The Adsorption Efficiency of Chemically Prepared Activated Carbon from Cola Nut Shells by ZnCl₂ on Methylene Blue

Table 1

Summary of the BET (m²/g), pore volume (cm³/g), pore size (Å) and surface aspect of the chemically prepared activated carbon by ZnCl₂ from cola nut shells.

Adsorbent	BET (m^2/g)	Pore volume	Pore size (Å)	Surface aspect
AC	Surface area at 𝑝/𝑝^∘ = 0.206156171: 663.6573 m²/g; BET Surface Area: 647.7374 m²/g	Adsorption total pore volume of pores 0.332061 cm³/g	Adsorption average pore width (4V/A by BET): 20.5059 Å	Heterogeneous with micropores and mesopores
	Adsorption cumulative surface area of pores 86.433 m²/g	Adsorption cumulative volume of pores 0.082139 cm³/g	Adsorption average pore diameter (4V/A): 38.013 Å
	Desorption cumulative surface area of pores 93.3700 m²/g	Desorption cumulative volume of pores 0.082827 cm³/g	Desorption average pore diameter (4V/A): 35.483 Å