吸附法处理含吡啶废水的试验研究
Experimental study on treatment of pyridine-containing wastewater by adsorption
田晓春 1于慧强 1刘岩 2孙傲 1丁康乐1
作者信息
- 1. 长江大学化学与环境工程学院,湖北 荆州 434023
- 2. 长江大学资源与环境学院,湖北 武汉 430100
- 折叠
摘要
利用水热碳化技术制备了一种莲房基水热炭.通过产物表征、正交实验、吸附等温线、吸附动力学、再生实验等探讨了水热炭在含吡啶废水处理中的应用.结果表明,莲房水热炭具有不同尺寸的孔隙结构,其表面分布着较为丰富的含氧官能团;水热炭吸附吡啶过程中各因素影响顺序为:吡啶初始浓度>水热炭投加量>溶液pH>吸附时间;莲房水热炭对吡啶的吸附动力学符合准二级模型,在35℃与45℃时Freundlich模型可较好地描述吸附等温线规律;25℃时莲房水热炭对吡啶的最大吸附量为 31.28 mg/g;磷酸溶液对莲房水热炭的再生效果优于NaOH溶液;莲房水热炭经 6 次再生后,对吡啶仍具较好的吸附能力.
Abstract
A lotus seedpod hydrochar is prepared through using hydrothermal carbonization.The potential application of hydrochar in the treatment of pyridine-containing wastewater is explored through a series of laboratory studies,including product characterization,orthogonal experiments,adsorption isotherms,adsorption kinetics and regeneration experiment.The results indicate that the lotus seedpod hydrochar has different sizes of pore structures,and distributes abundant oxygen-containing functional groups on its surface.The order of influence of the factors during the adsorption of pyridine by hydrochar is as follows:the initial concentration of pyridine>the amount of hydrochar>pH>contact time.The adsorption of pyridine on the hydrochar accords with the quasi-secondary model,and the adsorption isotherm pattern at 35℃and 45℃ can be better described by the Freundlich model.The maximum adsorption of pyridine on the prepared hydrochar is 31.28 mg·g-1 at 25℃.Regeneration of the saturated lotus seedpod hydrochar by phosphoric acid solution is better than that by NaOH solution.After six cycles of regeneration,the prepared hydrochar still has a strong adsorption capacity for pyridine.
关键词
水热炭/吸附/吡啶/动力学/再生Key words
hydrochar/adsorption/pyridine/kinetics/regeneration引用本文复制引用
基金项目
国家自然科学基金面上项目(42272175)
国家自然科学基金面上项目(41472095)
油气资源与勘探技术教育部重点实验室开放基金(K2018-05)
出版年
2024
NETL
NSTL
万方数据