@article {48267,
	title = {Dual activity cavitation reactors for increased efficacy in degradation of refractory pollutants-A case study on cephalexin degradation},
	journal = {Chemical Engineering Research \& Design},
	volume = {192},
	year = {2023},
	month = {APR},
	pages = {310-322},
	type = {Article},
	abstract = {<p>
	The present work discloses a new form of cavitation processes using reactors of dual activity for increased efficiency. A proof of concept is established for the degradation of a refractory pollutant-cephalexin using both conventional and dual function cavitation reactors for the first time using acoustic and hydrodynamic cavitation (HC). A vortex diode as a cavitating device was employed for HC using aluminium as a non-catalytic and copper as dual function device for providing additional catalytic effect. The process in-tensification using hydrogen peroxide (H2O2) coupled with the dual function devices was highly effective. A negligible degradation with only HC and 81\% for HC coupled with H2O2 in 60 min for Al-vortex diode compared to 100\% degradation in only 5 min for the copper device clearly demonstrates the order of magnitude enhancements establishing dual function due to catalytic activity. Also, pH modification (pH 11) yields enhancement over 300\% for Cu-vortex diode. The use of dual function reactors drastically reduces H2O2 do-sage. The overall enhancements in the per pass degradation and cavitation yields were huge, similar to 3000\% and 1450\% respectively, highlighting the potential of the dual function ca-vitation reactors in real-life applications, not just for increased efficiencies but also for significantly reduced costs.(c) 2023 Institution of Chemical Engineers. Published by Elsevier Ltd. All rights reserved.</p>
},
	keywords = {Advanced oxidation, Degradation, pollution, Technology, Wastewater treatment},
	issn = {0263-8762},
	doi = {10.1016/j.cherd.2023.02.037},
	author = {Dixit, Divya and Thanekar, Pooja and Bhandari, Vinay M.}
}
@article {48727,
	title = {Improving hydrodynamic cavitation using newer surface-coated cavitation reactors},
	journal = {Chemical Engineering Research \& Design},
	volume = {199},
	year = {2023},
	month = {NOV},
	pages = {238-251},
	type = {Article},
	abstract = {<p>
	Surface-coated cavitation devices, vortex diode (SCVD) have been reported for the first time for enhancing efficiency of hydrodynamic cavitation (HC). Two surface-coated cavitation reactors using coating of copper and nickel (-50 mu m) were evaluated, also comparing results with conventional reactor vortex diode. The proof of concept is successfully demonstrated for complete degradation of two model organic pollutants, antibioticscephalexin (CFX) and ciprofloxacin (CIP). The surface-coated reactors provide dual activity, and the catalytic effect is highly pronounced with process intensification using H2O2 and/ or pH alternations. Integration of SCVD, pH and H2O2 was the most effective strategy. Complete degradation of the antibiotics was achieved within minutes with H2O2 (-1000 molar ratio) for both Cu and Ni-surface-coated cavitation reactors compared to lower degradation of-19\% for CFX and-37\% for CIP using only HC. An excellent enhancement of over 300\% for CFX degradation at pH 11 and-170\% for CIP degradation at pH 4 was obtained. Huge enhancements in per-pass degradation and cavitational yields (up to 400 times) clearly highlight the utility of the surface-coated cavitation reactors in various applications and for cost-effectiveness.(c) 2023 Institution of Chemical Engineers. Published by Elsevier Ltd. All rights reserved.</p>
},
	keywords = {Hydrodynamic cavitation, Oxidation, pollution, Reactor, Technology, Wastewater treatment},
	issn = {0263-8762},
	doi = {10.1016/j.cherd.2023.10.002},
	author = {Dixit, Divya and Thanekar, Pooja and Bhandari, Vinay M.}
}
