摘要
以秸秆为原料制备生物炭,利用FeSO_(4)溶液对其进行改性处理,制得铁改性秸秆生物炭(BC-Fe)。并通过吸附实验研究了BC-Fe对废水中Cr^(6+)的吸附特性,结果表明:(1)在37℃、pH=7、吸附时间为48 h的实验条件下,0.2000 g BC-Fe对Cr^(6+)浓度为20 mg/L的100 mL溶液的吸附率和吸附容量分别为92.81%和9.3 mg/g;(2)BC-Fe对Cr^(6+)的吸附在48 h达到平衡,准二级动力模型和颗粒内扩散动力模型对结果的拟合均达到显著效果水平;(3)傅里叶红外光谱显示铁改性生物炭主要是依靠生物炭表面的-OH基团进行吸附。
The straw was used as raw material to prepare biochar,and FeSO_(4) solution was used to modify it,and iron modified straw biochar(BC-Fe)was prepared.The adsorption characteristics of BC-Fe for Cr^(6+)in wastewater were studied by adsorption experiments.The results showed that under the experimental conditions of 37℃,pH=7 and adsorption time of 48 h,the adsorption rate and capacity of 0.2000 g BC-Fe for 100 mL solution with Cr^(6+)concentration of 20 mg/L were 92.81%and 9.3 mg/g,respectively.The adsorption of Cr^(6+)by BC-Fe reached equilibrium at 48 h,and the fitting results of quasi-second-order kinetic model and intra-particle diffusion kinetic model reached significant level.Fourier transform infrared spectroscopy showed that the adsorption of iron-modified biochar mainly depended on-OH groups on the surface of biochar.
作者
卢灵慧
王费
张喆倩
方芳
王娟
LU Ling-hui;WANG Fei;ZHANG Zhe-qian;FANG Fang;WANG Juan(School of Biological and Chemical Engineering,Jiaxing University,Jiaxing,Zhejiang 314001;Tongling Institute of Environmental Protection Science,Anhui Tongling 244000,China)
出处
《广州化工》
CAS
2023年第5期153-156,共4页
GuangZhou Chemical Industry
基金
嘉兴学院大学生科研训练计划(SRT)项目(8517221495)。
关键词
改性生物炭
含铬废水
吸附动力学
modified biochar
chrome-containing wastewater
adsorption kinetics
