Comparing the Heterogeneity of Copper-Binding Characteristics for Two Different-Sized Soil Humic Acid Fractions Using Fluorescence Quenching Combined with 2D-COS

<table>Representative fluorescence quenching curves for the (a) 1–10 K fraction and (b) the &gt;100 K fraction of the soil HA. The lines represent model-predicted values.</table>

The Scientific World Journal

fig3

Figure 3

Figure 3: Comparing the Heterogeneity of Copper-Binding Characteristics for Two Different-Sized Soil Humic Acid Fractions Using Fluorescence Quenching Combined with 2D-COS 

Figure 3 | Comparing the Heterogeneity of Copper-Binding Characteristics for Two Different-Sized Soil Humic Acid Fractions Using Fluorescence Quenching Combined with 2D-COS 