摘要
为了从复杂的实际废水中选择性地分离重金属离子,以生物质甘蔗渣为基质,通过环氧氯丙烷将聚乙烯亚胺键合到甘蔗渣表面,以铜(Ⅱ)为模板离子,戊二醛为交联剂,利用表面印迹技术,制备了铜(Ⅱ)离子印迹聚合物。采用傅里叶变换红外光谱法和Zeta电位法对其进行了表征,并通过静态吸附实验研究了其等温吸附和动力学吸附行为,探讨了pH和共存离子对其吸附性能的影响。结果表明:在25℃,pH 4时,印迹聚合物对铜(Ⅱ)的吸附在40 min内达到吸附平衡,最大吸附量为36.10 mg·g^(-1),且该过程符合Langmuir等温吸附模型和准二级动力学模型,选择性吸附实验结果表明,表面铜离子印迹聚合物对铜(Ⅱ)具有很好的选择性。这为从复杂的实际废水体系中选择性地分离重金属离子铜(Ⅱ)提供理论参考。
A novel copper(Ⅱ)ion-imprinted polymer was prepared by a surface imprinted technique using biomass sugarcane bagasse grafted with polyethyleneimine as a substrate,copper(Ⅱ)as template and glutaraldehyde as cross-linking agent.The ion-imprinted polyethyleneimine bagasse was characterized by Fourier transform infrared spectroscopy and Zeta potential,and the adsorption isotherm and kinetics were investigated,effects of pH and co-ions on Cu(Ⅱ)adsorption on the imprinted bagasse were also disscussed.The results showed that the imprinted polymer possesses excellent adsorption selectivity toward Cu(Ⅱ)with a maximum adsorption amount of 36.10 mg∙g^(-1),at pH 4.0 and room temperature.And the adsorption isotherm could be better fitted with the Langmuir model.Further,the Cu(Ⅱ)adsorption is a fast reaction process,which could be completed within 40 min,and the adsorption kinetics follows the pseudo-second-order model.The results provides a theoreticalreference for the separation of Cu(Ⅱ)from complex wastewater systems.
作者
刘洋
李红霞
欧阳泽
余军霞
池汝安
LIU Yang;LI Hongxia;OUYANG Ze;YU Junxia;CHI Ru’an(School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Key Laboratory of Green Chemical Processes(Wuhan Institute of Technology),Ministry of Education,Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry,Wuhan 430205,China)
出处
《武汉工程大学学报》
CAS
2023年第2期186-191,共6页
Journal of Wuhan Institute of Technology
基金
国家自然科学基金(21978226)
武汉市应用基础前沿项目(2020020601012276)。
关键词
表面印迹技术
吸附
铜(Ⅱ)
甘蔗渣
surface imprinted technique
adsorption
copper(II)
bagasse