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

Figure 2

Langmuir (a–c), Freundlich (d–f), Dubinin–Radushkevich (g–i) isotherms, and pseudo-second-order kinetics (j–l) model of Pb²⁺, Cd²⁺, and Ni²⁺adsorption on EPS.

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(b)

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(g)

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(i)

(j)

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(l)