Figure 5
From: Partitioning of silver and chemical speciation of free Ag in soils amended with nanoparticles
Time evolution of silver fractionation. Speciation measurements of Ag+ and total solution Ag (presumed dissolved) following the addition of either nAg and AgNO3 for a long-term exposure of Ag in agricultural soil 2 (a) 25 mg Ag/kg dry soil (b) 50 mg Ag /kg dry soil. The blue diamonds represent free Ag+ for the AgNO3 treatment, the red squares are for the <0.45 μm fraction in the AgNO3 treatment, the green triangles are for free Ag+ for the nAg treatment and the purple X are for the <0.45 μm fraction in the nAg treatment.