Sentence examples for initial leach from inspiring English sources

Table 6 shows the median pH of leachate collected from all columns during the initial leach period (≤ 7 months) ranged from 7.83 to 8.32, which was well above the carbonate buffer pH level of 6.37.

During three successive 4-h leaching experiments on MSH tephra, Taylor and Lichte (1980) reported that the initial leach extracted 75 ± 20%% of the total soluble Ca, Cl, Na and S release.

Most unweathered spoil samples will produce moderate initial leachate EC levels (≥1,000 µs/cm) over their initial leaching cycles.

Results showed that NO3− removals were consistently >99% for all media for initial leaching and steady-state periods.

It was observed that the acid concentration affected had the major influence on the initial leaching rate, while the molar ratio determined the maximum zinc extraction achieved.

Such investigations highlight the need to consider pollution swapping during the initial leaching period and should improve design criteria for field-scale bioreactors used to mitigate shallow groundwater NO3−.

The initial leaching rates were higher in the presence of the additives, suggesting that they inhibit the passivating species from interfering with the Au leaching reaction and assist this reaction by forming complexes with the released Au(I) ion.

The final leaching, however, depended mostly on the initial leaching, thus as leaching from fly ash and residue of wet flue-gas cleaning was lower before treatment compared to residues from semidry flue-gas cleaning, both Pb and Zn leaching could be reduced to lower levels in those materials, and they therefore appear more suitable for use in construction materials.

Similar to the leachate sample observations, higher Cl− concentrations were observed in pore water samples collected during the initial 7-month leach testing period.

The initial low K leaching rate followed by an increase in leaching for the 3ycomp (Fig. 2) may be explained by the lignin content.

The results showed that the leaching of Cd, Cu, Pb and Zn was reduced compared to the initial heavy metal leaching except when the pH was reduced to a level below 8 for the fly ash.