| 高镁含硼盐卤体系反常现象解析 |
| |
| 引用本文： | 乌志明,崔香梅,郑绵平.高镁含硼盐卤体系反常现象解析[J].无机化学学报,2012,28(1):30-34. |
| |
| 作者姓名： | 乌志明 崔香梅 郑绵平 |
| |
| 作者单位： | 1. 中国地质科学院矿产资源研究所、国土资源部盐湖资源与环境重点实验室,北京,100037
2. 青海大学化工学院盐湖系,西宁,810016 |
| |
| 基金项目： | 国土资源部盐湖资源与环境重点实验室开放基金、，中国地质调查局 |
| |
| 摘 要： | 高镁含硼盐卤体系中存在"过饱和溶解度"、"稀释成盐"和同名离子"增溶"等反常现象。研究发现:氯化镁溶液在中低浓度时显中性,在高浓度时显酸性,饱和时pH值小于4.5。而各种镁硼酸盐基本都是pH值大于8.0的碱性矿物。水溶液中酸碱难共存,但镁硼酸盐与氯化镁却因具有相同离子而能够在高镁含硼盐卤体系中共存。结合氯化镁溶液特殊酸度变化规律与相关相化学数据可较圆满的解释高镁含硼盐卤体系中的反常现象。
|
| 关 键 词： | 含硼盐卤 稀释成盐 过饱和溶解度 氯化镁 pH值 |
Analysis of Abnormal Phenomena in High Magnesium Boron Containing Salt Brine System |
| |
| WU Zhi-Ming,CUI Xiang-Mei and ZHENG Mian-Ping.Analysis of Abnormal Phenomena in High Magnesium Boron Containing Salt Brine System[J].Chinese Journal of Inorganic Chemistry,2012,28(1):30-34. |
| |
| Authors: | WU Zhi-Ming CUI Xiang-Mei and ZHENG Mian-Ping |
| |
| Institution: | MLR Key Laboratory of Saline Lake Resources and Environments, Institute of Mineral Resources, CAGS, Beijing 100037, China,Department of Salt Lake, School of Chemical Engineering, Qinghai University, Xining 810016, China and MLR Key Laboratory of Saline Lake Resources and Environments, Institute of Mineral Resources, CAGS, Beijing 100037, China |
| |
| Abstract: | Such phenomena as "supersaturated solubility","salt formation by dilution" and "solubility increase of homonymy ion" exist in high magnesium boron containing salt brine system.Our research indicates that the magnesium chloride solution is neutral with medium or low concentration.It shows acidic property with high concentration and the pH value is lower than 4.5 when saturated.But many types of magnesium borate minerals are alkaline ones with pH value higher than 8.0.We know in general acid and base could hardly co-exist in an aqueous solution,but magnesium borate and magnesium chloride in high magnesium boron containing salt brine system do owing to the possession of the homonymy ion.The above mentioned abnormal phenomena can be satisfactorily interpreted with special acidity change of magnesium chloride solution and some related phase chemistry data. |
| |
| Keywords: | boron containing salt brine salt formation by dilution supersaturated solubility magnesium chloride pH value |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《无机化学学报》浏览原始摘要信息 |
| 点击此处可从《无机化学学报》下载免费的PDF全文 |
|
