阴阳离子捕收剂在长石与石英表面的吸附特性
来源期刊：中南大学学报(自然科学版)2013年第4期
论文作者：张钊 冯启明 王维清 徐龙华 黄阳
文章页码：1312 - 1318
Key words：feldspar; quartz; anion-cation collector; flotation; zeta potential; pyrene fluorescence
Abstract: The adsorption characteristics of feldspar and quartz monomineral using dodecyl amine (DDA, cationic collector) and sodium dodecyl sulfonate ( SDS, anionic collector) as collector have been studied through pure minerals flotation, zeta potential and pyrene fluorescence. The results of pure minerals flotation under condition of pH=2.0 show that the hydrophobicity of feldspar is stronger than that of quartz in both single and anion-cation collector at the same concentration，and mixed collector makes them have stronger hydrophobicity than single collector. The zeta potential tests indicate that the potentiodynamic of mineral surface integrally shifts to positive direction in cationic collector, while it moves to negative direction in anionic collector. When the molar ratio of the anion-cation collector close to 1:1, the mineral potentiodynamic has no obvious difference to itself in solution of pH 2.0, 2.5 and 9.0. The pyrene fluorescence results under condition of pH=2.0 show that there is a negative correlation between polarity of mineral surface and dosage of collector in low concentration when using single collector and the layer formed in such a manner is sporadic. The polarity of mineral surface begins to increase after the micelle formed in solution of single collector，while the polarity of mineral continues to decrease in mixed collector. At the same condition, compared with single collector the polarity of mineral surface is stronger and the dosage of forming micelle concentration is much lower in anion-cation collector. In a whole, the polarity of quartz is stronger than feldspar in single and anion-cation collector at the same concentration.
张钊，冯启明，王维清，徐龙华，黄阳
(西南科技大学 固体废弃物处理与资源化教育部重点实验室，四川 绵阳，621010)
摘 要：
关键词：
ZHANG Zhao, FENG Qiming, WANG Weiqing, XU Longhua, HUNAG Yang
(Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education,Southwest University of Science and Technology, Mianyang 621010, China)
Abstract:The adsorption characteristics of feldspar and quartz monomineral using dodecyl amine (DDA, cationic collector) and sodium dodecyl sulfonate ( SDS, anionic collector) as collector have been studied through pure minerals flotation, zeta potential and pyrene fluorescence. The results of pure minerals flotation under condition of pH=2.0 show that the hydrophobicity of feldspar is stronger than that of quartz in both single and anion-cation collector at the same concentration，and mixed collector makes them have stronger hydrophobicity than single collector. The zeta potential tests indicate that the potentiodynamic of mineral surface integrally shifts to positive direction in cationic collector, while it moves to negative direction in anionic collector. When the molar ratio of the anion-cation collector close to 1:1, the mineral potentiodynamic has no obvious difference to itself in solution of pH 2.0, 2.5 and 9.0. The pyrene fluorescence results under condition of pH=2.0 show that there is a negative correlation between polarity of mineral surface and dosage of collector in low concentration when using single collector and the layer formed in such a manner is sporadic. The polarity of mineral surface begins to increase after the micelle formed in solution of single collector，while the polarity of mineral continues to decrease in mixed collector. At the same condition, compared with single collector the polarity of mineral surface is stronger and the dosage of forming micelle concentration is much lower in anion-cation collector. In a whole, the polarity of quartz is stronger than feldspar in single and anion-cation collector at the same concentration.
Key words:feldspar; quartz; anion-cation collector; flotation; zeta potential; pyrene fluorescence
