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Spectral Analysis of Trace Fluorine Phase in Phosphogypsum
Zhao Hong-tao1,2,3; Li Hui-quan1; Bao Wei-jun1; Wang Chen-ye1; Li Song-geng3; Lin Wei-gang3
2015-08-01
Source PublicationSPECTROSCOPY AND SPECTRAL ANALYSIS
ISSN1000-0593
Volume35Issue:8Pages:2333-2338
AbstractPhosphogypsum, which contains more than 90% of the calcium sulfate dihydrate(CaSO4 . 2H(2)O), is a kind of important renewable gypsum resources. Unlike the natural gypsum, however, phosphorus, fluorine, organic matter and other harmful impurities in phosphogypsum limit its practical use. To ascertain the existence form, content and phase distribution of trace fluoride in phosphogypsum has important theoretical values in removing trace fluoride effectively. In this present paper, the main existence form and phase distribution of trace fluoride in phosphogypsum was investigated by the combination of X-ray photoelectron spectroscopy (XPS) and Electron microprobe analysis (EMPA). The results show that trace fluoride phase mainly includes NaF, KF, CaF2, K2SiF6, Na2SiF6, Na3AlF6, K3AlF6, AlF3 . 3H(2)O, AlF2.3 (OH)(0.7) . H2O, Ca-5 (PO4)(3)F, Ca-10 (PO4)(6) F-2 Among them, 4. 83% of fluorine exists in the form of fluoride (NaF, KF, CaF2); Accordingly, 8. 43% in the form of fluoride phosphate(Ca-5 (PO4)(3)F, C-10 (PO4)(6) F-2); 12. 21% in the form of fluorine aluminate(Na3AlF6, K-3 AlF6); 41. 52% in the form of fluorosilicate ( K2SiF6 , Na2SiF6); 33. 02% in the form of aluminum fluoride with crystal water ( AlF3 . 3H(2)O, AlF2.3 (OH) (0.7) . H2O). In the analysis of phase constitution for trace elements in solid samples, the method of combining XPS and EMPA has more advantages. This study also provides theoretical basis for the removal of trace fluorine impurity and the effective recovery of fluorine resources.
KeywordPhosphogypsum Fluorine Phase Distribution Xps Empa
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.3964/j.issn.1000-0593(2015)08-2333-06
Indexed BySCI
Language英语
WOS KeywordGAS DESULFURIZATION GYPSUM ; CARBONATION
WOS Research AreaSpectroscopy
WOS SubjectSpectroscopy
WOS IDWOS:000359272300053
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19444
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhao Hong-tao,Li Hui-quan,Bao Wei-jun,et al. Spectral Analysis of Trace Fluorine Phase in Phosphogypsum[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2015,35(8):2333-2338.
APA Zhao Hong-tao,Li Hui-quan,Bao Wei-jun,Wang Chen-ye,Li Song-geng,&Lin Wei-gang.(2015).Spectral Analysis of Trace Fluorine Phase in Phosphogypsum.SPECTROSCOPY AND SPECTRAL ANALYSIS,35(8),2333-2338.
MLA Zhao Hong-tao,et al."Spectral Analysis of Trace Fluorine Phase in Phosphogypsum".SPECTROSCOPY AND SPECTRAL ANALYSIS 35.8(2015):2333-2338.
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