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Efficient decomposition of perchlorate to chloride ions in subcritical water by use of steel slag

Efficient decomposition of perchlorate to chloride ions in subcritical water by use of steel slag Decomposition of perchlorate (ClO4 −) in subcritical water in the presence of steel slag, a by-product of the steel industry, was investigated. Reactivity of ClO4 − was low in pure subcritical water state up to 300 °C, whereas adding steel slag efficiently accelerated the decomposition of ClO4 − to Cl−, with no leaching of heavy metals such as chromium and other environmentally undesirable elements (boron and fluorine). When the reaction was performed in subcritical water at a relatively low temperature (250 °C) for 6 h, virtually all ClO4 − ions were removed from the reaction solution. The concentration of Cl− after the reaction was well accounted for by the sum of the amount of Cl− ascribed to the decomposition of ClO4 − and the amount of Cl− leached from the slag. This method was successfully applied to decompose ClO4 − in water samples collected from a man-made reflection pond following a fireworks display, even though these samples contained much higher concentrations of Cl− and SO4 2− than ClO4 −. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Environmental Science and Pollution Research Springer Journals

Efficient decomposition of perchlorate to chloride ions in subcritical water by use of steel slag

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References (41)

Publisher
Springer Journals
Copyright
Copyright © 2016 by Springer-Verlag Berlin Heidelberg
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
DOI
10.1007/s11356-016-7332-7
Publisher site
See Article on Publisher Site

Abstract

Decomposition of perchlorate (ClO4 −) in subcritical water in the presence of steel slag, a by-product of the steel industry, was investigated. Reactivity of ClO4 − was low in pure subcritical water state up to 300 °C, whereas adding steel slag efficiently accelerated the decomposition of ClO4 − to Cl−, with no leaching of heavy metals such as chromium and other environmentally undesirable elements (boron and fluorine). When the reaction was performed in subcritical water at a relatively low temperature (250 °C) for 6 h, virtually all ClO4 − ions were removed from the reaction solution. The concentration of Cl− after the reaction was well accounted for by the sum of the amount of Cl− ascribed to the decomposition of ClO4 − and the amount of Cl− leached from the slag. This method was successfully applied to decompose ClO4 − in water samples collected from a man-made reflection pond following a fireworks display, even though these samples contained much higher concentrations of Cl− and SO4 2− than ClO4 −.

Journal

Environmental Science and Pollution Research – Springer Journals

Published: Aug 3, 2016

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