| Effects of silicate-bacteria pretreatment on desiliconization of magnesite by reverse flotation | |
| Teng, Qing1,2; Feng, Yali1; Li, Haoran2 | |
| 2018-05-05 | |
| Source Publication | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| ISSN | 0927-7757 |
| Volume | 544Pages:60-67 |
| Abstract | Combined with silicate-bacteria pretreatment, the reverse flotation was utilized to achieve desiliconization of magnesite ore using dodecylamine as a collector. The reverse flotation experiments were conducted on magnesite ore with and without silicate-bacteria pretreatment. The reverse flotation experiments showed that the SiO2 grade of the concentrate decreased to 2.56% with silicate-bacteria pretreatment while the SiO2 grade of the concentrate was 4.61% without silicate-bacteria pretreatment. The concentrate was characterized using XRD and XRF, and the results indicated that the silicate-bacteria could dissolve the silicate minerals in the magnesite ore. The improved role of silicate-bacteria pretreatment on reverse flotation was investigated using microscopic view, zeta-potential, FTIR and SEM-EDX studies. The silicate minerals were dissolved as attested through microscopic view and FT-IR studies. Zeta potential indicated that the magnesite surface became hydrophilic by biopretreatment. SEM-EDX confirmed that there was polysaccharide secreted by the silicate bacteria attached on the magnesite surface. |
| Keyword | Silicate Bacteria Magnesite Reverse Flotation Dodecylamine |
| Subtype | Article |
| WOS Headings | Science & Technology ; Physical Sciences |
| DOI | 10.1016/j.colsurfa.2018.02.022 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | MICROBIALLY INDUCED SEPARATION ; PAENIBACILLUS-POLYMYXA ; MINERAL DISSOLUTION ; QUARTZ ; HEMATITE ; RECOVERY ; ADHESION |
| WOS Research Area | Chemistry |
| WOS Subject | Chemistry, Physical |
| Funding Organization | Major science and technology program for water pollution control and treatment(2015ZX07205-003) ; China Ocean Mineral Resources Research & Development Program(DY125-15-T-08) ; National Natural Science Foundation of China(21176026 ; 21176242) |
| WOS ID | WOS:000428257100008 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/24136 |
| Collection | 生化工程国家重点实验室 |
| Affiliation | 1.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Teng, Qing,Feng, Yali,Li, Haoran. Effects of silicate-bacteria pretreatment on desiliconization of magnesite by reverse flotation[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2018,544:60-67. |
| APA | Teng, Qing,Feng, Yali,&Li, Haoran.(2018).Effects of silicate-bacteria pretreatment on desiliconization of magnesite by reverse flotation.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,544,60-67. |
| MLA | Teng, Qing,et al."Effects of silicate-bacteria pretreatment on desiliconization of magnesite by reverse flotation".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 544(2018):60-67. |
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