摘要
以落叶作为原材料制备生物炭材料,以Pb(Ⅱ)溶液模拟重金属污染的工业废水,通过单因素实验考察生物炭材料的添加量、pH值、吸附时间、吸附温度、初始浓度对重金属铅离子去除效果的影响,通过拟合确定吸附过程的吸附动力学和吸附等温线,通过竞争性吸附模拟去除多种重金属离子的效果,通过循环再生研究生物炭材料的再生性能。通过实验研究,发现生物炭材料对重金属铅离子的最佳去除率可达到84.8%,最大饱和吸附量为33 mg/g,吸附是一个受反应速率和扩散控制的复杂过程,拟二级动力方程和Langmuir等温吸附模型能很好地拟合此过程,在铜离子存在的情况下,生物炭仍然对Pb(Ⅱ)有较高的去除率,且经过3次循环再生后,去除率仍可达到64.8%。
Leaves were used as raw materials to prepare biochar materials,and Pb(Ⅱ)solution was used to simulate industrial wastewater polluted by heavy metals.The effects of the addition amount,pH value,adsorption time,adsorption temperature and initial concentration of biochar materials on the removal effect of heavy metal lead ions were investigated through single-factor experiments.The adsorption kinetics and adsorption isotherm of the adsorption process were determined by fitting.The effect of removing heavy metal ions was simulated by competitive adsorption,and the regeneration performance of biochar was studied by recycling.Through experimental study,it was found that the optimal removal rate of heavy metal lead ions from biochar materials could reach 84.8%,and the maximum saturated adsorption capacity was 33 mg/g.Adsorption was a complex process controlled by reaction rate and diffusion,and the pseudo-second-order dynamic equation and Langmuir isothermal adsorption model could well fit this process.Biochar still has a high removal rate of Pb(Ⅱ),and after 3 cycles of regeneration,the removal rate can still reach 64.8%.
作者
寇鹏斌
Kou Pengbin(Lanzhou Petrochemical Technical University,Lanzhou 730000,China)
出处
《山东化工》
CAS
2024年第15期28-31,共4页
Shandong Chemical Industry
基金
甘肃省教育厅:高校教师创新基金项目(2023A-207)。
关键词
生物炭
吸附
铅离子
biochar
adsorption
lead ion
作者简介
寇鹏斌,讲师,硕士,研究方向:工业废水处理。
