摘要
以啤酒酵母为原料制备了负载过渡金属锰(Ⅳ)的活性炭(Mn/AC),对其吸附去除水中亚甲基蓝的性能和机制进行了研究。结果表明,Mn/AC对亚甲基蓝的吸附在6 h内达到平衡,吸附去除量基本不受溶液pH值的影响,亚甲基蓝的最大吸附量可达269.97mg/g;吸附动力学过程和等温吸附过程分别符合准二级动力学模型和Langmuir模型。Mn/AC吸附去除水中亚甲基蓝主要是通过特异性吸附、单分子层吸附作用,Mn/AC表面Mn-O、羰基、醚键、羟基、羧基等基团参与了吸附亚甲基蓝的过程。
The performances and mechanisms of adsorptive removal of methylene blue(MB)by manganese(Ⅳ)–loaded activated carbon(Mn/AC)derived from brewer’s yeast were investigated in this study.The results suggested that the adsorption equilibrium was obtained within 6 h.The adsorption capacity was found to be independent on the solution pH.The maximum MB uptake was estimated to be 269.97 mg/g.The adsorption kinetics and isotherm were well described by pseudo–second–order kinetics and Langmuir isotherm,respectively.The main mechanism of MB adsorption by Mn/AC was specific and monolayer adsorption.Functional groups including Mn-O,CO,COC,COH and COOH on the Mn/AC surface were involved in the MB adsorption.
作者
康瑾
崔龙哲
蔡俊雄
KANG Jin;CUI Longzhe;CAI Junxiong(Hubei Environmental Science Research Academy,Wuhan 430072,China;School of Resource and Environment Science,Wuhan University,Wuhan 430079,China;College of Resources and Environmental Science,South Central University for Nationalities,Wuhan 430074,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2019年第5期77-81,共5页
Environmental Science & Technology
基金
国家水体污染控制与治理科技重大专项(2012ZX07104002,2015ZX07205-003)
