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Bismuth-Doped Nano Zerovalent Iron: A Novel Catalyst for Chloramphenicol Degradation and Hydrogen Production

Overview
Journal ACS Omega
Specialty Chemistry
Date 2020 Dec 7
PMID 33283110
Citations 6
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Abstract

In this study, we showed that doping bismuth (Bi) at the surface of Fe (Bi/Fe, bimetallic iron system)-synthesized by a simple borohydride reduction method-can considerably accelerate the reductive degradation of chloramphenicol (CHP). At a reaction time of 12 min, 62, 68, 74, 95, and 82% degradation of CHP was achieved with Fe, Bi/Fe-1 [1% (w/w) of Bi], Bi/Fe-3 [3% (w/w) of Bi], Bi/Fe-5 [5% (w/w) of Bi], and Bi/Fe-8 [8% (w/w) of Bi], respectively. Further improvements in the degradation efficiency of CHP were observed by combining the peroxymonosulfate (HSO ) with Bi/Fe-5 (i.e., 81% by Bi/Fe-5 and 98% by the Bi/Fe-5/HSO system at 8 min of treatment). Interestingly, both Fe and Bi/Fe-5 showed effective H production under dark conditions that reached 544 and 712 μM by Fe and Bi/Fe-5, respectively, in 70 mL of aqueous solution containing 0.07 g (i.e., at 1 g L concentration) of the catalyst at ambient temperature.

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