Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Feb;29(6):8281-8293.
doi: 10.1007/s11356-021-16156-8. Epub 2021 Sep 5.

Enhanced degradation of bisphenol S by persulfate activated with sulfide-modified nanoscale zero-valent iron

Jing Cai  1 , Yan Zhang  2
Affiliations

Enhanced degradation of bisphenol S by persulfate activated with sulfide-modified nanoscale zero-valent iron

Jing Cai et al. Environ Sci Pollut Res Int. 2022 Feb.

Abstract

Sulfide-modified nanoscale zero-valent iron (S-nZVI) has been considered an efficient material to remove heavy metals and organic contaminants. The experiments of bisphenol S (BPS) degradation by persulfate (PS) activated with S-nZVI (S-nZVI/PS) or nZVI (nZVI/PS) were carried out in this paper. The results show that, compared to the bare nZVI/PS system, the S-nZVI/PS system shows higher activity in BPS degradation, especially at high BPS concentration. The reaction rate constant kobs of BPS removal by the S-nZVI/PS system (0.142 min-1) was much higher than that in nZVI/PS system (0.089 min-1) because more oxidation species were generated in the S-nZVI/PS system. The results of electron paramagnetic resonance (EPR) and radical quenching tests show that both hydroxyl radical (·OH) and sulfate radical (SO4·-) were involved in the degradation of BPS and had a great contribution to BPS removal. Moreover, the effects of S/Fe molar ratio, S-nZVI dosage, initial pH, and initial concentration of PS or BPS on S-nZVI/PS were also studied. The results show that the S/Fe molar ratio has significant influence on the BPS degradation; over 97.7% of the removal efficiency was achieved at 0.035 of S/Fe molar ratio. And the removal efficiency of BPS degradation increased with the increase of the dosage of S-nZVI, PS concentration. Furthermore, BPS could be efficiently removed in solutions with a wide range of initial pH (3.13-9.35). The observed results show that it is promising in the removal of micro-pollutants from water by persulfate activated with S-nZVI.

Keywords: Bisphenol S degradation; Hydroxyl radical (·OH); Persulfate; Sulfate radical (SO4 ·-); Sulfide-modified nanoscale zero-valent iron (S-nZVI).

PubMed Disclaimer

References

    1. Ahsan N, Ullah H, Ullah W, Jahan S (2018) Comparative effects of bisphenol S and bisphenol A on the development of female reproductive system in rats; a neonatal exposure study. Chemosphere 197:336–343 - DOI
    1. Azevedo LF, Hornos Carneiro MF, Dechandt CRP, Cassoli JS, Alberici LC, Barbosa F Jr (2020) Global liver proteomic analysis of Wistar rats chronically exposed to low-levels of bisphenol A and S. Environmental Research 182:109080 - DOI
    1. Cai J, Zhang Y (2020) Enhanced reduction of bromate from water by AC/S-nZVI: performance and mechanism. Journal of Environmental Engineering 146(9):04020107 - DOI
    1. Cao Z, Liu X, Xu J, Zhang J, Yang Y, Zhou J, Xu X, Lowry GV (2017) Removal of antibiotic florfenicol by sulfide-modified nanoscale zero-valent iron. Environ Sci Technol 51(19):11269–11277 - DOI
    1. Champmartin C, Marquet F, Chedik L, Decret MJ, Aubertin M, Ferrari E, Grandclaude MC, Cosnier F (2020) Human in vitro percutaneous absorption of bisphenol S and bisphenol A: a comparative study. Chemosphere 252:126525 - DOI

LinkOut - more resources