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CuS enabled efficient Fenton-like oxidation of phenylarsonic acid and inorganic arsenic immobilization.

CuS enabled efficient Fenton-like oxidation of phenylarsonic acid and inorganic arsenic immobilization.

Authors :
Liu W
Zhou F
Yang H
Shi Y
Qin Y
Sun H
Zhang L
Source :
Journal of hazardous materials [J Hazard Mater] 2024 Dec 05; Vol. 480, pp. 136171. Date of Electronic Publication: 2024 Oct 16.
Publication Year :
2024

Abstract

Herein, copper sulfide (CuS) was introduced to the Fenton-like (Fe(III)/H <subscript>2</subscript> O <subscript>2</subscript> ) system for the efficient removal of phenylarsonic acid (PAA). Results of reactive oxygen and Fe/Cu species showed that CuS preferentially reacted with Fe(III) and H <subscript>2</subscript> O <subscript>2</subscript> to generate Cu(I) and superoxide anion (•O <subscript>2</subscript> <superscript>-</superscript> ). These reductive species could efficiently promote the Fe(III)/Fe(II) and Cu(II)/Cu(I) cycles, and are beneficial to the sequential Fenton reaction to generate •OH. The organoic/inorganic arsenic species detected in the CuS/Fe(III)/H <subscript>2</subscript> O <subscript>2</subscript> system confirmed that PAA was oxidized by •OH to hydroxylated organoarsenic and phenolic intermediates, which were further mineralized to oxalate and formic acid. Meanwhile, the inorganic As(III)/As(V) released during PAA degradation were efficiently immobilized by CuS. The PAA removal efficiency remained as high as 92.9 % after 5 cycles of the CuS-mediated Fenton-like process. These results demonstrate an innovative method for the treatment of organoarsenic-contaminated water, and provide new insights into the enhanced Fenton-like process utilizing sulfide minerals.<br />Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2024 Elsevier B.V. All rights reserved.)

Details

Language :
English
ISSN :
1873-3336
Volume :
480
Database :
MEDLINE
Journal :
Journal of hazardous materials
Publication Type :
Academic Journal
Accession number :
39413521
Full Text :
https://doi.org/10.1016/j.jhazmat.2024.136171