摘要
以高岭土为吸附剂,研究了其对亚甲基蓝模拟废水的吸附行为、等温吸附模型和吸附动力学。探讨了吸附时间、高岭土投加量、亚甲基蓝初始浓度、盐浓度、p H值等因素对亚甲基蓝吸附效果的影响。结果表明,吸附时间120 min,高岭土投加量10 g/L,低温、碱性条件下就能达到更好的亚甲基蓝吸附效果。高岭土对亚甲基蓝吸附符合Langmuir和Freundlich等温吸附模型,吸附动力学符合准二级动力学模型。
The adsorption behavior,isotherm model and dynamics of methylene blue simulated wastewater with Kaolin as adsorbent has been investigated. The effects of adsorption time,Kaolin dosage,methylene blue initial concentration,salts concentration,p H value on methylene blue adsorption have been studied,respectively. The results show that the better methylene blue adsorption effect can be obtained in the adsorption time of 120 min,Kaolin dosage of 10 g / L,lower temperature and alkaline solution. The adsorption of methylene blue on Kaolin fits with Langmuir and Freundlich isothermal adsorption models and the dynamic model fits with pseudo-second-order dynamic model.
出处
《应用化工》
CAS
CSCD
北大核心
2016年第3期496-500,共5页
Applied Chemical Industry
关键词
亚甲基蓝
高岭土
吸附
等温吸附模型
methylene blue
Kaolin
adsorption
isotherm adsorption model
