La(OH)3 nanoparticles immobilized on Fe3O4@chitosan composites as novel magnetic nanocatalysts for sonochemical oxidation of benzyl alcohol to benzaldehyde

A sustainable synthesis of novel Fe3O4@CS/La(OH)3 as a nanocatalyst for oxidation of benzyl alcohols to benzaldehydes has been developed.

Removal of Reactive Blue 19 Dye Using a Combined Sonochemical and Modified Pistachio Shell Adsorption Processes from Aqueous Solutions

Background and purpose: Reactive Blue 19(RB19) dye is one of the major dangers to human health and environment. Hence, the removal of these compounds from polluted water has been considered. This study was an attempt to investigate the removal of RB19 dye from aqueous solution in the presence of modified pistachio shell.Materials and Methods: In this experimental study, the treatability of water polluted with RB19dye was investigated by using sonochemical oxidation in a reactor. The sample with the desired concentrations of dye (10-80 mg/L) at pH 2-11 was prepared, then the required concentrations of MPS (0.1– 1.2 g/L) was flowed into the reactor intermittently.Results: The results of the current study showed that 40.26% of the dye was removed in the presence of MPS after 20 min at pH 2, MPS dose 0.7 g/L, and concentration of 20 mg/L.Conclusion: The findings showed that the combined process of ultrasonic and adsorption in the presence of MPS at optimal conditions of operation can be used as an acceptable option in the removal of dye from waters.