The realism of this doping mechanism is further demonstrated by a match to the measured maximum Cr solubility and small lattice contraction.Mengli SunJoshua StackhousePiotr M. KowalskiCommunications Materials
Kim et al. [72] used wastewater generated during electroplating process for the electricity production and chromium reduction in two different configuration a proton exchange membrane (PEM-MFC) and a bipolar membrane (BPM-MFC) of dual-chamber MFC, observed maximum power density of 47.2 and 150.5 ...
The maximum oxidation state shown byV(Z=23),Cr(Z=24),Co(Z=27),Sc(Z=21), are respectively View Solution Which of the following statement are correct aboutCr2+(Z = 24) andMn3+(Z = 25) ? (i)Cr2+is a reducing agent (ii)Mn3+is an oxidizing agent ...
2016). Natural processes have also lead to elevated chromium concentrations in groundwater above the World Health Organisation maximum for drinking water (50 μg/L; (WHO 2003)) at numerous locations around the world (Robertson 1991; Fantoni et al. 2002; Ball and Izbicki 2004; Steinpress 2005...
Based on experimental data, it was found that the maximum removal efficiency (R %) of Cr(VI) was 99.5 at pH 2 and 99.5 for E110 and E122 at pH 3, but decreased sharply and converged as the solution pH increased (Fig.9). This is consistent with other batch studies which also reporte...
Cu(I)/ NH3(aq)/Cl- complexes were investigated using estimates of NH3(aq) concentrations in cloudwater (e.g., maximum literature values) and thermodynamic-stability constants from Solis et al.83 These complexes were not found to be significant to Cu(I) speciation in the seven cases. Cu(I...
Fig.14 Change law of wear volume and maximum wear depth of Cr-coated Zr cladding with different cycles, normal load, amplitude, and frequency, and related fretting wear model[53] 图15 室温和 400 ℃条件下 Cr 涂层锆合金 和无涂层锆合金包壳...
Based on experimental data, it was found that the maximum removal efficiency (R %) of Cr(VI) was 99.5 at pH 2 and 99.5 for E110 and E122 at pH 3, but decreased sharply and converged as the solution pH increased (Fig.9). This is consistent with other batch studies which also reporte...
The optimized condition for the maximum adsorption was pH 2.07, temperature 30.72 °C, and dose/Cr(VI) concentration 160.93. The surface characteristics of the adsorbent were evaluated via pH zpc , FTIR, BET surface area, SEM-EDS, XRD, and XPS analysis. Functional groups like O-H, C-O, ...
Analyses of spatially resolved SR-FTIR spectra show that the maximum reduction of Cr(VI) to Cr(III) compounds occurs on surfaces densely populated by microorganisms. The oxidation state of Cr(III) compounds was confirmed by micro-x-ray absorption fine-structure spectroscopy. Both the time- and ...