Catalytic wet peroxide oxidation of formic acid in wastewater with naturally-occurring iron ore

Abstract

Apart from the large-scale exploitation of iron containing ore as raw material feed for iron extraction, it is one of the few naturally-occurring minerals that have been exploited for alternative applications. As a result, numerous studies report on the use of iron-containing minerals as adsorbents (Nowack et al., 2006; Rovira et al., 2008; Zeng et al., 2004; Spiteri et al., 2008; Guo et al., 2007; Zhang et al., 2004; Pirillo et al., 2009) and catalysts (Costa et al., 2008; Huang et al., 2000; Centi et al., 2000; Andreozzi et al., 2003; Duet al., 2008) for the removal of pollutants from wastewaters. Formic acid is a pollutant in wastewater from the efflu ents of some industries (Claudel et al., 1984). It is also a stable intermediate from the decomposition of many organic pollut ants (Chou et al., 1998; Davis et al., 1999; Hwang et al., 1999; Dinsdale et al., 2000), which is difficult to oxidize further (Ogata et al., 1981; Harmsen et al., 1997).

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