改进碳纳米管/聚氨酯复合材料吸附硝基苯  

Adsorption of nitrobenzene by improving carbon nanotubes and polyurethane composite

作　　者：谢刚[1,2,3] 毛宁 周林成[2] 潘多[2] 李彦锋[1,2] 

机构地区：[1]兰州大学资源环境学院,兰州730000 [2]兰州大学化学化工学院生物化工及环境技术研究所,兰州730000 [3]兰州理工大学石油化工学院,兰州730050 [4]甘肃烟草公司技术研究与发展中心,兰州730000

出　　处：《环境工程学报》2015年第3期1117-1123,共7页Chinese Journal of Environmental Engineering

基　　金：国家基础科学人才培养基金资助(J1103307)

摘　　要：以酸化碳纳米管(CNTs)强化聚氨酯泡沫(PUF),通过原位聚合法制备碳纳米管/聚氨酯复合材料(CPUF)。借助红外光谱(FT-IR)、扫描电镜(SEM)、热失重分析(TGA)和力学性能测试等方法研究和表征了CPUF复合材料的性能和结构。研究了用CPUF复合材料对人工模拟废水中硝基苯(NB)的吸附性能、影响因素及其再生后吸附效果。结果表明,CPUF复合材料对硝基苯具有较强的吸附能力,在p H=5.4、投加量为2 g/L、接触时间24 h的条件下,升高温度会降低CPUF复合材料的饱和吸附量,但会提高初始吸附速率,等温吸附过程符合Langmuir方程,属于单分子吸附。饱和后的复合材料可采用简单热再生,再生后对NB的吸附能力没有明显下降。Acidified carbon nanotubes( CNTs)-reinforced polyurethane foam( PUF) based composite( CPUF) were fabricated by the in situ polymerization method. The structure and properties of the CPUF composite were investigated by fourier transform infrared spectroscopy( FT-IR),scanning electron microscope( SEM),thermogravimetric analysis( TGA) and tensile testing. The performance of adsorption,influencing factors and adsorptive effect after regeneration for removing nitrobenzene( NB) from simulated wastewater by CPUF composite were investigated. The results showed that the adsorption of NB by CPUF composite was better and under these conditions: p H of 5. 4,CPUF composite amount of 2 g / L,contact time of 24 h,the amount of saturated adsorption of CPUF composite was reduced by temperature rising,but higher initial adsorption rate,the adsorption isotherms conformed to Langmuir adsorption isotherm in line with the Langmuir equation,belonged to the single molecular adsorption. Saturated CPUF composite could be regenerated with simple thermal method and the removal efficiency of NB by the regenerated sorbent did not drop obviously.

关 键 词：碳纳米管 聚氨酯泡沫 硝基苯 吸附 

分 类 号：X703[环境科学与工程—环境工程]