Flotation and adsorption of mixed cationic/anionic collectors on muscovite mica
Flotation and adsorption of mixed cationic/anionic collectors on muscovite mica
复制标题
阳离子/阴离子混合捕收剂在白云母上的浮选和吸附
DOI：
10.1016/j.mineng.2012.10.015
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发表时间：
2013-02
影响因子：
4.8
通讯作者：
Xiao Junhui
中科院分区：
文献类型：
--
作者：
Dong Faqin;Wang Li;Wang Zhen;Xiao Junhui
通过浮选试验、Zeta电位测定和芘荧光试验，研究了十二烷基胺乙酸盐（DAA）、油酸钠（NaOL）及其混合物在白云母上的吸附行为。结果表明，白云母在pH 2-12范围内具有负电荷。在NaOL单独存在下，白云母不漂浮。然而，白云母的回收率范围从约。80%（在pH 2）至50%（在pH 11）。在混合DAA-NaOL的存在下，回收率范围为约100%。80%（pH 2）至90%（pH 11）。单个阳离子捕收剂DAA可以强烈地吸附到白云母上，但通过Zeta电位测量可以检测到阴离子捕收剂NaOL没有显著的吸附。在混合体系中，由于共吸附，阳离子捕收剂和阴离子捕收剂的吸附均得到增强。混合物中NaOL的存在降低了表面和铵离子之间的静电头-头排斥，并增加了侧尾-尾疏水键。利用Materials Studio 5.0软件对DDA、NaOL和DAA-NaOL在白云母（001）面上的吸附进行了分子动力学模拟。理论计算结果与实验结果吻合较好。
The adsorption of dodecylamine acetate (DAA), sodium oleate (NaOL) and DAA–NaOL mixtures on muscovite mica were investigated through flotation tests, zeta potential measurements, and pyrene fluorescence tests. The results show that the muscovite mica has a negative charge over the pH range 2–12. The muscovite mica did not float in the presence of NaOL alone. However, the recovery of muscovite mica ranged from ca. 80% (at pH 2) to 50% (at pH 11) using DDA alone. In the presence of mixed DAA–NaOL, recovery ranged from ca. 80% (at pH 2) to 90% (at pH 11). The individual cationic collectors DAA can be adsorbed strongly onto the muscovite mica, but no significant adsorption of anionic collectors NaOL can be detected by zeta potential measurements. In the mixed systems, the adsorption of both the cationic and anionic collectors are enhanced due to co-adsorption. The presence of NaOL in the mixture decreases the electrostatic head–head repulsion between the surface and ammonium ions and increases the lateral tail–tail hydrophobic bonds. Molecular dynamics (MD) simulations were conducted to further investigate the adsorption of DDA, NaOL, and DAA–NaOL on the (001) basal planes of muscovite using Materials Studio 5.0 program. The conclusions drawn from theoretical computations are in good agreement with experimental results.
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DOI：
10.2473/shigentosozai1953.104.1209_803
发表时间：
1988
期刊：
Journal of the Mining and Metallurgical Institute of Japan
影响因子：
--
作者：
H. Nakazawa;Shuetsu Ogasawara;Hayato Sato
通讯作者：
H. Nakazawa;Shuetsu Ogasawara;Hayato Sato
影响因子：
9.9
作者：
Vidyadhar, A.;Rao, K. Hanumantha
通讯作者：
Rao, K. Hanumantha
季铵盐阳离子捕收剂在水硬石和高岭石上的浮选和吸附
DOI：
10.1016/s1003-6326(11)61046-7
发表时间：
2011-11-01
影响因子：
4.5
作者：
Jiang Hao;Xu Long-hua;Wang Xing-jie
通讯作者：
Wang Xing-jie
影响因子：
9.9
作者：
NISHIMURA, S;TATEYAMA, H;JINNAI, K
通讯作者：
JINNAI, K
影响因子：
5
作者：
H. Steele;K. Wright;M. Nygren;I. H. Hillier
通讯作者：
H. Steele;K. Wright;M. Nygren;I. H. Hillier