Thermodynamic and Kinetic Studies of Effective Adsorption of 2,4,6-trichlorophenol onto Calcine Mg/Al-CO3 Layered Double Hydroxide
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2016年第6期
论文作者：张丹 ZHAO Guoqing YU Jingang YAN Tao ZHU Mingyue 焦飞鹏
文章页码：1211 - 1218
摘 要：Adsorption of 2, 4, 6-trichlorophenol（TCP） onto the calcined Mg/Al-CO3 layered double hydroxide（CLDH） was investigated. The prepared Mg/Al-CO3 layered double hydroxide（LDH） and CLDH were characterized by powder X-ray diffraction（XRD） and thermo gravimetric analyzer-differential scanning calorimeters（TG-DSC）. Moreover, 2,4,6-trichlorophenol（TCP） was removed effectively（94.7% of removal percentage in 9h） under the optimized experimental conditions. The adsorption kinetics data fitted the pseudosecond-order model well. The Freundlich, Langmuir, and Tempkin adsorption models were applied to the experimental equilibrium adsorption data at different temperatures of solution. The adsorption data fitted the Freundlieh adsorption isotherm with good values of the correlation coefficient. A mechanism of the adsorption process is proposed according to the intraparticle diffusion model, which indicates that the overall rate of adsorption can be described as three steps.
张丹，ZHAO Guoqing，YU Jingang，YAN Tao，ZHU Mingyue，焦飞鹏
College of Chemistry and Chemical Engineering,Central South University
摘 要：Adsorption of 2, 4, 6-trichlorophenol（TCP） onto the calcined Mg/Al-CO3 layered double hydroxide（CLDH） was investigated. The prepared Mg/Al-CO3 layered double hydroxide（LDH） and CLDH were characterized by powder X-ray diffraction（XRD） and thermo gravimetric analyzer-differential scanning calorimeters（TG-DSC）. Moreover, 2,4,6-trichlorophenol（TCP） was removed effectively（94.7% of removal percentage in 9h） under the optimized experimental conditions. The adsorption kinetics data fitted the pseudosecond-order model well. The Freundlich, Langmuir, and Tempkin adsorption models were applied to the experimental equilibrium adsorption data at different temperatures of solution. The adsorption data fitted the Freundlieh adsorption isotherm with good values of the correlation coefficient. A mechanism of the adsorption process is proposed according to the intraparticle diffusion model, which indicates that the overall rate of adsorption can be described as three steps.
关键词：
