary Pb-goethite and Pb-HS systems. The adsorption of humic substances (HS) on goethite strongly depended on pH and was promoted by Pb binding. The mass amount of adsorbed JGFA (mg/g) was smaller than that of JGHA, but when expressed in number of particles/nm(2) the JGFA adsorption was higher. At low pH and low initial Pb concentration the linear additivity rule always underestimated Pb adsorption to goethite-HS complex, which was caused by the strong effect of adsorbed HS on the electrostatic potentials in the Stern layer region. At other conditions except the 450 mg/L JGHA in the 0.5 mmol/L Pb system the additivity rule predicted the experimental results reasonably well, and at high pH nearly all Pb is bound to goethite. At the same mass adsorbed, the effect of JGFA on Pb adsorption to goethite is stronger than that of JGHA, due to the fact that the JGFA particles were primarily adsorbed in the Stern layer, whereas JGHA particles were present in both Stern layer and diffuse layer. Therefore, the electrostatic potential profile of the goethite-JGFA complex is considerably different from that of goethite-JGHA complex and affects Pb binding strongly. (C) 2015 Elsevier Inc. All rights reserved. |
| WOS关键词 | INTRINSIC PROTON AFFINITY ; REACTIVE SURFACE GROUPS ; NATURAL ORGANIC-MATTER ; ION-BINDING ; CHARGE-DISTRIBUTION ; METAL (HYDR)OXIDES ; PB(II) SORPTION ; LEAD BINDING ; IRON-OXIDES ; ADSORPTION |
| 语种 | 英语 |
| WOS记录号 | WOS:000359450000015 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/67875]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Tan, Wenfeng |
| 作者单位 | 1.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China 2.Wageningen Univ, Phys Chem & Soft Matter, NL-6703 HB Wageningen, Netherlands 3.Wageningen Univ, Dept Soil Qual, NL-6700 EC Wageningen, Netherlands 4.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiong, Juan,Koopal, Luuk K.,Weng, Liping,et al. Effect of soil fulvic and humic acid on binding of Pb to goethite-water interface: Linear additivity and volume fractions of HS in the Stern layer[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2015,457:121-130. |
| APA | Xiong, Juan,Koopal, Luuk K.,Weng, Liping,Wang, Mingxia,&Tan, Wenfeng.(2015).Effect of soil fulvic and humic acid on binding of Pb to goethite-water interface: Linear additivity and volume fractions of HS in the Stern layer.JOURNAL OF COLLOID AND INTERFACE SCIENCE,457,121-130. |
| MLA | Xiong, Juan,et al."Effect of soil fulvic and humic acid on binding of Pb to goethite-water interface: Linear additivity and volume fractions of HS in the Stern layer".JOURNAL OF COLLOID AND INTERFACE SCIENCE 457(2015):121-130. |
入库方式： OAI收割
来源：地理科学与资源研究所
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