硅藻土对腐殖酸的吸附动力学研究  

The Research of Adsorption Kinetics of Humic Acid on Diatomite

作　　者：邓建绵[1] 米晓[1] 赵艳[1] 

机构地区：[1]华北水利水电大学环境与市政工程学院,河南郑州450011

出　　处：《信阳师范学院学报（自然科学版）》2016年第2期185-188,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：水利部科技项目(DRCYSN(2012)473);贵州省水利科技项目(KT201315)

摘　　要：利用准一级动力学模型、准二级动力学模型、Elovich模型和双常数模型对硅藻土吸附腐殖酸进行动力学拟合,利用Langmuir、Freundlich、Temkin和Koble-Corrigan模型对硅藻土吸附腐殖酸进行热力学研究.动力学研究结果表明,与其他模型相比,线性准二级动力学模型更适合于描述硅藻土对腐殖酸的吸附,该吸附反应为化学吸附;热力学研究表明,Langmuir方程更加适合描述硅藻土对腐殖酸的吸附行为,ΔH0为正值,表明该吸附反应为吸热反应,ΔG0为负值,表明该吸附过程可自发进行.This work conducted the pseudo first order kinetics fitting,pseudo second order kinetics fitting,Elovich kinetics fitting and double constant kinetics fitting for HA adsorption onto Diatomite,and the hermodynamic study by Langmuir equation,Freundlich equation,Temkin equation and Koble-Corrigan equation were also used. The results showed that the adsorption reaction belonged to chemistry adsorption and the pseudo second order kinetic model was more suitable to describe the adsorption reaction than other models. The results showed that the Langmuir equation was more suitable to describe the adsorption reaction than other equations. The adsorption reaction was endothermic and spontaneous reaction because the ΔG0was negative and theΔH0was positive.

关 键 词：硅藻土 腐殖酸 吸附动力学 吸附热力学 

分 类 号：TQ424.22[化学工程]