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Adsorption and reduction of trichloroethylene by sulfidated nanoscale zerovalent iron (S-nZVI) supported by Mg(OH)2.
- Source :
- Environmental Science & Pollution Research; Feb2023, Vol. 30 Issue 6, p14240-14252, 13p
- Publication Year :
- 2023
-
Abstract
- Sulfidated nanoscale zerovalent iron (S-nZVI) supported on a flower spherical Mg(OH)<subscript>2</subscript> with different Mg/Fe ration were successfully synthesized. The synthesized materials were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Brunauer–Emmett–Teller (BET), and X-ray photoelectron spectroscopy (XPS). The results showed that S-nZVI particles were well dispersed on the petals of the flower spherical Mg(OH)<subscript>2</subscript>. The influence of factors, including the initial solution pH, Mg/Fe, S/Fe were studied. The trichloroethylene (TCE) adsorption data on Mg(OH)<subscript>2</subscript> and S-nZVI @Mg(OH)<subscript>2</subscript> fit well to a Langmuir isotherm model, and the maximum adsorption of S-nZVI @Mg(OH)<subscript>2</subscript> was 253.55 mg/g, which was 2.6-fold of S-nZVI. Meanwhile, the S-nZVI @Mg(OH)<subscript>2</subscript> composite expanded the pH selection range of S-nZVI from 2 to 11. Cycling experiments showed that removal rate was 58.3% for the 5th cycle. TCE removal was due to synergistic action of reduction coupled with adsorption. During this process, 65.43% of total remove TCE from ion chromatography data was reduced and 34.57% of total remove TCE was adsorbed finally. At the same time, adsorption favors reduction. These observations indicated that the S-nZVI @Mg(OH)<subscript>2</subscript> can be considered as potential adsorbents to remove TCE for environment remediation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09441344
- Volume :
- 30
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Environmental Science & Pollution Research
- Publication Type :
- Academic Journal
- Accession number :
- 161767932
- Full Text :
- https://doi.org/10.1007/s11356-022-23195-2