RESUMEN
The objective of this work was to develop a novel wet-scrubbing process using Fe(VI) for the simultaneous removal of gaseous NO and SO(2). The oxidation of SO(2) and NO with Fe(VI) was studied in aqueous solution at alkaline pH (9.0-11.0). A stoichiometric molar ratio for NO and SO(2) oxidation with Fe(VI) was determined to be nearly 3.0. Sulfate and nitrate was identified as final products by ion chromatography from the reaction at pH 9.0-11.0. The feasibility of simultaneous removal of multiple gas pollutants with the continuous feeding of ferrate in lab-scale was investigated from the view of industrial application. It was found that the removal efficiency of NO and SO(2) was enhanced with the increase of Fe(VI) concentration, more than 90% NO removal efficiency and 100% SO(2) removal efficiency were achieved by wet-scrubbing process using Fe(VI) at room temperature and ambient atmosphere. The results demonstrate that Fe(VI) could be an effective wet-scrubbing agent for the simultaneous removal of NO and SO(2).
Asunto(s)
Hierro/química , Óxido Nítrico/aislamiento & purificación , Dióxido de Azufre/aislamiento & purificación , Cromatografía Liquida , Estudios de Factibilidad , Óxido Nítrico/química , Oxidación-Reducción , Dióxido de Azufre/químicaRESUMEN
A novel layered AgBr-based nanocomposite (designated as AgBr-NC) was prepared using nanosecond pulsed laser ablation in liquids (PLAL) in the presence of cetyltrimethylammonium bromide (CTAB). The obtained layered AgBr-NC possesses well-defined 2D shape. X-ray diffraction (XRD) pattern was composed of a series of peaks that could be indexed to (001) reflections of a layered structure, and the basal spacing of 20.0 angstroms indicated that the surfactant was included between the AgBr interlayers in an interdigitated bilayer arrangement. In this work, we provide an experimental proof for the synthesis of a novel layered two-dimensional (2D) AgBr-NC nanosheet using PLAL in the presence of CTAB. The formation mechanism of 2D nanocomposites is also discussed.