A rapid removal of xylene vapor from environmental air based on bismuth oxide coupled to heterogeneous graphene/ graphene oxide by UV photo-catalectic degradation-adsorption procedure. Issue 5 (October 2020)

• Record Type: Journal Article
• Authors: Faghihi-Zarandi, Ali; Rakhtshah, Jamshid; Bahrami Yarahmadi, Baharak; Shirkhanloo, Hamid
• Is Part Of: Journal of environmental chemical engineering. Volume 8:Issue 5(2020)
• Publication Date: 2020-10
• Subjects: Xylene vapor -- Bismuth oxide nanoparticles -- Heterogeneous graphene/graphene oxide -- UV radiation -- Photocatalectic degradation -- Adsorption; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2020.104193
• Languages: English
• ISSNs: 2213-2929

Abstract

Graphical abstract: Highlights: UV photo-catalectic degradation coupled to adsorption (UV-PCDA) was used for efficient removal of xylene from air. Xylene was semi degradated to main fragments by bismuth oxide nanoparticles and UV irradiation. The fragments of xylene adsorbed on the surface of graphene/graphene oxide (NG/NGO). Abstract: A simple and fast method based on bismuth oxide nanoparticles coupled to heterogeneous graphene/ graphene oxide (BONPs-NG/NGO) was used for the rapid removal of xylene vapor from environmental air by UV photo-catalectic degradation-adsorption procedure (UV-PCDA). By dynamic system, the xylene vapor in pure air was generated in the chamber and flowed to BONPs-NG/NGO sorbent inside in quartz glass tube with UV lamp radiation (QGT-UV) at optimized conditions. In the present of BONPs and UV irradiation, xylene and intermediates ( o-xylene, p-xylene, m-xylene ) were semi degradated to main fragments by radicals and adsorbed on the surface of NG/NGO (200 mg). After degradation, the main fragments of xylene determined with gas chromatography (GC–MS). Based on the results, the removal efficiency of xylene based on BONPs and BONPs-NG/NGO were obtained 38.8 % and 98.7 %, respectively. By static system in presence of UV irradiation, the capacity adsorption of xylene with 200 mg of BONPs-NG/NGO and NG/NGO was obtained 223 mg g −1 and 134.6 mg g -1 in 85 °C for 10 min, respectively. The validation of methodology was obtained by spiking of different concentrations of standard xylene in pure air.