【摘要】 采用间歇试验研究了硝基氯苯和2,4-二硝基氯苯在粉末活性炭(PAC)上的吸附特性,并分析了二者的吸附动力学和吸附热力学行为。结果表明,硝基氯苯和2,4-二硝基氯苯在PAC上的吸附行为符合Freundlich方程,当PAC投量为20 mg/L、吸附时间为120 min时,硝基氯苯和2,4-二硝基氯苯的平衡浓度分别为0.027 9、0.77 mg/L。硝基氯苯和2,4-二硝基氯苯在PAC上的吸附行为符合假二级反应动力学,且吸附能力随反应温度的降低而增强。在实际应用PAC控制硝基氯苯和2,4-二硝基氯苯时,应根据化合物的性质酌情考虑PAC的最佳投量。更多还原

【Abstract】 Batch experiments were conducted to investigate the adsorption of nitrochlorobenzene and 2,4-dinitrochlorobenzene on powdered activated carbon(PAC) and analyze the kinetics and thermo-dynamics of their adsorption.The results indicate that the adsorption behaviors of nitrochlorobenzene and 2,4-dinitrochlorobenzene on PAC are fitted to Freundlich equation.Equilibrium concentrations of nitro-chlorobenzene and 2,4-dinitrochlorobenzene are 0.027 9 mg/L and 0.77 mg/L respectively when PAC dosage is 20 mg/L and adsorption time is 120 min.The adsorption behaviors of nitrochlorobenzene and 2,4-dinitrochlorobenzene on PAC follow the pseudo-second-order kinetics,and the adsorption ability is enhanced as the reaction temperature decreases.The optimal PAC dosage should be considered according to compound property when PAC is used to control nitrochlorobenzene and 2,4-dinitrochlorobenzene in water.更多还原