摘要
花生壳资源丰富,吸附重金属离子有较大优势。为此,研究了花生壳对溶液中Cu(Ⅱ)的吸附特性,考察了溶液pH值、Cu(Ⅱ)初始浓度和吸附时间对吸附率的影响。结果表明:溶液pH值、Cu(Ⅱ)初始浓度和吸附时间对花生壳吸附Cu(Ⅱ)有较大影响,吸附平衡时间约为120 min;花生壳对Cu(Ⅱ)的吸附过程符合准二级吸附动力学模型和Langmuir等温吸附模型,不同温度下吸附过程的ΔG0<0,ΔH0>0,ΔS0>0,表明花生壳对Cu(Ⅱ)的吸附过程是一个自发的吸热过程。
The adsorption capability of peanut shell for Cu(Ⅱ) ion was studied,and the effects of solution pH value,initial concentration of Cu(Ⅱ) ion and adsorption time on the adsorption rate were investigated.Results showed that the solution pH value,initial concentration of Cu(Ⅱ) ion and adsorption time had significant effects on the adsorption capability of peanut shell for Cu(Ⅱ)ion,and the adsorption equilibrium time was 120 min.Besides,the adsorption process obeyed pseudo- second- order kinetics equation and Langmuir adsorption isothermal model.The adsorption processes at different temperatures were dominated by △C^0 <0,△H^0 >0,and △S^0> 0,which revealed that the adsorption process of peanut shell for Cu(Ⅱ) was a spontaneous endothermic process.
出处
《材料保护》
CAS
CSCD
北大核心
2014年第7期69-71,9,共3页
Materials Protection
