A novel method based on functionalized bimodal mesoporous silica nanoparticles for efficient removal of lead aerosols pollution from air by solid-liquid gas-phase extraction

Abstract

In this study, the enrichment and novel sorbent based on functionalized bimodal mesoporous silica nanoparticles (HS-UVM 7 and NH 2 -UVM 7 ) was used for removal of lead aerosols pollution from air by solid liquid gas phase extraction method (SLGPE). In bench scale set up, the lead aerosols [(Pb (NO 3 ) 2 , PbO] was generated by dispersive aerosols generator system (DAGS) and removed from air by reaction loop (RL) / impinger trap (IT) in a liquid phase which was mixed with nano adsorbent in optimized pH. The effect of parameters such as, flow rate, volume of liquid phase, time stirring, temperature, concentration, pH and amount of sorbent (mg) were studied and evaluated by flame atomic absorption spectrometry (FAAS). In optimized conditions, the adsorption capacity of HS-UVM 7 and NH 2 -UVM 7 for Pb(NO 3 ) 2 aerosols was obtained 255.6 mg g −1 and 177.6 mg g −1 , respectively which was more than UVM 7 . The lead oxides aerosols (PbO) were extracted only by HS-UVM 7 at acidic pH with the adsorption capacity of 271.2 mg g −1 . The characterization of SEM, XRD, TEM, and FTIR showed that the HS-UVM 7 has beneficial surfaces for removal of (Pb (NO 3 ) 2 and PbO aerosols from the air by SLGPE method at pH = 5. The method validation was confirmed by standard addition and NIOSH method.

Analysis, construction, characterization, and application of copper nanowires loaded on activated carbon for removal of bromophenol blue in water samples

“…Recently, many techniques based on nanoadsorbentshave been used for the removal of dye and other organic material (BTEX) in water samples [24][25][26][27][28][29][30][31]. To further demonstrate the superiority of our proposed method, a comparison of the important features of the proposed method with those reported in the literature [32][33][34][35] is given in Table 5.…”

Removal of polypropylene nanoplastics from aqueous solution by biochar derived from Date palm fibers: Kinetics and isotherms studies

“…Also, polypropylene nanoplas tics may be exis t with other pollutants (VOCs and heavy metals) which mus t be analyzed based on nanotechnology before determination by GC or AAS methods. Recently, different carbon s tructures such as CNTs, active carbon, functionalized multi-walled carbon nanotubes, aminopropyl trimethoxysilanephenanthrene carbaldehyde immobilized on graphene oxide, bimodal mesoporous silica nanoparticles, hydroxyethyl methylimidazolium tetrafluoroborate immobilized on MWCNTs, task-specific ionic liquids, Nanographene oxide modified phenyl methanethiol nanomagnetic composite, pyrrolic and pyridinic nitrogen doped porous, graphene nanos tructure, and nano-palladium embedded on the mesoporous silica nanoparticles were used for removal VOCs and heavy metalsfrom water and air samples [19][20][21][22][23][24][25][26][27][28]. This research inves tigated the activated carbon obtained from date palm fibers for removing polypropylene pollutants from the water environment.…”

Removal and determination of carbon monoxide based on copper oxide immobilized on Zeolite 13X Nanocatalys t by catalytic oxidation process and gas flow analyzer

“…Therefore, transition metals such as copper [14,15], nickel [16,17] and cobalt [18] and their combinations have been considered for carbon monoxide oxidation due to their high natural abundance and high s tability [13,14,19,20] To date, many s tudies have been performed to inves tigate the catalytic activity of nanocatalys ts. According to previous s tudies, metal nanoparticles used as catalys ts can help improve the reaction efficiency due to their high surface-to-volume ratio, specific surface area, and high chemical and thermal resis tance [21,22]. Hence, attempts have been made to place active nanos tructures on mesoporous supports to increase the s tability of nanocatalys ts and prevent them from c. So far, various porous materials, such as metal oxides, diatomite, zeolites, activated carbon, and alumina, have been s tudied to make copper oxide catalys ts [23][24][25][26][27].…”