摘要
实验采用正交实验法对花生壳吸附工业废水中的Cu2+进行研究.首先采用不同的改性剂对花生壳进行改性,并对其进行动力学和热力学模拟.结果表明,当初始Cu^2+为600 mg·L^-1,吸附温度为20℃,花生壳加入量为6 g·L^-1,吸附时间为40 min时,Cu^2+的吸附率达到最大,吸附效果最好.动力学行为符合Lagergren准二级动力学模型.热力学表明,在不同温度下,吸附过程的ΔG<0、ΔH<0、ΔS>0,表明吸附过程是自发的放热过程.
The adsorption of Cu^2+in wastewater by peanut hull as adsorbent by orthogonal was studied.The best modification method of peanut hull was investigated experimentally,and the kinetic and thermodynamic simulations were carried out.The optimum adsorption conditions were investigated by orthogonal.The results showed that the adsorption rate of Cu^2+was the highest and the adsorption effect was the best when the initial Cu^2+was 600 mg·L^-1,the adsorption temperature was 20℃,the amount of peanut shell was 6 g·L^-1 and the adsorption time was 40 min.The dynamic behavior conforms to Lagergren quasi-second-order dynamic model.Thermodynamics shows thatΔG<0,ΔH<0,ΔS>0 at different temperatures,indicating that the adsorption process is spontaneous exothermic process.
作者
刘立华
邱红阳
赵梦凡
杨海霞
张雪
Liu Lihua;Qiu Hongyang;Zhao Mengfan;Yang Haixia;Zhang Xue(Department of Chemistry,Tangshan Normal University,Tangshan 063000,China)
出处
《南开大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第3期91-96,共6页
Acta Scientiarum Naturalium Universitatis Nankaiensis
基金
唐山师范学院化学系2019年大学生创新创业训练计划项目(CX201917)
河北省教育厅教改项目(2016GJJG181)。
关键词
花生壳
铜离子
吸附
动力学
热力学
peanut hull
copper ion
adsorb
dynamics
thermodynamics
