Heterogeneous catalyst ozonation of Direct Black 22 from aqueous solution in the presence of metal slags originating from industrial solid wastes
Separation and Purification Technology（2020）
Abstract
•Zn-S catalyst improves DB22 decolonization and mineralization rate by heterogeneous catalytic ozonation.•Zn, Ca constituents in Zn-S improve OH* generation in heterogeneous catalytic ozonation of DB22.•DB22′s mineralization by Zn-S catalytic ozonation was highest in alkaline condition.•Mineralization kinetic of DB22 follows pseudo-first order kinetic model.
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Key words
Direct Black 22 (DB22),Zinc slag (Zn-S),Heterogeneous catalyst,Ozonation processes
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