Selective adsorption of benzhydroxamic acid on fluorite rendering selective separation of fluorite/calcite
Selective adsorption of benzhydroxamic acid on fluorite rendering selective separation of fluorite/calcite
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苯异羟肟酸在萤石上的选择性吸附实现萤石/方解石的选择性分离
DOI：
10.1016/j.apsusc.2017.11.093
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发表时间：
2018-03
影响因子：
6.7
通讯作者：
Hu Yuehua
中科院分区：
文献类型：
--
作者：
Jiang Wei;Gao Zhiyong;Khoso Sultan Ahmed;Gao Ji;e;Sun Wei;Pu Wei;Hu Yuehua
Fluorite, a chief source of fluorine in the nature, usually coexists with calcite mineral in ore deposits. Worldwide, flotation techniques with a selective collector and/or a selective depressant are commonly preferred for the separation of fluorite from calcite. In the present study, an attempt was made to use benzhydroxamic acid (BHA) as a collector for the selective separation of fluorite from calcite without using any depressant. Results obtained from the flotation experiments for single mineral and mixed binary minerals revealed that the BHA has a good selective collecting ability for the fluorite when 50 mg/L of BHA was used at pH of 9. The results from the zeta potential and X-ray photoelectron spectroscopy (XPS) indicated that the BHA easily chemisorbs onto the fluorite as compared to calcite. Crystal chemistry calculations showed the larger Ca density and the higher Ca activity on fluorite surface mainly account for the selective adsorption of BHA on fluorite, leading to the selective separation of fluorite from calcite. Moreover, a stronger hydrogen bonding with BHA and the weaker electrostatic repulsion with BHA−also contribute to the stronger interaction of BHA species with fluorite surface.
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DOI：
10.1006/jcis.1998.5466
发表时间：
1998-06
期刊：
--
影响因子：
--
作者：
Yongqiang Lu;J. Drelich;Jan D. Miller
通讯作者：
Yongqiang Lu;J. Drelich;Jan D. Miller
影响因子：
4.2
作者：
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Hu Yuehua;and Ruan Chi;Zhenghe Xu
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DOI：
10.1016/s1003-6326(14)63428-2
发表时间：
2014-09-01
影响因子：
4.5
作者：
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Hu, Yue-hua
DOI：
10.1016/j.colsurfa.2013.07.030
发表时间：
2013-09
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects
影响因子：
--
作者：
Kaipeng Wang;Qi Liu
通讯作者：
Kaipeng Wang;Qi Liu