菹草干体对亚甲基蓝的生物吸附  

Biosorption of Methylene Blue in Wastewater by Dried Potamogeton Crispus

作　　者：张希[1] 董晓娇[1] 刘九彰 王爱丽[1] 

机构地区：[1]德州学院化学化工学院,山东德州253023

出　　处：《德州学院学报》2016年第2期38-42,共5页Journal of Dezhou University

基　　金：山东省自然科学基金高校;科研单位联合专项基金(ZR2015BL032);德州学院人才引进课题(2003kjrc06);国家级大学生创新创业训练计划项目(201410448030)

摘　　要：采用静态法研究了菹草干体处理模拟染料废水,考察了吸附时间、溶液初始pH值、吸附剂用量以及亚甲基蓝初始浓度等因素对吸附过程的影响.结果表明,菹草干体对亚甲基蓝吸附去除的最佳反应条件为:菹草干体用量为0.5g/100mL、吸附反应90min、初始浓度为50mg/L、溶液pH为3.在最佳反应条件下,菹草干体对亚甲基蓝的吸附去除率可达95%.菹草对亚甲基蓝的吸附行为符合拟二级动力学方程;菹草对亚甲基蓝的吸附平衡符合Langmuir等温方程,最大吸附量为88.5mg/g.The treatment of simulated dyeing wastewater was studied by static adsorption method using biosorbent material dried Potamogeton crispus.The effects of adsorption equilibrium time,initial pH,the dosage of adsorbent and initial concentration of methylene blue on the adsorption performance were investigated.The results showed that the removal efficiency of methylene blue reached 95% under the optimized conditions of adsorption equilibrium time 90 min,initial pH 3,the dosage of adsorbent 0.5g/100 mL and initial concentration of methylene blue 50mg/L.The methylene blue adsorption onto dried Potamogeton crispus followed the pseudo second-order kinetic model.Thermodynamic studies showed that the adsorption data was well described by Langmuir adsorption isotherm equation.The maximum adsorption capacity of methylene blue was 88.5mg/g.

关 键 词：菹草 生物吸附剂 亚甲基蓝 吸附动力学 吸附等温线 

分 类 号：X788[环境科学与工程—环境工程]