Journal
WATER RESEARCH
Volume 39, Issue 13, Pages 3073-3081Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2005.05.012
Keywords
Pd-Sn catalysts; nitrate; catalytic reduction; drinking water; formic acid
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The reduction of nitrate in nitrogen using bimetallic palladium tin catalysts and hydrogen is an interesting process for water treatment. The aim of the present study is to use formic acid (FA) as a reducing agent and a pH buffer in order to substitute the mixture of hydrogen and carbon dioxide. The catalytic performances of a palladium tin catalyst supported on silica were evaluated in the presence of FA, as a function of the initial acid concentration and of the gas phase (N-2, CO2, or H-2). Results were compared to those obtained with hydrogen in the presence of carbon dioxide. Similar mechanisms seem to explain the identical catalytic performances observed with these two reducing agents. (c) 2005 Elsevier Ltd. All rights reserved.
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