CAJ | 학술논문

研究十二烷基三甲基氯化铵(DTAC)和十六烷基三甲基氯化铵(CTAC)对一水硬铝石和高岭石的浮选行为.通过残余浓度法测定吸附等温线,荧光探针法和Zeta电位测试方法研究季铵型阳离子捕收剂在矿物表面的吸附机理.浮选结果表明:将DTAC和CTAC作为捕收剂,一水硬铝石的浮选回收率随着pH的增大而增加,而高岭石的浮选回收率随着pn的增大反而下降.当捕收剂的碳链增长时,矿物浮选回收率提高,但高岭石的增加幅度小于一水硬铝石的.在低浓度范围内,阳离子表面活性剂通过静电作用吸附在一水硬铝石表面,而对于高岭石,还存在离子交换作用.当浓度增大时,阳离子表面活性剂通过碳链间疏水缔合作用在两种矿物表面进一步吸附.矿物表面微极性研究表明:CTAC的疏水性比DTAC强,相同溶液浓度下CTAC在一水硬铝石表面能形成比在高岭石表面更大的胶团,这也说明阳离子表面活性剂碳链的增长对一水硬铝石吸附的影响要大,与浮选结果相吻合.
연구십이완기삼갑기록화안(DTAC)화십륙완기삼갑기록화안(CTAC)대일수경려석화고령석적부선행위.통과잔여농도법측정흡부등온선,형광탐침법화Zeta전위측시방법연구계안형양리자포수제재광물표면적흡부궤리.부선결과표명:장DTAC화CTAC작위포수제,일수경려석적부선회수솔수착pH적증대이증가,이고령석적부선회수솔수착pn적증대반이하강.당포수제적탄련증장시,광물부선회수솔제고,단고령석적증가폭도소우일수경려석적.재저농도범위내,양리자표면활성제통과정전작용흡부재일수경려석표면,이대우고령석,환존재리자교환작용.당농도증대시,양리자표면활성제통과탄련간소수체합작용재량충광물표면진일보흡부.광물표면미겁성연구표명:CTAC적소수성비DTAC강,상동용액농도하CTAC재일수경려석표면능형성비재고령석표면경대적효단,저야설명양리자표면활성제탄련적증장대일수경려석흡부적영향요대,여부선결과상문합.
The flotation and adsorption behaviors of dodecyltrimethylammonium chloride(DTAC) and cetyltrimethylammonium chloride(CTAC) on diaspore and kaolinite were studied.Solution depletion methods were used to determine adsorption isotherms.Fluorescence probe test along with Zeta potential measurement was also conducted for further investigation into the adsorption of quaternary amines at the mineral-water interface.The results show that the flotation recovery of kaolinite decreases with an increase in pH when DTAC and CTAC are used as collectors,while diaspore is on the contrary.As the carbon chain length of the collectors increases,the flotation recoveries of minerals increase.However,the increment rate of kaolinite is significantly lower than that of diaspore.In the low surfactant concentration range,the cationic surfactants adsorb readily on diaspore surfaces just due to electrostatic interactions.As for kaolinite surfaces,ion exchange process also exists.With a further increase in surfactant concentration,the adsorption was ascribed to the hydrophobic association of chain-chain interactions.Micro-polarity of mineral surfaces study shows that CTAC has a better hydrophobic characteristic than DTAC.Larger aggregates are formed with CTAC on diaspore than on kaolinite in the same solution concentration.The results also indicate that the chain length of cationic surfactants has a greater influence on the adsorption of diaspore than on kaolinite,which is consistent with the flotation result.