【摘要】 研究了改性竹炭对钯(Ⅱ)的吸附性能及影响因素。研究表明:竹炭对钯(II)有良好的吸附性能,平衡吸附量为18.0 mg/g;竹炭对钯的吸附动力学可用准一级动力学描述,表观吸附速率常数k298=2.39×10-4/s,表观吸附活化能Ea=40.9 kJ/mol;钯在竹炭上的吸附符合Freundlich吸附等温线;温度升高,吸附量减小,表明吸附为放热过程;测得吸附热为:ΔH=-39.8 kJ/mol。更多还原

【Abstract】 Adsorption behavior and influence factors of the modified bamboo-charcoal for Pd(Ⅱ) were studied.Experimental results show that bamboo-charcoal has a good adsorption ability for Pd(Ⅱ),adsorption capacity and adsorption rate of equilibrium are 18.0 mg/g and 96.1%,respectively.The studying kinetics shows that the adsorption kinetics of bamboo-charcoal for Pd(Ⅱ) can be described by pseudo first-order kinetics.The adsorption apparent rate constant k is equal to 2.39×10-4 /s and activation energy Ea is equal to 40.9 kJ/mol at the temperature of 298 K.Freundlich isotherm model is well obeyed.The studying thermodynamic shows that the adsorption process of bamboo-charcoal for Pd(Ⅱ) is an exothermic process.The heat of adsorption(ΔH) is equal to-39.8 kJ/mol.更多还原