Arsenite Binding to Sulfhydryl Groups in the Absence and Presence of Ferrihydrite: A Model Study

• Published in: Environmental science & technology Vol. 48; no. 7; pp. 3822 - 3831
• Main Authors: Hoffmann, Martin, Mikutta, Christian, Kretzschmar, Ruben
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.04.2014
• Subjects: Acidity; Adsorbents; Adsorption; air; Applied sciences; arsenic; arsenites; Arsenites - chemistry; Binding sites; Biological and physicochemical phenomena; Biological and physicochemical properties of pollutants. Interaction in the soil; Bioremediation; Earth sciences; Earth, ocean, space; Engineering and environment geology. Geothermics; Environment; estuaries; Exact sciences and technology; Ferric Compounds - chemistry; ferrihydrite; Hydrogen-Ion Concentration; Kinetics; Ligands; marshes; Minerals - chemistry; Models, Theoretical; Natural water pollution; Organic chemistry; organic matter; Oxidation; Oxidation-Reduction; peatlands; plants (botany); Pollution; Pollution, environment geology; Protons; redox potential; remediation; Resins, Synthetic - chemistry; Soil and sediments pollution; Sulfhydryl Compounds - chemistry; sulfhydryl groups; Water treatment and pollution; water vapor; X-Ray Absorption Spectroscopy; Complexation; Organic matter; Arsenic; Pollutant behavior; Organic ligand; Surface complexation model; Stability constant; Soil pollution; Sediments; Arsenites; Iron Hydroxides oxides; Trace element; Carcinogen; Sulfhydryl radicals; Poison; Water pollution; Wetland

Binding of arsenite (As(III)) to sulfhydryl groups (Sorg(-II)) plays a key role in As detoxification mechanisms of plants and microorganisms, As remediation techniques, and reduced environmental systems rich in natural organic matter. Here, we studied the formation of Sorg(-II)–As(III) complexes on...