摘要
通过静态吸附实验,采用原子吸收分光光度计,测定并分析商业活性炭及其改性态对水溶液中六价铬的吸附去除能力。结果表明:六价铬的吸附性能取决于溶液的起始p H值、铬的浓度、活性炭的投加量、吸附时间和温度。活性炭及其改性态对六价铬的最大去除率分别达97.67%,99.87%,最大吸附量分别为4.75,5.95 mg/g。2种活性炭对六价铬的吸附是一个自发的吸热过程,Freundlich等温吸附与准一级吸附动力学模型能很好地拟合六价铬的吸附过程。
Atom Absorption Spectrometry was used to analyze the concentrations of Cr（ VI） after the adsorp-tion by raw and modified activated carbon in solutions by batch experiment. The Cr （VI ） sorption was de-pendent on pH,contact time,initial concentration of Cr（ VI） ,adsorbent dose,and temperature. The maximum removal efficiency of Cr（ VI） was 97. 67% and 99. 87% ,and the maximum adsorption capacity was found to be 4. 75 and 5.95 mg/g for raw and modified activate carbons, respectively. Thermodynamic parameters indi-cated that the adsorption process was endothermic and spontaneous in nature. The Freundlich adsorption iso-therm and pseudo second - order kinetics models could describe the adsorption process well.
出处
《湖北理工学院学报》
2017年第3期38-42,51,共6页
Journal of Hubei Polytechnic University
关键词
原子吸收分光光度法
改性活性炭
六价铬
吸附
分析
atom adsorption spectrometry
modified activated carbon
Cr（ VI）
adsorption
analysis
