Effects of silicate-bacteria pretreatment on desiliconization of magnesite by reverse flotation

doi:10.1016/j.colsurfa.2018.02.022

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	Effects of silicate-bacteria pretreatment on desiliconization of magnesite by reverse flotation
	Teng, Qing 1,2; Feng, Yali 1; Li, Haoran 2
	2018-05-05
发表期刊	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN	0927-7757
卷号	544 页码:60-67
摘要	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.
关键词	Silicate Bacteria Magnesite Reverse Flotation Dodecylamine
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1016/j.colsurfa.2018.02.022
收录类别	SCI
语种	英语
关键词[WOS]	MICROBIALLY INDUCED SEPARATION ; PAENIBACILLUS-POLYMYXA ; MINERAL DISSOLUTION ; QUARTZ ; HEMATITE ; RECOVERY ; ADHESION
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
项目资助者	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记录号	WOS:000428257100008
引用统计
文献类型	期刊论文
条目标识符	http://ir.ipe.ac.cn/handle/122111/24136
专题	生化工程国家重点实验室
作者单位	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
推荐引用方式 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.