The English name for the element potassium comes from the word "potash", and refers to the method by which potash was obtained – leaching the ash of burnt wood or tree leaves and evaporating the solution in a pot.
The concentrations of Th and REEs in the oxalate concentrate were chosen to simulate the oxalate intermediate product previously obtained from leach liqueur.
Concentrations of Hg in water leachates obtained from leaching of mine wastes varied widely from <0.001 to 760 µg of Hg in leachate/g of sample leached, but only one leachate exceeded the USEPA Hg industrial soil screening level of 31 µg/g.
The results already obtained in leaching tests are presented and discussed in the paper.
After the separation, pure Cu can be obtained by leaching out the residual Fe with acid.
Among the trace metals originally present in the HOFA (Table 2), only minor concentrations were obtained through leaching tests.
The mineral source obtained higher leaching of P and between the organic sources the bovine and swine manure.
In particular, the tubular pores have been obtained by leaching of melt spun saccharide fibers (cotton candy) within CO2-foamed poly(ε-caprolactone).
Although the obtained metal leaching efficiency using Acetobacter sp. culture supernatant is less as compared to 80% acetic acid, still a fairly good leaching efficiency is observed (Figs. 2a, 7).
Similar kinetic behavior was observed during sphalerite dissolution in acidic ferric sulphate and ferric chloride solutions, but the reaction rate constants obtained by leaching in chloride solutions were about tenfold higher than those in sulphate solutions.
