摘要
选择天然花生壳作为生物吸附剂,研究了其对水溶液中亚甲基蓝(MB)、中性红(NR)和孔雀石绿(MG)的吸附行为.考察了pH值、盐浓度、振荡时间、初始浓度等因素对染料吸附的影响.结果表明,随着溶液pH值的增大、初始浓度增大以及盐浓度的降低,花生壳对3种染料的吸附率增大.亚甲基蓝、中性红和孔雀石绿吸附过程符合Langmiur和Freundlich吸附等温式.花生壳对3种染料的吸附过程可以用准二级动力学模型较好地描述.相同条件下对3种染料的吸附强弱为NR>MG>MB.
The potential feasibility of a low cost biomaterial as sorbent for removal of cationic dyes of methylene blue（MB）,neutral red（NR） and malachite green（MG） from aqueous solution was investigated.Experiments were carried out as function of pH,salt concentration,contact time and initial dye concentration.A greater percentage of the three dyes removal was observed with decrease in salt concentration and increase of pH.Higher initial concentration is more favorable for the adsorption of dyes.The equilibrium data agreed well with the Langmuir and Freundlich models.The pseudo-first order model and pseudo-second order model were used to describe the kinetics data.The dynamic data were in good agreement with the pseudo-second order model.The removal of methylene blue,neutral red and malachite green by peanut hull followed the descending order： NRMGMB.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2010年第6期87-90,共4页
Journal of Zhengzhou University（Engineering Science）
基金
河南省科技攻关资助项目(102102210103)
河南省教育厅科技攻关资助项目(2010A610003)
关键词
生物吸附
花生壳
亚甲基蓝
中性红
孔雀石绿
biosoption
peanut hull
methylene blue（MB）
neutral red（NR）
malachite green（MG）
