Assertion: leaching | /r/CapableOf | increase pb concentrations
Facets:
value: by 150 ppm
type: OTHER
Source sentences:
text: Leaching was most rapid in the first 70 hours, mobilising 3530 ppm Pb, and then decreased radically, only increasing Pb concentrations by 150 ppm over the remaining 700 hours of the experiment, as the system approached equilibrium.