摘要
采用氯化锌浸渍法制备柚子皮活性炭,研究了该活性炭对染料废水中刚果红的吸附性能。结果表明:在p H=11时,吸附效果最好;投加量越大,单位质量活性炭对刚果红的吸附量越小;吸附量随溶液初始浓度的升高而增加;刚果红的吸附在90 min内基本可以达到平衡,柚子皮活性炭对刚果红的吸附是物理性质的、自发的;等温吸附可采用Langmuir等温模型拟合且相关性显著;动力学吸附过程很好地遵循准二级动力学模型,刚果红在柚子皮活性炭孔隙中的扩散不是唯一的速率控制步骤,可能有多个步骤共同控制该吸附过程。
Activated carbon adsorbent was prepared from pomelo peel by activation with zinc chloride.The ab-sorbing effect of activated carbon on Congo red is studied.The results suggested that when pH=1 1 ,the adsorp-tion was the best.The higher the dosage,the less the adsorbing capacity on Congo red was.Adsorption could be increased by enhancing the initial Congo red concentration.It was found that the adsorption of Congo red was of physical nature,spontaneous and the adsorption got to the balance basically after 60 min.When isothermal adsorption of Congo red used the Freundlich isothermal model fitting,the adsorption kinetics process of Congo red satisfactorily follows the second order kinetic model.However,the pore diffusion of Congo red in pomelo peel activated carbon adsorption was not the only rate controlling step,the adsorption process may be controlled by multiple steps together.
出处
《桂林理工大学学报》
CAS
北大核心
2015年第1期147-151,共5页
Journal of Guilin University of Technology
基金
广西矿冶与环境科学实验中心项目(KH2012ZD004)
广西危险废物处置产业化人才小高地项目
关键词
柚子皮活性炭
刚果红
吸附性能
pomelo peel activated carbon
Congo red
adsorption property
