Kurnakovite deposits on the Qinghai-Tibet Plateau (II): an investigation from chemical kinetics of chloropinnoite dissolution
文献类型：期刊论文
| 作者 | Li, X.1; Gao, S.2,3; Liu, Z.2,3; Xia, S.2,3 |
| 刊名 | ENVIRONMENTAL EARTH SCIENCES
 |
| 出版日期 | 2013-10-01 |
| 卷号 | 70期号:3页码:1151-1158 |
| 关键词 | Kurnakovite Chloropinnoite Kinetics And Mechanism Geochemical Kinetics Qinghai-tibet Plateau |
| 文献子类 | Article |
| 英文摘要 | Lakes on the Qinghai-Tibet Plateau (QTP) are of particular interest to researchers because of their unusual high concentrations of lithium (Li), boron (B), and potassium (K). Kurnakovite, a member of the inderite group, is well-distributed on the QTP, however, the geochemical mechanisms of kurnakovite transformation requires further identification and clarification. This study aims to elucidate the geochemical mechanisms of kurnakovite deposits on the QTP from chloropinnoite dissolution using chemical kinetic and spectroscopic techniques. The new borate, chloropinnoite 2MgO center dot A 2B(2)O(3) center dot A MgCl2 center dot A 14H(2)O, was obtained from the natural concentrated salt lake brine on the QTP. The kinetics of chloropinnoite dissolved in 4.5 % (wt%) boric acid solution at 303, 313, and 323 K were investigated. The characterization of the phase transitions and the kinetics were carried out by chemical titration analysis, X-ray powder diffraction spectrometry, Fourier Transform Infrared (FT-IR), and Raman spectrometry. The results demonstrate that similar kinetic processes occur at all three temperatures and can be divided into dissolution, supersaturation, and precipitation, according to three distinct kinetic curves. Kurnakovite was the final phase transition (terminal secondary mineral) within the chloropinnoite-boric acid solution. The dissolution rate of chloropinnoite (the dissolution stage) could be described by second order pseudo-homogeneous reaction model. According to the spectroscopy data, geochemical mechanism of kurnakovite was identified. The new geochemical hypothesis well explains the geochemical mechanism of kurnakovite minerals on the QTP. |
| WOS关键词 | ACID ; CALIFORNIA ; ORE ; USA |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000324252900014 |
| 源URL | [http://ir.isl.ac.cn/handle/363002/4442]  |
| 专题 | 青海盐湖研究所_青海盐湖研究所知识仓储 中国科学院青海盐湖研究所 |
| 作者单位 | 1.Shaanxi Normal Univ, Coll Tourism & Environm, Xian 710062, Shaanxi, Peoples R China 2.Shaanxi Normal Univ, Coll Chem & Mat, Xian 710062, Peoples R China 3.Chinese Acad Sci, Xian Branch, Inst Salt Lakes, Xian 710043, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, X.,Gao, S.,Liu, Z.,et al. Kurnakovite deposits on the Qinghai-Tibet Plateau (II): an investigation from chemical kinetics of chloropinnoite dissolution[J]. ENVIRONMENTAL EARTH SCIENCES,2013,70(3):1151-1158. |
| APA | Li, X.,Gao, S.,Liu, Z.,&Xia, S..(2013).Kurnakovite deposits on the Qinghai-Tibet Plateau (II): an investigation from chemical kinetics of chloropinnoite dissolution.ENVIRONMENTAL EARTH SCIENCES,70(3),1151-1158. |
| MLA | Li, X.,et al."Kurnakovite deposits on the Qinghai-Tibet Plateau (II): an investigation from chemical kinetics of chloropinnoite dissolution".ENVIRONMENTAL EARTH SCIENCES 70.3(2013):1151-1158. |
入库方式： OAI收割
来源：青海盐湖研究所
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