|
|
| A Raman Investigation on the Boron form Occurring in Salt Lake Brine during Evaporation |
| 投稿时间：2019-04-10 修订日期：2019-05-22 |
| DOI：10.12119/j.yhyj.201902008 |
| 中文关键词: |
| 英文关键词:Raman spectrum Da Qaidam Salt Lake evaporation polyborate species interaction mechanism |
| 基金项目: |
| 作者 | 单位 | E-mail | | PENG Jiao-yu* | Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining,810008, China
Qinghai Engineering and Technology Research Center of Salt Lake Resources Development, Xining,810008, China | pengjy@isl.ac.cn | | CHEN Jing | Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining,810008, China
Qinghai Engineering and Technology Research Center of Salt Lake Resources Development, Xining,810008, China
University of Chinese Academy of Sciences, Beijing,100049, China | | | WANG Xing-peng | Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining,810008, China
Qinghai Engineering and Technology Research Center of Salt Lake Resources Development, Xining,810008, China
University of Chinese Academy of Sciences, Beijing,100049, China | | | DONG Ya-ping | Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining,810008, China
Qinghai Engineering and Technology Research Center of Salt Lake Resources Development, Xining,810008, China | | | LI Wu | Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining,810008, China
Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining,810008, China | |
|
| 摘要点击次数: 797 |
| 全文下载次数: 584 |
| 中文摘要: |
| |
| 英文摘要: |
| Boron resources are abundant in the Da Qaidam Salt Lake of the Qaidamu basin in China, which has generated significant attention due to the presence of polyborate species in brine from this lake. In this study, Raman spectroscopy was used to investigate the existing form of boron in brine during evaporation. MgO·2B2O3-H2O, MgO·2B2O3-MgCl2 -H2O, and MgO·2B2O3-MgSO4-H2O solutions were also studied to determine the influence of boron concentration, pH, and electrolytes on the borate speciation from brine. The mononborates B(OH)3 and B(OH)-4 were found to be the only forms present in natural salt lake brine. Brine evaporation promoted the formation of the polyborate anions B3O3(OH)-4,B5O6(OH)-4, and B6O7(OH)2-6 and also promoted the disappearance of the B(OH)-4 ion from brine at boron concentrations of more than 11 g/L B2O3. The pentaborate ion B5O6(OH)-4 was sensitive to the solution pH and appeared only at pH values less than 8.0. Meanwhile, the hexaborate ion B6O7(OH)2-6 was observed to be more dependent on the electrolyte magnesium chloride due to its special properties, such as promoting boron accumulation, lowering solution pH, and also its strong affinity for water molecules, which were all beneficial for the polymerization of borate ions in brine. Interaction mechanisms between polyborate anions during evaporation are also proposed herein.ake; evaporation; polyborate species; interaction mechanism. |
|
查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
