Journal of Environmental Analytical Chemistry

ISSN: 2380-2391

Open Access

Adrian A Ammann

EAWAG, Swiss Federal Institute of Aquatic Science and Technology,
PO Box 611, CH-8600, Dübendorf

  • Research Article
    Hydroxyl Radical Production by Light Driven Iron Redox Cycling in Natural and Test Systems
    Author(s): Adrian A AmmannAdrian A Ammann

    Hydroxyl radicals (HO•) formation during the ligand stabilized iron redox cycling was investigated in synthetic media, expended algal growth media (Talaquil) and field collected fresh water. HO• were selectively reacted in situ with terephthalic acid producing hydroxyterephthalic acid, quantified by fluorescence. FeIIIEDTA, photoreactive in dim light, was used as a control to compare how media components influence HO• formation rates. Since HO• is highly reactive, transformation depends on to the number of reactive atoms in a media component. Protoporphyrin IX accelerated HO• formation 20-fold, providing a good model for studying rate accelerating components of algae excretion. The results show that HO• production under usual algal test and natural fresh water conditions differ, the latter being more toxic. They enable more reliably comparison between nat.. Read More»
    DOI: 10.4172/2380-2391.1000182

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