吸附
氟化物
热重分析
差示扫描量热法
碳纳米管
化学工程
流出物
化学
核化学
壳聚糖
重量分析
材料科学
无机化学
有机化学
纳米技术
废物管理
工程类
物理
热力学
作者
Lutiane N. Affonso,Jorge Luiz Marques,Valéria V.L. Carvalho,Janaína Oliveira Gonçalves,Sergiane Souza Caldas,Ednei Gilberto Prímel,Thiago A. L. Burgo,Guilherme Luiz Dotto,Luiz Antônio de Almeida Pinto,Tito Roberto Sant’Anna Cadaval
标识
DOI:10.1016/j.jhazmat.2020.122042
摘要
Adsorption of fluoride from fertilizer industry effluent using carbon nanotubes stabilized in chitosan sponge as adsorbent was evaluated. The effluent was produced in the washing of acid gases during the reaction in fertilizer production and all assays were performed using this hazardous material. Adsorbent characterization and ions interactions were elucidated from differential scanning calorimetry, thermal gravimetric analyses, X–ray diffraction, scanning electron microscopy dispersive energy X–ray spectroscopy, atomic force microscopy and X-ray photoelectron spectroscopy. The effluent presented pH 3 and its value not changed in the adsorption assays, maintaining the conditions of the process. The kinetics assays of fluoride from industry effluent were performed in different stirring rates from 100 to 300 rpm. It was observed that adsorption was initially fast reaching the equilibrium at 300 rpm in 20 min. The adsorption capacity was around 975.4 mg g−1, showing the potential of the hybrid material to remove fluoride from a real matrix. The high adsorption capacity was attributed to the chitosan functional groups and the high interaction area promoted by sponge form and the carbon nanotube. Reuse and regeneration of the CNT-CS were investigated and 5 cycles were obtained. The adsorption capacity kept similar values in all cycles.
科研通智能强力驱动
Strongly Powered by AbleSci AI