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Investigations on Mg-borate kinetics and mechanisms during evaporation, dilution and crystallization by Raman spectroscopy
Peng, Jiaoyu1,2; Chen, Jing1,2,4; Dong, Yaping1,2; Li, Wu1,3
2018-06-15
Source PublicationSPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume199Pages:367-375
SubtypeArticle
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.
KeywordRaman Spectrum Boron-concentrated Brine Evaporation Dilution Borates Transformation Mechanism
WOS HeadingsScience & Technology ; Technology
WOS KeywordSALT LAKE BRINE ; AQUEOUS-SOLUTION ; POLYBORATE EQUILIBRIA ; BORIC-ACID ; FT-IR ; POLYANIONS ; CHEMISTRY ; IONS
Indexed BySCI
Language英语
WOS Research AreaSpectroscopy
WOS SubjectSpectroscopy
WOS IDWOS:000432767100046
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6719
Collection中国科学院青海盐湖研究所
Corresponding AuthorDong, Yaping
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Qinghai, Peoples R China
2.Qinghai Engn & Technol Res Ctr Comprehens Utiliza, Xining 810008, Qinghai, Peoples R China
3.Key Lab Salt Lake Resources Chem Qinghai Prov, Xining 810008, Qinghai, Peoples R China
4.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
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,2018,199:367-375.
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,199,367-375.
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 199(2018):367-375.
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