摘要
用玉米芯吸附水中的Cr(Ⅵ),研究了pH、投加量、振荡时间、初始浓度和温度对吸附效果的影响,并用动力学、热力学方程和吸附等温线对实验数据进行拟合。结果表明,pH=1时,玉米芯对Cr(Ⅵ)的吸附效果最佳;吸附过程符合准一级动力学模型,Freundlich与Langmuir等温吸附模型均能很好地描述吸附过程,高温时,Freundlich模型的拟合效果更好;对热力学参数ΔH,ΔG,ΔS的计算表明,该吸附过程是吸热、熵增的自发过程。
The adsorption performance of chromium（ Ⅵ） by corncob was investigated considering the factors of pH,dosage,contacting time,initial mass concentration and temperature. The adsorption isotherms were linearized,and the dynamics and thermodynamics equation for the adsorption were discussed. The results showed that corncob had the best adsorption performance for chromium（ Ⅵ） with pH = 1. The adsorption process followed pseudo-first-order model. Freundlich and Langmuir model could describe the adsorption process well,but the effect with Freundlich model was better in high temperature. Thermodynamic parameters such as ΔH,ΔG and ΔS were calculated,and the results indicated that the adsorption process was endothermic,entropy-driving and spontaneous.
作者
荆肇乾
王玥
秦帆
唐燕华
陈治
黄亚楠
JING Zhao-qian;WANG Yue;QIN Fan;TANG Y-an-hua;CHEN Zhi;HUANG Ya-nan(College of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China)
出处
《应用化工》
CAS
CSCD
北大核心
2018年第6期1114-1118,共5页
Applied Chemical Industry
基金
国家科技支撑计划项目(2015BAL02B04)
住房和城乡建设部科学技术项目(2015-K7-012)
南京林业大学大学生创新创业训练计划项目(2017NFUSPITP181)
