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Investigations on Mg-borate kinetics and mechanisms during evaporation, dilution and crystallization by Raman spectroscopy
Peng, Jiaoyu ; Chen, Jing ; Dong, Yaping ; Li, Wu
2018-06-15
Source PublicationSPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
AbstractRaman spectra of boron-concentrated, diluted, and corresponding mother solutions of brine were recorded at 298.15 K. The main polyborate anions present and their interactions in brine during evaporation and dilution were proposed according to the Raman spectra. The polyborate anions B(OH)(3), B3O3(OH)(-)(4),B5O6(OH)(-)(4), and B6O7(OH)(2)(-)(6) were found to be the main forms in boron-concentrated brine with B303(OH)4 ion being the principal form. Diluting brines with water accelerated depolymerization of B5O6(OH)(-)(4) and B6O7(OH)(2-)(6) anions into B (OH)(3) and B3O3(OH)(-)(4) ions and generated OH- ions, causing the pH of the solutions to increase from 42 to almost 8.0. Mg-borates precipitated from all diluted solutions could be classified as either hexaborates or triborates. A mechanism of solid phase transformation was also proposed and discussed based on Raman spectra analysis and solid species and solution pH data. (C) 2018 Elsevier B.V. All rights reserved.
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/7201
Collection中国科学院青海盐湖研究所
Recommended Citation
GB/T 7714
Peng, Jiaoyu,Chen, Jing,Dong, Yaping,et al. Investigations on Mg-borate kinetics and mechanisms during evaporation, dilution and crystallization by Raman spectroscopy[J]. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,2018.
APA Peng, Jiaoyu,Chen, Jing,Dong, Yaping,&Li, Wu.(2018).Investigations on Mg-borate kinetics and mechanisms during evaporation, dilution and crystallization by Raman spectroscopy.SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY.
MLA Peng, Jiaoyu,et al."Investigations on Mg-borate kinetics and mechanisms during evaporation, dilution and crystallization by Raman spectroscopy".SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2018).
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