Abstract Detailed investigation of photocatalyzed degradation dibutyl phthalate (DBP), an endocrine disrupter, in the presence α -FeOOH (goethite) and different carboxylic acids is focus this study. To get a better insight into efficiency degradation, influence parameters, such as concentration total Fe Fe(II), dissolved oxygen, DBP concentration, pH salinity investigated. The reaction mechanis...

Previous research has shown that adsorption of many inorganic anions on soil mineral surfaces can be described equally well by chemical surface complexation models using either inneror outer-sphere surface complexes. At the same time, goodness of fit of these models to adsorption data has been used to distinguish between innerand outer-sphere adsorption mechanisms. In this study the ability of ...

FRACTIONATION BETWEEN AQUEOUS FE(II) AND GOETHITE. B. L. Beard and R. Handler, M. M. Scherer, L. Wu, A. D. Czaja, A. Heimann, C. M. Johnson Department of Geosciences, 1215 W. Dayton Street, University of Wisconsin, Madison, WI 53706, USA, NASA Astrobiology Institute, University of Wisconsin, 3 Dept of Civil and Environmental Engineering, The University of Iowa, 4126 Seamans Center for the Engin...

The effect of iron substrates and growth conditions on in vitro dissimilatory iron reduction by membrane fractions of Shewanella oneidensis MR-1 was characterized. Membrane fractions were separated by sucrose density gradients from cultures grown with O(2), fumarate, and aqueous ferric citrate as the terminal electron acceptor. Marker enzyme assays and two-dimensional gel electrophoresis demons...

The magnitude and temperature-sensitivity of oxygen isotope fractionation in ferric oxide-water systems remain uncertain. In this study, three different synthetic methods are used to investigate the temperature dependence of the fractionation between water and hematite, akaganeite, and goethite at near-surface temperatures. Our results reveal two similarities among these ferric oxide-water syst...

A recent study (D. C. Cooper, F. W. Picardal, A. Schimmelmann, and A. J. Coby, Appl. Environ. Microbiol. 69:3517-3525, 2003) has shown that NO(3)(-) and NO(2)(-) (NO(x)(-)) reduction by Shewanella putrefaciens 200 is inhibited in the presence of goethite. The hypothetical mechanism offered to explain this finding involved the formation of a Fe(III) (hydr)oxide coating on the cell via the surfac...

A series of mixed iron and titanium oxide coprecipitates ranging in composition between 0 < Ti/Ti + Fe < 1 was synthesized and aged under varying conditions of pH, temperature and time in order to establish a working model for pedogenic titanium and titano-ferric oxides. X-ray powder diffraction (XRD), selective chemical dissolution, magnetic susceptibility, charge distribution and electron opt...

Minerals control many soil functions and play a crucial role in addressing global existential issues. Measuring the abundance of minerals is laborious, costly, time-consuming task; however, spectroscopy can be useful tool to overcome this issue. This work aimed map major mineralogical components soils Brazil from surface 1 m deep at spatial resolution 30 m. Spectral data Brazilian Soil Library ...

The Fragnè mine, located in the Lanzo valley municipality of Chialamberto (Turin, Piedmont Region), represented most important regional site for Fe–Cu sulfide exploitation over a period more than eighty years (1884–1965). entire mining area is part structural complex Lower Unit Western Alps, characterized by presence amphibolite, metabasite (“prasinite”), and metagabbroic rocks. In particular, ...