摘要
甲基橙(MO)是具有单偶氮基团的典型酸性偶氮染料,应用较为广泛,其分子结构中具有芳香结构,不易被分解,处理难度较大。以MO溶液为处理对象,用高锰酸钾氧化制备改性活性炭材料进行吸附试验,分别探讨了活性炭投加量、MO初始质量浓度、溶液pH值、吸附时间等因素对脱色效率、化学需氧量(COD)和MO去除率的影响。结果表明:当MO初始质量浓度为20 mg/L,改性活性炭的投用量为0.5 g/L时,在pH=9.00、反应时间为60 min条件下,MO的去除率、脱色效率和COD_(cr)去除率可分别达到98.8%、98%和98.9%,相较于未改性的活性炭,吸附效果得到较大提升。
Methyl orange(MO)is a typical and widely used acidic azo dye featuring a mono-azo group.However,its aromatic molecular structure resists degradation,making it difficult to remove from wastewater.In this study,activated carbon was modified through oxidation with potassium permanganate and used as an adsorbent for MO removal.The effects of several key parameters(including adsorbent dosage,initial MO concentration,solution pH,and adsorption time)were systematically evaluated in terms of decolorization efficiency,chemical oxygen demand(COD)and MO removal rate.The results demonstrated that under optimal conditions(initial MO concentration of 20 mg/L,modified activated carbon dosage of 0.5 g/L,pH=9.00,and reaction time of 60 min),the MO removal rate,decolorization efficiency,and COD_(cr) removal reached 98.8%,98.0%,and 98.9%,respectively.Compared with unmodified activated carbon,the modified material exhibited significantly enhanced adsorption performance.
作者
李诗莹
谈乐乐
刘静
张楠
丁宗庆
LI Shiying;TAN Lele;LIU Jing;ZHANG Nan;DING Zongqing(School of Chemistry and Environmental Engineering,Hanjiang Normal University,Shiyan 442000,China;Shiyan Key Laboratory of Biological Resources and Eco-environmental Protection(Hanjiang Normal University),Shiyan 442000,China)
出处
《武汉工程大学学报》
2025年第6期607-613,共7页
Journal of Wuhan Institute of Technology
基金
汉江师范学院2023年科学研究计划项目(2023B18)。
关键词
改性活性炭
甲基橙
偶氮染料
高锰酸钾氧化
modified activated carbon
methyl orange
azo dyes
potassium permanganate oxidation
