Role of Iron and Chromium Complexes in Environmental Self-cleaning Processes

Authors: Ciesla, Paweł; Mytych, Piotr; Kocot, Przemysław; Stasicka, Zofia

Source: Separation Science and Technology, Volume 42, Number 7, May 2007 , pp. 1651-1666(16)

Buy & download fulltext article:

Price: $56.94 plus tax (Refund Policy)

Abstract:

The present research includes solar-light-driven photocatalytic cycles based on the photoreductions of Fe(III), Cr(VI), and Cr(III) compounds with EDTA, oxalate and other ligands. Molecular oxygen is needed to close the photocatalytic cycles in which the metal species plays a role of photocatalyst; it affects the reaction mechanism and rate. The photoinduced electron transfer was also investigated in the presence of some external electron donors, such as EDTA, aliphatic alcohols, phenol, and its halogen derivatives, oxalate, nitrate(III), sulfate(IV). The results apply to the removal of such hazardous environmental pollutants as chromate(VI) or phenol derivatives and such recalcitrant pollutants as EDTA.

Keywords: Chromium(III) complexes; chromate(VI); EDTA; iron(III) complexes; phenol; photocatalysis; photoredox

Document Type: Research article

DOI: http://dx.doi.org/10.1080/01496390701290540

Affiliations: 1: Faculty of Chemistry, Jagiellonian University, Kraków, Poland

Publication date: 2007-05-01