摘要
研究了洋姜杆粉末对水中中性红的吸附最佳条件、吸附动力学和吸附热力学特性。结果表明:其吸附行为符合Freundlich等温模型。在试验温度下,吸附焓变ΔH>0,吉布斯自由能ΔG<0,熵变ΔS>0,可见该吸附为自发、吸热过程。吸附动力学表明其吸附更符合Lagergren准二级模型,其速率常数k_(298K)=196.96 g/(mg·min),k_(304K)=36.092 g/(mg·min)。
Jerusalem artichoke rod as raw material,the most suitable adsorption condition,kinetics and thermodynamics characterristic of its neutral red adsorption were studied. The results manifested that the equilibrium process was describled by the Freundlish isothermal model. Within the scope of the experimental temperature,adsorption enthalpy changes ΔH 〉0,entropy changes ΔS 〉0,and gibbs free energy changes ΔG〈 0,It is indicated that the adsorption thermodynamics of neutral red is a initiative and exothermic process. The kinetics of the behavior indicates better accord with the Lagergren second kinetics reaction. It＇s rate constant K（298K）= 196. 96g /（ mg·min）,K（304K）=36. 092g /（ mg·min）.
出处
《延安大学学报（自然科学版）》
2016年第1期39-41,共3页
Journal of Yan'an University：Natural Science Edition
关键词
洋姜杆粉末
吸附
中性红
动力学
热力学
Jerusalem artichoke rod powder
adsorption
neutral red
kinetics
thermodynamics
