EPR characterization of the catalytic activity of clays for PCE removal by gamma-radiation induced by acid and thermal treatments

Hung Ho Chung; Sang Won Choi; Yong Sik Ok; Jinho Jung

doi:10.1016/j.chemosphere.2004.09.025

EPR characterization of the catalytic activity of clays for PCE removal by gamma-radiation induced by acid and thermal treatments

Hung Ho Chung, Sang Won Choi, Yong Sik Ok, Jinho Jung

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Clays from tidal flat sediments showed efficient catalytic activity in the decomposition of PCE by gamma-radiation. The highest PCE removal of 98.6% was obtained with clays heated to 700°C after acid treatment. The improved catalytic activity was identified by electron paramagnetic resonance (EPR) spectroscopy. The EPR spectra of clays were significantly changed by the acid and thermal treatments. The intensity of a narrow signal at g = 2 (signal III) was decreased with increasing thermal treatment temperature and this increased the PCE removal efficiency. The acid treatment completely removed a broad signal at g = 2 (signal II), decreased the intensity of signal III, and improved the gamma-radiation treatment of PCE.

Original language	English
Pages (from-to)	1383-1387
Number of pages	5
Journal	Chemosphere
Volume	57
Issue number	10
DOIs	https://doi.org/10.1016/j.chemosphere.2004.09.025
Publication status	Published - 2004 Dec

Bibliographical note

Funding Information:
This study was supported by Korea Institute of Science & Technology Evaluation and Planning (KISTEP) and Ministry of Science & Technology (MOST), Korean government, through its National Nuclear Technology Program.

Keywords

Clay
EPR
Gamma-radiation
PCE
Radiocatalysis

ASJC Scopus subject areas

Environmental Engineering
General Chemistry
Environmental Chemistry
Pollution
Public Health, Environmental and Occupational Health
Health, Toxicology and Mutagenesis

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.chemosphere.2004.09.025

Cite this

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title = "EPR characterization of the catalytic activity of clays for PCE removal by gamma-radiation induced by acid and thermal treatments",

abstract = "Clays from tidal flat sediments showed efficient catalytic activity in the decomposition of PCE by gamma-radiation. The highest PCE removal of 98.6% was obtained with clays heated to 700°C after acid treatment. The improved catalytic activity was identified by electron paramagnetic resonance (EPR) spectroscopy. The EPR spectra of clays were significantly changed by the acid and thermal treatments. The intensity of a narrow signal at g = 2 (signal III) was decreased with increasing thermal treatment temperature and this increased the PCE removal efficiency. The acid treatment completely removed a broad signal at g = 2 (signal II), decreased the intensity of signal III, and improved the gamma-radiation treatment of PCE.",

keywords = "Clay, EPR, Gamma-radiation, PCE, Radiocatalysis",

author = "Chung, {Hung Ho} and Choi, {Sang Won} and Ok, {Yong Sik} and Jinho Jung",

note = "Funding Information: This study was supported by Korea Institute of Science & Technology Evaluation and Planning (KISTEP) and Ministry of Science & Technology (MOST), Korean government, through its National Nuclear Technology Program.",

year = "2004",

month = dec,

doi = "10.1016/j.chemosphere.2004.09.025",

language = "English",

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pages = "1383--1387",

journal = "Chemosphere",

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TY - JOUR

T1 - EPR characterization of the catalytic activity of clays for PCE removal by gamma-radiation induced by acid and thermal treatments

AU - Chung, Hung Ho

AU - Choi, Sang Won

AU - Ok, Yong Sik

AU - Jung, Jinho

N1 - Funding Information: This study was supported by Korea Institute of Science & Technology Evaluation and Planning (KISTEP) and Ministry of Science & Technology (MOST), Korean government, through its National Nuclear Technology Program.

PY - 2004/12

Y1 - 2004/12

N2 - Clays from tidal flat sediments showed efficient catalytic activity in the decomposition of PCE by gamma-radiation. The highest PCE removal of 98.6% was obtained with clays heated to 700°C after acid treatment. The improved catalytic activity was identified by electron paramagnetic resonance (EPR) spectroscopy. The EPR spectra of clays were significantly changed by the acid and thermal treatments. The intensity of a narrow signal at g = 2 (signal III) was decreased with increasing thermal treatment temperature and this increased the PCE removal efficiency. The acid treatment completely removed a broad signal at g = 2 (signal II), decreased the intensity of signal III, and improved the gamma-radiation treatment of PCE.

AB - Clays from tidal flat sediments showed efficient catalytic activity in the decomposition of PCE by gamma-radiation. The highest PCE removal of 98.6% was obtained with clays heated to 700°C after acid treatment. The improved catalytic activity was identified by electron paramagnetic resonance (EPR) spectroscopy. The EPR spectra of clays were significantly changed by the acid and thermal treatments. The intensity of a narrow signal at g = 2 (signal III) was decreased with increasing thermal treatment temperature and this increased the PCE removal efficiency. The acid treatment completely removed a broad signal at g = 2 (signal II), decreased the intensity of signal III, and improved the gamma-radiation treatment of PCE.

KW - Clay

KW - EPR

KW - Gamma-radiation

KW - PCE

KW - Radiocatalysis

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U2 - 10.1016/j.chemosphere.2004.09.025

DO - 10.1016/j.chemosphere.2004.09.025

M3 - Article

C2 - 15519383

AN - SCOPUS:7444222322

SN - 0045-6535

VL - 57

SP - 1383

EP - 1387

JO - Chemosphere

JF - Chemosphere

IS - 10

ER -

EPR characterization of the catalytic activity of clays for PCE removal by gamma-radiation induced by acid and thermal treatments

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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