麦秸生物质炭对Pb(Ⅱ)的吸附研究  

Adsorption of Pb(Ⅱ)by Wheat Straw Biochar

作　　者：赵欢欢 宋香琳 程灿 张利亚 王留成[1] ZHAO Huanhuan;SONG Xianglin;CHENG Can;ZHANG Liya;WANG Liucheng(School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China;Henan Bodun Biotechnology Company Limited,Zhengzhou 450001,China)

机构地区：[1]郑州大学化工学院,郑州450001 [2]河南博顿生物科技有限公司,郑州450001

出　　处：《材料导报》2020年第S02期112-116,共5页Materials Reports

摘　　要：以小麦秸秆为原料,利用低温热解制备小麦秸秆生物质炭,分别使用SEM、FTIR、BET对生物质炭进行表征。考察了生物质炭对Pb(Ⅱ)的吸附性能,发现该吸附过程是一个自发的吸热过程,符合Langmuir模型,随着温度的升高,生物质炭的吸附能力增大。吸附动力学研究发现准二级动力学模型可以很好地描述麦秸生物质炭吸附Pb(Ⅱ)的过程,该过程可能受表面吸附和颗粒内扩散共同控制,为化学吸附。Wheat straw biochar was prepared using a low-temperature pyrolysis device,and the biomass char was characterized by SEM,FTIR,and BET,respectively.Through the research of isothermal adsorption process,it was found that the adsorption of Pb(Ⅱ)by wheat straw biochar accorded with Langmuir model,and it was a spontaneous endothermic process.The investigation of adsorption kinetics found that the pseudo-second-order kinetic model can well describe the process of wheat straw biochar adsorption of Pb(Ⅱ).This adsorption process is a complex process and may be controlled by surface adsorption and intra-particle diffusion together with chemisorption.

关 键 词：小麦秸秆 生物质炭 吸附 Pb(Ⅱ) 

分 类 号：X712[环境科学与工程—环境工程]