Ultrasonic-enhanced Fenton-like degradation of bisphenol A using a bio-synthesized schwertmannite catalyst

Ultrasound for the remediation of contaminated waters with persistent organic pollutants: A short review

“…For some molecules the rate of degradation increases with decreasing pH [42] , [43] , [47] , [59] , [63] , [65] . This may be related to the enhanced generation of free radicals under acidic conditions or the higher oxidation potential of hydroxyl radical (HO•) in acidic conditions.…”

“…Li et al used bio-synthesized schwertmannite (Sch) to promote the degradation of Bisphenol-A (BPA) ( Fig. 5 e) using iron-oxy-hydroxy-sulfate as a Fenton-type catalyst, combined with the ultrasound [65] . The authors reported a synergistic effect between the ultrasound and Sch in the activation of H 2 O 2 .…”

“…The authors verified that hydroxyl radicals arise from both homogeneous and heterogeneous pathways. They argue that the proportional effect of the ultrasound on Fenton-type BPA degradation is due to the following reasons: (1) the ultrasound increases the generation of radicals through cavitation; (2) the ultrasound decreases the activation energy of the degradation reaction; (3) the ultrasound accelerates the dissolution of iron; (4) the US continuously removes impurities from the catalyst surface [65] .…”

Assessment of Sulfate Radical-Based Advanced Oxidation Processes for Water and Wastewater Treatment: A Review

“…The application of ultrasound for the activation of PS and PMS is less widespread than in the case of UV radiation, although there is a greater record of its use for the generation of hydroxyl radicals from hydrogen peroxide [52][53][54]. It is considered a clean, safe and energy saving technology, but on its own it does not have a great effect and is expensive, which makes it unviable [55].…”

Sol–gel preparation of spherical γ‐Al 2 O 3 with macro‐mesopores as an efficient adsorbent for acid fuchsin

“…At present, the main methods to remove pollutants in wastewater include adsorption method [5, 6], biological decolourisation method [7, 8], photocatalytic degradation method [9], ultrasonic degradation method [10], advanced microwave enhanced oxidative program degradation method [4] and so on. Among these methods, the biological degradation method needs to protect the activity of the strain and requires higher culture environment [7], the ultrasonic degradation method needs to make use of the synergistic effect of hydrogen peroxide, which has strong oxidation and needs to be sealed [10]. While the adsorption method is simple, and different adsorbents have different adsorption effects.…”