Specific Surface Area Enhancement of Waste Tire-Based Activated Carbon by Demineralization Technique and Adsorption of Methylene Blue

Figure 4

A SEM image for a sample demineralized with solvent (only HNO₃) with different magnifications of 7234× (a) and 5534× (b) and demineralized with solvent (H₂SO₄ and NaOH in 1 : 1 ratio) with different magnifications of 13,287× (c) and 25,400× (d) and not the demineralized sample of WTAC (e).

(a)

(b)

(c)

(d)

(e)