The cotton stalk activated carbon(AC) modified by ZnCl2/AlCl3 was prepared with high temperature pyrolysis.It was used to adsorb methyl violet.Exploring the impact about adsorption rate of methyl violet:the dosage of AC,reaction time,concentration of methyl violet,temperature and pH.And exploring the sorption kinetics,the adsorption thermodynamics and the adsorption isotherms.The results showed that the optimum adsorption conditions of methyl violet by AC were as follows:AC dosage was 40mg,the reaction time was 120min,the concentration of methyl violet was 100mg/L,the temperature was 25℃,and the pH was 7.The adsorption process accorded with the pseudo-second-order kinetic equation and Freundlich adsorption isotherm model,the total adsorption rate was controlled by the diffusion of external liquid membrane,and the adsorption process was endothermic entropy adsorption.
Wu Danping, Li Haihong, Zhang Tiantian
. Study on adsorption characteristics of methyl violet by biochar modified by ZnCl2/AlCl3[J]. New Chemical Materials, 2020
, 48(8)
: 227
-231
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.08.050
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