乙二胺改性柚皮粉对甲基橙的吸附机理探究  

Study on the Adsorption Mechanism of Ethylenediamine Modified Pomelo Peel Powder to Methyl Orange

作　　者：何宇 黄香衍 高树涛 王正果 王霞 周唯[1] He Yu;Huang Xiangyan;Gao Shutao;Wang Zhengguo;Wang Xia;Zhou Wei(School of Chemical and Environmental Engineering,Hunan Institute of Technology,Hengyang 421002,China)

机构地区：[1]湖南工学院化学与环境工程学院,湖南衡阳421002

出　　处：《云南化工》2024年第2期115-119,共5页Yunnan Chemical Technology

基　　金：湖南省教育厅科学研究项目(22C0618,21C0815);衡阳市科技局指导性计划项目(20232316887);湖南工学院科学研究资助项目(2020HY009,2018HY011);湖南工学院教研教改项目(JY202217);湖南省大学生创新创业训练计划项目(S202311528151,S202311528109);湖南工学院大学生创新创业训练计划项目(CX2023191)。

摘　　要：以柚皮粉为原料,经环氧氯丙烷氯代和乙二胺接枝,成功制备了乙二胺改性柚皮粉吸附剂,并将其用于甲基橙废水处理。实验结果表明,乙二胺改性柚粉对甲基橙的最优吸附条件为pH=5,投加量为0.05 g,4 h后平衡,吸附率为92.77%,同比未改性柚皮粉的吸附率提升了62.91%。其吸附过程符合准二阶动力学方程和Langmuir模型,以化学吸附为主,常温下为自发放热过程。研究结果可为改性农林废弃物对阴离子染料废水处理提供参考。Taking pomelo peel powder as raw material,ethylenediamine-modified pomelo peel powder adsorbents were successfully prepared by epichlorohydrin chlorination and ethylenediamine grafting,and used for methyl orange dye wastewater treatment.The experimental results show that the optimal adsorption conditions for methyl orange by ethylenediamine modified pomelo peel powder are pH=5,the dosage is 0.05 g,and the adsorption equilibrium is reached after 4 h,and the adsorption rate is 92.77%,which is 62.91%higher than that of unmodified pomelo peel powder.Adsorption process is in line with the quasi-second-order kinetic equation and Langmuir model,and chemisorption is the main method.It is a spontaneous exothermic process at room temperature.This study can provide reference for the treatment of anionic dye wastewater with modified agroforestry waste.

关 键 词：乙二胺 改性柚皮粉 甲基橙 吸附 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]