Interactions between variable-charge soils and acidic solutions containing fluoride: an investigation using repetitive extractions
文献类型：期刊论文
| 作者 | Zhu, MX; Jiang, X; Ji, GL |
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2004-08-01 |
| 卷号 | 276期号:1页码:159-166 |
| 关键词 | ali-haplic acrisol ferrali-haplic acrisol pH value protonation aluminum dissolution surface charge |
| ISSN号 | 0021-9797 |
| DOI | 10.1016/j.jcis.2004.03.033 |
| 通讯作者 | Zhu, MX(zhumaoxu@mail.ouc.edu.cn) |
| 英文摘要 | The reaction between two variable-charge soils and acidic solutions containing F was investigated with a repetitive extraction method. When added IF concentration was 10(-4) mol/L, F did not markedly enhance solution pH in the whole prolonged extractions, in comparison with F-free acidic solution extractions. Most of the added F was adsorbed on soil surfaces and Al-F complexes were the dominant F species in solution. With increasing extractions, the fraction of AI-F slightly increased, arising from dissolution and/or desorption of Al. In comparison with F-free acidic solution extractions, F-induced At dissolution did not significantly increase At release, probably because of the modest reactivity of metal-F surface complexes at terminal sites at low F loading. The gradual decrease in Al release in the following extractions was due to the gradual depletion of readily reactive Al-containing mineral phases. In contrast to the low F loading, at an F concentration of 10(-3) mol/L, the pH was enhanced dramatically in the initial extraction and a high pH was maintained in the following extractions. In the initial extraction, the increase in negative surface charges and solution pH seemingly depressed proton-induced Al dissolution and enhanced readsorption of some positively charged AI-F complexes, resulting in low amounts of Al and F in solution. In the following several extractions, F-induced At dissolution and desorption of Al-F complexes substantially enhanced the amounts of Al and F, and the fraction of Al-F complexes in solution. Several interconnected mechanisms such as ligand exchange, the release of OH- ions from soluble hydroxylated At groups, desorption of At as AI-F complexes, and F-induced breakdown of soil minerals were responsible for the alteration in pH, At release, and the fraction of Al-F complexes in the later extractions. A molecular-level interpretation is needed in order to address the different impacts of varying F concentration levels on soil chemistry and environments. (C) 2004 Elsevier Inc. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | ORGANIC-MATTER ; ALUMINUM SPECIATION ; DISSOLUTION KINETICS ; SOLUBILITY ; MECHANISMS ; MINERALS ; SULFATE ; PH ; AL ; PRECIPITATION |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| WOS记录号 | WOS:000222537800022 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558430 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Zhu, MX |
| 作者单位 | 1.Ocean Univ China, Dept Chem & Chem Engn, Qingdao 266003, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, MX,Jiang, X,Ji, GL. Interactions between variable-charge soils and acidic solutions containing fluoride: an investigation using repetitive extractions[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2004,276(1):159-166. |
| APA | Zhu, MX,Jiang, X,&Ji, GL.(2004).Interactions between variable-charge soils and acidic solutions containing fluoride: an investigation using repetitive extractions.JOURNAL OF COLLOID AND INTERFACE SCIENCE,276(1),159-166. |
| MLA | Zhu, MX,et al."Interactions between variable-charge soils and acidic solutions containing fluoride: an investigation using repetitive extractions".JOURNAL OF COLLOID AND INTERFACE SCIENCE 276.1(2004):159-166. |
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来源：南京土壤研究所
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