Auflistung Geochemie, Mineralogie, Petrologie nach Mitwirkenden "Noubactep, Chicgoua"
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Arsenic release from a natural rock under near-natural oxidizing conditions
The solubilization of arsenic (As) from an ore material (native Arsenic [As, trig.] with Lollingite [FeAs2, rh.]) was characterized in leaching tests lasting for ≤ 99 days. The experiments were performed with materials of ... -
Characterizing As, Cu, Fe and U solubilization by natural waters
Noubactep, Chicgoua; Schöner, A.; Schubert, M. (Springer-Verlag, Berlin/HeidelbergSpringer, Berlin/Heidelberg2008)The effects of carbonate concentration and the presence of in-situ generated iron oxide and hydroxide phases (iron oxyhydroxides) on arsenic (As), copper (Cu), and uranium (U) release from natural rocks were investigated ... -
Comments on: "Sorption of triazoles to soil and iron minerals" by Y. Jia et al. [Chemosphere 67 (2007) 250258]
This letter suggests possible improvements on the discussion of the adsorptive removal of triazoles by iron minerals which are possible corrosion products of elemental iron materials (Fe0) in a recent article by Jia et al. ... -
Comments on: "The effect of substituent groups on the reductive degradation of azo dyes by zerovalent iron" by M. Hou, et al. [J. Hazard. Mater. 145 (2007) 305]
This letter discusses possible improvements in experimental conditions to enable a purposeful discussion on the effect of substituent groups on the reductive degradation of azo dyes by elemental iron (Fe0) in a recent ... -
Effects of selected ligands on U (VI) immobilization by zerovalent iron
The effect of Cl-, CO32-, EDTA, NO2-, NO3-, PO43-, SO42-, and humic substances (HS)on the U(VI)co-precipitation from aqueous solutions by zerovalent iron (ZVI) was investigated in the neutral pH range.Batch experiments ... -
Elemental iron (Fe0) for better drinking water in rural areas of developing countries
Many of the reasons behind the anthropogenic contamination problems in rural environments of developing countries lie in changes in the traditional way of life and the ignorance on the toxic potential of introduced ... -
Investigating the mechanism of Uranium removal by zerovalent iron
Zerovalent iron (ZVI) has been proposed as a reactive material in permeable in situ walls for groundwater contaminated by metal pollutants. For such pollutants that interact with corrosion products, the determination of ... -
Investigating the release of coprecipitated uranium from iron oxides
Noubactep, Chicgoua; Schöner, A.; Dienemann, H. (Journal of radioanalytical and nuclear chemistry, 2006)The removal of uranium (VI) from zerovalent iron permeable reactive barriers and wetlands can be explained by its association with iron oxides. The long term stability of immobilized U is yet to be addressed. The present ... -
Laboruntersuchungen zur Freisetzung von Unat aus einem Gestein unter oxischen naturnahen Bedingungen
The effects of carbonate concentration and the presence of iron hydroxide phases on uranium release into the environment were investigated under oxic conditions and in the pH range from 6 to 9. For this purpose not-shaken ... -
Mechanism of uranium removal from the aqueous solution by elemental iron
The effectiveness of elemental iron (Fe0) to remove uranium (U) from the aqueous phase has been demonstrated. While the mitigation effect is sure, discrepancies in the removal mechanism have been reported. The objective ... -
On the validity of specific rate constants (kSA) in Fe0/H2O systems
The validity of the specific reaction rate constants (kSA) in modelling contaminant removal in Fe0/H2O systems is questioned. It is shown that the current kSA-model does not consider the large reactive surface area provided ... -
Processes of Contaminant Removal in Fe0-H2O Systems Revisited: The Importance of Co-Precipitation
The mechanism of aqueous contaminant removal by elemental iron (Fe0) materials (e.g., in Fe0-H2O systems) has been largely discussed in the iron technology literature. Two major removal mechanisms are usually discussed: ... -
Testing the Suitability of Zerovalent Iron Materials for Reactive Walls
Noubactep, Chicgoua; Meinrath, Günther; Dietrich, Peter; Sauter, Martin; Merkel, Broder J. (Environmental Chemistry, 2004)Zerovalent iron (ZVI) has been proposed as reactive material in permeable in situ walls for contaminated groundwater. An economically feasible ZVI-based reactive wall requires cheap but efficient iron materials. From an ... -
Uranium release from a natural rock under near-natural oxidizing conditions
Understanding how uranium (U) moves through the soil and groundwater is essential to determine the effectiveness of cleanup technologies. Uranium release and transport in the subsurface under oxic conditions have been ...