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Updated: Aug 15, 2026

Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of Manganese(II) Acetylacetonate
Published on: June 18, 2020
Conversion of adamsite (phenarsarzin chloride) by fungal manganese peroxidase
R Haas1, O Tsivunchyk, K Steinbach
1Office of Environmental Investigation and Research, Stadtwaldstrasse 45a, 35037 Marburg, Germany. haasr@gmx.net
Abstract:
Fungal manganese peroxidase was found to convert the persistent chemical warfare agent adamsite (phenarsarzin chloride) in a cell-free reaction mixture containing sodium malonate, Mn(2+) ions, and reduced glutathione. The organo-arsenical compound disappeared completely within 48 h accompanied by the formation of a more polar metabolite with a clearly modified UV spectrum. Thus, As(III) in the adamsite molecule was oxidized by manganese peroxidase to As(V) which added dioxygen and released chloride.
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