02132nas a2200241   4500008004100000022001400041245008500055210006900140260000800209300001200217490000800229520136500237653002801602653001401630653001401644653001201658653001501670653002501685100001701710700002001727700002401747856011901771       2023                        eng d  a0263-876200aImproving hydrodynamic cavitation using newer surface-coated cavitation reactors0 aImproving hydrodynamic cavitation using newer surfacecoated cavi  cNOV  a238-2510 v1993 a<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>
10aHydrodynamic cavitation10aOxidation10apollution10aReactor10aTechnology10aWastewater treatment1 aDixit, Divya1 aThanekar, Pooja1 aBhandari, Vinay, M.  uhttp://library.ncl.res.in/content/improving-hydrodynamic-cavitation-using-newer-surface-coated-cavitation-reactors