CAS OpenIR
Correlation of surface oxidation with xanthate adsorption and pyrite flotation
Niu, Xiaopeng1,5; Chen, Jianhua2,3; Li, Yuqiong2,3; Xia, Liuyin4; Li, Li1; Sun, Heyun1; Ruan, Renman1
2019-11-30
Source PublicationAPPLIED SURFACE SCIENCE
ISSN0169-4332
Volume495Pages:9
AbstractVarious studies have emphasized the importance of surface oxidation of sulfide minerals with regard to xanthate adsorption and their flotation response. However, the correlation between pyrite surface oxidation, xanthate adsorption and its flotation response has not been clearly established. The complexity lies in various intermediate sulfur oxidation products in different solution conditions. Thus, investigation of sulfur oxidation behavior is the key to understand pyrite oxidation. Ion chromatography (IC) and high performance liquid chromatography (HPLC) results showed an increase in the total amounts of occurring sulfur species with increasing slurry pH. Meanwhile, the ratio of S-0/sulfur oxyanions was to become lower; X-ray Photoelectron Spectroscopy (XPS) identified the oxidized pyrite surface was rich in SO42- and FeOOH. Both the contact angle results and single mineral flotation data indicated that the more pyrite surface oxidized, the lower hydrophobicity and floatability were. Time-of-flight secondary ion mass spectroscopy (Tof-SIMS) was adopted to analyse xanthate adsorption on the surface of pyrite under conditions of either sufficient oxidation or on freshly polished surface which is assumed little oxidation. A significantly lower intensities of C4H9O and C4H9OCSS was found on the intensely oxidized pyrite surface, indicating xanthate adsorption had strong selectivity on FeS2 rather than FeOOH. The experimental results were further confirmed by theoretical calculation. The self-consistent charge density functional tight binding (SCC-DFTB) calculations indicated that the distances between the xanthate S atoms and surface Fe atoms of FeOOH were larger than the atomic radius of S-Fe. Essentially, the different electron configurations of their Fe atoms led to the selective adsorption of xanthate on FeOOH and FeS2 surfaces in terms of the coordination chemistry theory. This work provides valuable implications for understanding the correlation of surface oxidation, xanthate adsorption and its floatation behavior to mediate pyrite flotation.
KeywordSurface oxidation Xanthate adsorption Pyrite flotation
DOI10.1016/j.apsusc.2019.07.153
Language英语
WOS KeywordSELECTIVE FLOTATION ; CHEMISTRY ; STATE ; FLOATABILITY ; THIOSULFATE ; CHALCOCITE ; MECHANISMS ; GALENA ; OXYGEN ; GOLD
Funding ProjectNational Natural Science Foundation of China[51674231] ; National Natural Science Foundation of China[51574092] ; National Natural Science Foundation of China[51764002] ; National Natural Science Foundation of China[51874106] ; Key Research Program of Chinese Academy of Sciences[ZDRW-ZS-2018-1]
WOS Research AreaChemistry ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
Funding OrganizationNational Natural Science Foundation of China ; Key Research Program of Chinese Academy of Sciences
WOS IDWOS:000486177700049
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/30895
Collection中国科学院过程工程研究所
Corresponding AuthorRuan, Renman
Affiliation1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing, Peoples R China
2.Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China
3.Guangxi Univ, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, Nanning 530004, Peoples R China
4.Saskatchewan Res Council, Saskatoon, SK, Canada
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Niu, Xiaopeng,Chen, Jianhua,Li, Yuqiong,et al. Correlation of surface oxidation with xanthate adsorption and pyrite flotation[J]. APPLIED SURFACE SCIENCE,2019,495:9.
APA Niu, Xiaopeng.,Chen, Jianhua.,Li, Yuqiong.,Xia, Liuyin.,Li, Li.,...&Ruan, Renman.(2019).Correlation of surface oxidation with xanthate adsorption and pyrite flotation.APPLIED SURFACE SCIENCE,495,9.
MLA Niu, Xiaopeng,et al."Correlation of surface oxidation with xanthate adsorption and pyrite flotation".APPLIED SURFACE SCIENCE 495(2019):9.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Niu, Xiaopeng]'s Articles
[Chen, Jianhua]'s Articles
[Li, Yuqiong]'s Articles
Baidu academic
Similar articles in Baidu academic
[Niu, Xiaopeng]'s Articles
[Chen, Jianhua]'s Articles
[Li, Yuqiong]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Niu, Xiaopeng]'s Articles
[Chen, Jianhua]'s Articles
[Li, Yuqiong]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.