Figure 8 - uploaded by Nestor Efren Mendez
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... derivate to the reaction between the trapped electrons and the dissolved oxygen in the system with superoxide radical anions (O2 •−) are generated [50,51]. Consequently, this superoxide radicals anion results in hydroxyl radicals (OH•) formation [52][53][54], which are responsible for the oxidation and the degradation of the organic dye compound present in the CR (Figure 8). Processes 2020, 8, x FOR PEER REVIEW 11 of 19 Figure 7. Uv-vis spectra of the (a) Fe3O4 NPs, the Fe3O4 NPs-CR, and the CR (40 mgL −1 ) and (b) Congo red photodegradation by Fe3O4 NPs synthesized using Cnicus benedictus. ...
Context 2
... derivate to the reaction between the trapped electrons and the dissolved oxygen in the system with superoxide radical anions (O2 •−) are generated [50,51]. Consequently, this superoxide radicals anion results in hydroxyl radicals (OH•) formation [52][53][54], which are responsible for the oxidation and the degradation of the organic dye compound present in the CR (Figure 8). On the other hand, the adsorption rate and the equilibrium concentration at which CR is degraded can be described in detail by theoretical adsorption models. ...
