Eco-friendly bleaching of indigo dyed garment by advanced oxidation processes

Degumming methods for bast fibers—A mini review

“…The implosion causes small localised high temperatures and pressures at the point of bubble collapse (Fig. 12) (Ben Hamida et al, 2017). The thickness of the liquid/surface boundary layer of a sample treated with ultrasonic agitation can be reduced to 1-8 % of untreated sample allowing treatment chemistry to access the surface (Hurren et al, 2008).…”

Grand Challenges in Chemical Treatment of Hazardous Pollutants

“…Chemical treatment like chlorination is effective but it is associated with generation of disinfection by-products (DBPs) (Song et al, 2021). Another chemical treatment like ozonation is effective against numerous recalcitrant pollutants but this process is highly energy intensive (Ben Hamida et al, 2017;Ben Hamida et al, 2018). Low mineralization efficiency, selectivity towards pollutants and low solubility in water make this approach more expensive (Wang and Chen, 2020).…”

Combining ozone and ultrasound technology to remove S2− in Bayer liquor

“…Referring to the method of wet oxidation desulfurization, O 3 is chosen instead of oxygen to make up for the low oxidation capacity and low potential of oxygen. O 3 is directly oxidized as an oxidant in the alkaline system of Bayer liquor, and it can also generate active groups including •OH for indirectly oxidation [17] , [18] , [19] . However, it is reported that the single O 3 system has low ozone dissolution and slow mass transfer, which causes high-energy consumption [20] , [21] .…”