摘要
以生物质复合燃料焚烧灰为原料制备陶粒并应用于处置含铅废水。结果表明,混烧灰、原污泥与高岭土掺配比例为70%∶20%∶10%时,1050℃烧制的陶粒性能较好。陶粒内部结构主要由气孔和孔间壁组成。陶粒对100mg/L的Pb(Ⅱ)的吸附平衡时间约为13h,吸附去除率超过99.9%。随着吸附质初始浓度的增大,陶粒吸附剂对Pb(Ⅱ)的吸附能力增幅逐渐平缓。吸附剂的量大于5g/L时,Pb(Ⅱ)的吸附去除率趋于平衡,且当吸附剂粒径小于2.36mm或者溶液pH值大于6时,陶粒吸附剂对100mg/L的Pb(Ⅱ)的吸附去除率普遍可以达到99%。等温吸附研究表明陶粒对Pb(Ⅱ)的吸附更符合Langmuir模型;准一级模型适合用于描述其吸附动力学行为。升高温度有利于增加陶粒对pb(Ⅱ)的吸附能力,并且有利于吸附过程的自发进行。
This work focused on adsorption removal of pb(Ⅱ)in aqueous solution on ceramsite prepared by biomass composite fuel co-combustion ash.The results show that ceramsite with 90%of combustion ash and 10%of kaolinite.SEM photo showed the main structure of ceramsite was air pore and wall between pores.The adsorption removal rate was99.9%at the equilibrium time of 13 hours.With an increase of initial concentration of pb(Ⅱ),the increase of adsorption capacity slightly changed.When the particle size was less than 2.36 mm or the pH value was higher than 6,the removal rate was higher than 99%.It was concluded that Langmuir model and pseudo first order model described the isotherm and kinetics during the process of adsorption.Thermodynamic study showed that the adsorption capacity increased and spontaneous adsorption process occurred with an increase of adsorption temperature.
作者
王力
薛永杰
WANG Li;XUE Yong-jie(School of Art,Hubei University of Education,Wuhan 430001,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)
出处
《武汉理工大学学报》
CAS
北大核心
2019年第4期79-84,共6页
Journal of Wuhan University of Technology
关键词
生物质复合燃料
焚烧灰
陶粒
吸附热力学
动力学
biomass composite fuel
combustion ash
ceramsite
adsorption thermodynamics
kinetics
作者简介
王力(1982-),男,讲师.E-mail:wangli37042@126.com
