Biosorption Mechanism of Aqueous Pb²⁺, Cd²⁺, and Ni²⁺ Ions on Extracellular Polymeric Substances (EPS)

Figure 4

3D-EEM spectrum of EPS (a) before adsorption, and after adsorption of (b) Pb²⁺, (c) Cd²⁺, (d) Ni²⁺.

(a)

(b)

(c)

(d)