Auflistung nach Schlagwort "Umweltgeochemie insgesamt"
Anzeige der Dokumente 1-20 von 29
-
Analyse von Butylzinnverbindungen in Sedimenten mittels GC-AED
(Univ. Hamburg, 2007)Organotin compounds are variously used industrial chemicals. One of the most toxicological relevant compounds is tributyltin (TBT). TBT has been used as an effective component in antifouling paints for decades. Thus, it ... -
Aquatic Chemistry of Uranium
(Freiberg Online Geosciences; Vol. 01.1998) -
Arsenic release from a natural rock under near-natural oxidizing conditions
(Engineering in life sciences, 2008)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 ... -
Biogeochemistry of organotin and organolead compounds in a forested catchment in NE-Bavaria, Germany
(Univ. Bayreuth, 2004)Organotin-compunds (OTC) and Trimethyllead (TML) have a higher toxicity than their corresponding inorganic forms and may affect the functioning of ecosystems. Little is known about their behaviour and fate in the terrestrial ... -
Characterizing As, Cu, Fe and U solubilization by natural waters
(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 "Comparison of reductive dechlorination of p-chlorophenol using Fe0 and nanosized Fe0 by R. Cheng, et al. [J. Hazard. Mater. 144 (2007) 334]
(Journal of hazardous materials, 2007) -
Comments on "Decontamination of solutions containing EDTA using metallic iron"
(Journal of hazardous materials, 2009)This letter presents an improved discussion of the data provided in a recent article on EDTA removal from aqueous solutions using elemental iron (Fe0) by O. Gyliene and his co-workers. It is shown that the authors have ... -
Comments on: "Sorption of triazoles to soil and iron minerals" by Y. Jia et al. [Chemosphere 67 (2007) 250258]
(Chemosphere, 2007)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]
(Journal of hazardous materials, 2007)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
(Journal of radioanalytical and nuclear chemistry, 2006)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 ... -
Effects of the presence of pyrite and carbonate minerals on the kinetics of the uranium release from a natural rock
(Journal of radioanalytical and nuclear chemistry, 2006)The influence of calcite, dolomite, pyrite and vaterite on the kinetics of uranium (U) release from a natural rock under relevant i.e. field conditions has been investigated. The time dependence of the U release has been ... -
Elemental iron (Fe0) for better drinking water in rural areas of developing countries
(Springer, Berlin/Heidelberg2008)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
(Environmental Chemistry, 2005)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
(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 ... -
Isotopengeochemische Untersuchungen zum Stoffhaushalt geogen schwefelsaurer Bergbaurestseen des Lausitzer Braunkohlenreviers unter besonderer Berücksichtigung geochemisch gesteuerter Sanierungsverfahren
(Univ. Bochum, 2002)In den Folgelandschaften der ostdeutschen Braunkohlereviere entstanden in den vergangenen Jahrzehnten zahlreiche Bergbaurestseen mit pH-Werten kleiner 3. Potentielle Sanierungskonzepte für diese Seen beinhalten häufig ... -
Laboruntersuchungen zur Freisetzung von Unat aus einem Gestein unter oxischen naturnahen Bedingungen
(Grundwasser, 2005)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
(Journal of hazardous materials, 2006)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 ...