Optimization of treating phenol from wastewater through the TiO2-catalyzed advanced oxidation process and response surface methodology

Efficient treatment of salty organic wastewater by α‐MnO2‐N/C synergistic catalytic ozonation: Effect and mechanism

“…Researchers have conducted extensive research on catalysts development, 7 such as α-FeOOH, 8 MnO x /GAC, 9 CuFe 2 O 4 /TNTs, 10 and other catalysts reported by Ma et al, Ce-MCM-48, 11 Fe 2 O 3 / Al 2 O 3 @SBA-15, 12 β-FeOOH/Al 2 O 3 , 13 and other catalysts designed by Qu et al, LaCoO 3 /g-C 3 N 4 14 and Co-FeOOH 15 catalysts prepared by Chen et al, rGO 16,17 [20][21][22][23][24] Among them, the AC-based metal oxide catalyst has good ozone catalytic performance due to its large specific surface area and other characteristics. For example, Zhou et al prepared MgO/AC catalyst for catalytic ozone treatment of phenol wastewater.…”

“…Researchers have conducted extensive research on catalysts development, 7 such as α‐FeOOH, 8 MnO x /GAC, 9 CuFe 2 O 4 /TNTs, 10 and other catalysts reported by Ma et al, Ce‐MCM‐48, 11 Fe 2 O 3 /Al 2 O 3 @SBA‐15, 12 β‐FeOOH/Al 2 O 3 , 13 and other catalysts designed by Qu et al, LaCoO 3 /g‐C 3 N 4 14 and Co‐FeOOH 15 catalysts prepared by Chen et al, rGO 16,17 and other metal‐free catalysts jointly developed by Cao and Wang et al, TiO 2 /Al 2 O 3 18 and Co/Al 2 O 3 19 catalysts synthesized by Fernando et al Metal oxide catalysts are widely used due to the advantages of better performance, low cost, and simple synthesis 20–24 . Among them, the AC‐based metal oxide catalyst has good ozone catalytic performance due to its large specific surface area and other characteristics.…”

“…Currently, metal oxide catalysts show good ozone catalytic oxidation performance, but there are some problems that need to be solved such as easy agglomeration and loss of metal active components 23,24,27 . The preparation of metal oxide catalysts is usually subject to high‐temperature calcination that the metal active components will have different degrees of agglomeration during calcination process due to the Ostwald ripening mechanism, 27 which will result in a weaker binding between the active ingredient and the carrier.…”

“…Currently, metal oxide catalysts show good ozone catalytic oxidation performance, but there are some problems that need to be solved such as easy agglomeration and loss of metal active components. 23,24,27 The preparation of metal oxide catalysts is usually subject to hightemperature calcination that the metal active components will have different degrees of agglomeration during calcination process due to the Ostwald ripening mechanism, 27 which will result in a weaker binding between the active ingredient and the carrier. And in the heterogeneous ozone catalytic oxidation process, the agglomerated metal active components would be detached from the surface of carrier due to collision, weak binding, and so forth which will cause secondary pollution and increase the difficulty of subsequent treatment.…”

TERI Advanced Oxidation Technology (TADOX®) to treat industrial wastewater with integration at pre- and post-biological stage: case studies from India

“…This biodegradability is indicated by BOD/COD ratio (Zhang et al 2020;Saravanathamizhan & Perarasu 2021;Tooker et al 2021); thus it is expected that AOP implementation at the pre-biological stage could break down complex organics and enhance biodegradability ( Jamil et al 2011;Oller et al 2011;Vilar et al 2012). Several AOP-based treatments have been reported at t pre-biological stage for streams such as chemical wastewater (Ribeiro et al 2015;Ramteke & Gogate 2016;Oliveira Guimarães et al 2019), phenolic wastewater (Ahmed et al 2011;de Sá et al 2018;Jay et al 2019;Oliveira Guimarães et al 2019) and oil drilling effluent (Yu et al 2017;Jiménez et al 2019). Hence for such effluent streams, TADOX ® is planned to be integrated at a pre-biological stage, as shown in Figure 1.…”