Snail Shells Adsorbent for Copper Removal from Aqueous Solutions and the Production of Valuable Compounds

Figure 3

Kinetics of Cu(II) removal by SSP: (a) effect of time; (b) Elovich model; (c) pseudo-first-order model; (d) pseudo-second-order model (pH: 4.7; Cu(II) concentration: 100 mg·L⁻¹; dose: 8 g·L⁻¹; agitation speed: 200 rpm; particle size: 300 μm; temperature: 25°C).

(a)

(b)

(c)

(d)