Persulfate activation with rice husk-based magnetic biochar for degrading PAEs in marine sediments

Persulfate activation with rice husk-based magnetic biochar for degrading PAEs in marine sediments Phthalate esters (PAEs) can interfere with the endocrine systems of humans and wildlife. The main objective of this study was to evaluate the suitability of a composite for remediating marine sediments contaminated with PAEs. The composite was synthesized with magnetite nanoparticles (Fe O ) and rice husk biochar (RHB) by using chemical co-precipitation. Fe O ,RHB,andFe O – 3 4 3 4 3 4 −� RHB substantially activated sodium persulfate (Na S O , PS) oxidation to form SO and thus degrade PAEs in marine sedi- 2 2 8 4 ments in a slurry system. The morphology and structural composition of the magnetic composites were examined using XRD, FTIR, environmental scanning electron microscopy–energy-dispersive X-ray spectrometry, and superconducting quantum inter- ference device. The Fe O –RHB composites were confirmed to be prepared successfully. The influences of various parameters, 3 4 including the PS concentration, composite loading, and initial pH, were investigated. The concentration of high-molecular-weight PAEs (HPAEs) in sediment was much higher than that of low-molecular-weight PAEs (LPAEs); di-(2-ethylhexyl) phthalate (DEHP) was an especially salient marker of PAE contamination in sediments. Furthermore, increasing the PS and Fe O –RHB 3 4 doses accelerated PAE oxidation at pH 3.0; 83% degradation http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Environmental Science and Pollution Research Springer Journals

Persulfate activation with rice husk-based magnetic biochar for degrading PAEs in marine sediments

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Environment; Environment, general; Environmental Chemistry; Ecotoxicology; Environmental Health; Atmospheric Protection/Air Quality Control/Air Pollution; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
ISSN
0944-1344
eISSN
1614-7499
D.O.I.
10.1007/s11356-018-2423-2
Publisher site
See Article on Publisher Site

Abstract

Phthalate esters (PAEs) can interfere with the endocrine systems of humans and wildlife. The main objective of this study was to evaluate the suitability of a composite for remediating marine sediments contaminated with PAEs. The composite was synthesized with magnetite nanoparticles (Fe O ) and rice husk biochar (RHB) by using chemical co-precipitation. Fe O ,RHB,andFe O – 3 4 3 4 3 4 −� RHB substantially activated sodium persulfate (Na S O , PS) oxidation to form SO and thus degrade PAEs in marine sedi- 2 2 8 4 ments in a slurry system. The morphology and structural composition of the magnetic composites were examined using XRD, FTIR, environmental scanning electron microscopy–energy-dispersive X-ray spectrometry, and superconducting quantum inter- ference device. The Fe O –RHB composites were confirmed to be prepared successfully. The influences of various parameters, 3 4 including the PS concentration, composite loading, and initial pH, were investigated. The concentration of high-molecular-weight PAEs (HPAEs) in sediment was much higher than that of low-molecular-weight PAEs (LPAEs); di-(2-ethylhexyl) phthalate (DEHP) was an especially salient marker of PAE contamination in sediments. Furthermore, increasing the PS and Fe O –RHB 3 4 doses accelerated PAE oxidation at pH 3.0; 83% degradation

Journal

Environmental Science and Pollution ResearchSpringer Journals

Published: Jun 4, 2018

References

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