CAJ | 학술논문

研究了蛭石对结晶紫的吸附特性,考察了溶液pH值、吸附剂用量、搅拌时间、结晶紫浓度、温度对吸附平衡的影响.结果表明,室温下溶液pH=6,蛭石用量为0.2000 g时蛭石对结晶紫的吸附效果最佳,吸附率超过94%.拟二级速率方程能很好地描述蛭石对结晶紫的吸附动力学,相关系数(R~2)达到0.9996.不同温度下蛭石对结晶紫的吸附等温线均符合Langmuir方程,相关系数(R~2)都在0.9898以上.吉布斯自由能变化△G＜0,且随着温度升高,吸附量增大,表明该反应是自发进行的吸热反应.
연구료질석대결정자적흡부특성,고찰료용액pH치、흡부제용량、교반시간、결정자농도、온도대흡부평형적영향.결과표명,실온하용액pH=6,질석용량위0.2000 g시질석대결정자적흡부효과최가,흡부솔초과94%.의이급속솔방정능흔호지묘술질석대결정자적흡부동역학,상관계수(R~2)체도0.9996.불동온도하질석대결정자적흡부등온선균부합Langmuir방정,상관계수(R~2)도재0.9898이상.길포사자유능변화△G＜0,차수착온도승고,흡부량증대,표명해반응시자발진행적흡열반응.
The adsorptive property of Crystal Violet(CV) on vermiculite was studied,the effect of its adsorption equilibrium was investigated under different conditions.The results showed that the best adsorption conditions are pH=6 of solution and 0.2000 g vermiculite at room temperature,and the adsorption ratio of CV on the vermiculite is more than 94%.Pseudo second order model can best describe the reaction rate with 0.9996 of the correlation coefficient (R~2).The adsorption isotherms for CV follow Langmiur isotherm model,which R~2 is over 0.9898.The change of Gibbs free energy below zero,and the equilibrium adsorption capacity increases with increasing temperaure from 25 ℃ to 55 ℃,indicating that the adsorption process is spontaneous and endothermic.