KOPS - Das Institutionelle Repositorium der Universität Konstanz

Cysteine-Mediated Reductive Dissolution of Poorly Crystalline Iron(III)Oxides by Geobacter sulfurreducens

Cysteine-Mediated Reductive Dissolution of Poorly Crystalline Iron(III)Oxides by Geobacter sulfurreducens

Zitieren

Dateien zu dieser Ressource

Prüfsumme: MD5:3650bbf174088797ae4b1f3ff068c1fc

DOONG, Ruey-An, Bernhard SCHINK, 2002. Cysteine-Mediated Reductive Dissolution of Poorly Crystalline Iron(III)Oxides by Geobacter sulfurreducens. In: Environmental Science & Technology. 36(13), pp. 2939-2945. ISSN 0013-936X. eISSN 1520-5851

@article{Doong2002Cyste-8828, title={Cysteine-Mediated Reductive Dissolution of Poorly Crystalline Iron(III)Oxides by Geobacter sulfurreducens}, year={2002}, doi={10.1021/es0102235}, number={13}, volume={36}, issn={0013-936X}, journal={Environmental Science & Technology}, pages={2939--2945}, author={Doong, Ruey-An and Schink, Bernhard} }

eng 2002 The reductive dissolution of poorly crystalline ferric oxides in the presence of cysteine was investigated to evaluate the potential of cysteine as a possible electron carrier to stimulate the reduction of iron(III) oxides by Geobacter sulfurreducens. The extent and rate of biotic and abiotic reduction of iron(III) oxides in the presence of cysteine at various concentrations were compared. Iron(III) oxides were reduced abiotically by cysteine. The initial rate and extent of iron(III) oxide reduction were correlated linearly with the cysteine concentration ranging from 0 to 6 mM. Also, addition of 0.5-2 mM cysteine significantly stimulated the rate and the extent of iron(III) oxide reduction in cultures of G. sulfurreducens. The cysteine concentration decreased in accordance with the increase of Fe(II) concentration and reached a nearly constant residual concentration. Cysteine depletion followed first-order kinetics and increased linearly with the cysteine concentration. An 8- to 11-fold increase in the extent of iron(III) oxide reduction relative to the abiotic system was observed. Comparison of sorbed and dissolved Fe(II) concentrations between cultures amended with cysteine and with other organic chelators showed that solubilization is not the main factor in cysteine-stimulated Fe(III) reduction. Addition of cystine could enhanced the extent of iron(III) oxide reduction, concomitant with the increase of the regenerated cysteine concentration and support the hypothesis that cysteine could serve as an electron carrier to transfer electrons from G. sulfurreducens to poorly crystalline iron(III) oxides. 2011-03-24T17:47:08Z First publ. in: Environmental Science & Technology 36 (2002), pp. 2939-2945 2011-03-24T17:47:08Z Doong, Ruey-An Schink, Bernhard Schink, Bernhard Doong, Ruey-An deposit-license application/pdf Cysteine-Mediated Reductive Dissolution of Poorly Crystalline Iron(III)Oxides by Geobacter sulfurreducens

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

Cysteine_Mediated_Reductive_Dissolution_of_Poorly_Crystalline_IronIIIOxides_by_Geobacter_sulfurreducens.pdf 127

Das Dokument erscheint in:

KOPS Suche


Stöbern

Mein Benutzerkonto