منابع مشابه
Microbial Reduction of Hexavalent Chromium
Publication 1. A. Manceau et al, “Quantitative Zn speciation in smelter-contaminated soils by EXAFS spectroscopy,” Am. J. Sci. (in press, 2000). Figure 3 (top) Soil samples were taken at several depths from a contaminated site. (bottom) Model compounds derived from polarized-EXAFS data at the ESRF and μ-EXAFS data at the ALS provide a good fit with powder-EXAFS spectra from a soil sample, there...
متن کاملSpectroscopic Determination of Chromium(Vl) during the Reduction of Chromium(VI) to Chromium(III)
Reduction of chromium(VI) to chromium(Ill) by thiourea between pH 3.0 and 5.5 is a key aspect of the chrominm(VI)/thiourea/polyacrylamide gel polymer system used in enhanced oil recovery processes. A method has been developed to determine chromium(Vl) concentration during the reduction of chromium(VI) to chromium(III) in this pH range. The reduction reaction is run in the presence of an acetic ...
متن کاملChromium diffusion and reduction in soil aggregates.
The distribution of metal contaminants such as chromium in soils can be strongly localized by transport limitations and redox gradients within soil aggregates. Measurements of Cr(VI) diffusion and reduction to Cr(III) were obtained in soil columns representing transects into soil aggregates in order to quantify influences of organic carbon (OC) and redox potentials on Cr transport distances and...
متن کاملThe effect of immobilization of Scenedesmus sp. ISC 109 on potential of reduction of Chromium
Recently, biological methods are used for remediation of various pollutants especially heavy metals. Algae are organisms which can accumulate and transform these pollutants with different mechanisms. In this regard immobilization of these microorganisms is a technique that is used for different purpose. So after primary screening of microalgae (Spirulina, Tetraselmis, Chlorella, Scenedesmus, Mi...
متن کاملIsolation of chromium resistant Bacillus sp. MRKV and reduction of hexavalent chromium potassium dichromate
The ability of Bacillus sp. MRKV isolated from tannery effluent which shows resistant towards hexavalent chromium potassium dichromate (K2Cr2O7) was evaluated in this study. The bacterial strain was assayed for its reducing ability towards K2Cr2O7. The study revealed that the isolated strain has the ability to reduce the hexavalent chromium and the optimal conditions required for the chromium r...
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ژورنال
عنوان ژورنال: The Philosophical Magazine
سال: 1832
ISSN: 1941-5850,1941-5869
DOI: 10.1080/14786443208647708