Soil is an important compartment in the environmental cycling of trichloroacetic acid (TCA), but soil TCA concentration is a methodologically defined quantity; analytical methods either quantify TCA in an aqueous extract of the soil, or thermally decarboxylate TCA to chloroform in the whole soil sample. The former may underestimate the total soil TCA, whereas the latter may overestimate TCA if ...

In the present investigation, selective recovery of nickel from a leach solution delaminated metal clads obsolete mobile phone PCBs using industrial reagent ACORGA M5640 has been studied. As first step, copper is selectively separated mixed liquor by solvent extraction at pH 2, to leave nickel-rich raffinate solution. A second stage process conducted 8 then permits nickel. Small quantities zinc...