Ascorbic Acid/Fe Composites As an Effective Persulfate Activator for Improving the Degradation of Rhodamine B

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 11

PMID 35541219

Authors

Xiangyu Wang

Yi Du

Huiling Liu

Jun Ma

Affiliations

Soon will be listed here.

Abstract

An ascorbic acid/Fe composite (HA/Fe)-activated persulfate (PS) process was provided for rhodamine B (RhB) removal. Experimental results demonstrated that the HA/Fe-PS system exhibits a rapid and continuous oxidation of organic contaminants, and shows great advantages over the conventional Fe-PS system by significantly improving removal efficiency. This HA induced dramatic enhancement for RhB degradation could be attributed to both the reduction and chelating ability of HA. The HA/Fe composites were characterized using TEM, FE-SEM, FTIR and XPS, indicating that the obtained HA/Fe composites were prepared successfully. Key factors affecting the treatment were determined for the HA/Fe-PS system, including HA/Fe dosage, PS dosage, initial solution pH and temperature. Moreover, radical quenching tests revealed that sulfate radicals (SO˙), hydroxyl radicals (˙OH) and superoxide radicals (O˙) were generated in the HA/Fe-PS system, and SO˙ was the main radical species responsible for RhB degradation. Finally, possible degradation pathways are proposed. These findings prove that the HA/Fe-PS system may provide a simple and effective technology for improving the degradation of refractory organic pollutants.

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