1) we installed piezometer clusters to measure depth to water table at 0.5, 1.0, 1.5, and 4.0m below ground level (bgl); platinum electrodes to measure soil
redox potential at 0.2, 0.5, 1.0, and 2.0 m bgl; and soil solution samplers at 0.2, 0.5, 1.0, and 4.0 m bgl.
Sample Major phases Minor phases Copper concentrate Chalcopyrite Pentlandite (leach residue) ([CuFeS.sub.2]) [[(Fe Ni).sub.9] [S.sub.4]] Hydronium jarosite [[H.sub.3]o [Fe.sub.2] [([SO.sub.4)].sub.3] O[H.sub.6])] Table 5:
Redox potentials of the pulp during bacterial leaching (Tf- 44).
Effect of fluctuating rhizosphere
redox potential on carbon assimilation of Spartina alterniflora.
In all the samplings, the
redox potential in the deepest layers decreases rapidly to reach a maximum value of reduction (-315 [+ or -] 83 mV) at 50 mm depth.
To convert the magnitude of the
redox potential change into some measure of energy, use the following equation:
Redox potential was measured with platinum electrodes constructed by welding 1.5 cm of 1-mm-diameter platinum wire to insulated, solid copper wire and sealing it with epoxy resin so that only bare platinum wire was in contact with soil (DeLaune et al.
Thus, oxidation of the media
redox potential in the absence of cells reflected a decrease in Cys rather than an increase in CySS (Figures 2(a) and 2(b)).
Unlike hydroquinone the
redox potential of L-cysteine in the pH range of our study is not affected as much.
The facts of solubility of Cd varying with soil
redox potential and the greater availability of As under anaerobic condition than aerobic environment support the possibility of reducing As and Cd accumulation in rice grain through water management [14,15].
It has also been shown that the
redox potential of adsorbed dye depends on the pH of the electrolyte and on the potential applied to the semiconductor [5].
The sequence of electron acceptors used as the
redox potential decreases is well described in the literature (Patrick and Reddy 1978; Marschner 1995; Fageria et al.
It could be seen that the standard
redox potential of
