Removal of Methylene Blue from Aqueous Solution Using Agricultural Residue Walnut Shell: Equilibrium, Kinetic, and Thermodynamic Studies

Table 1

BET-N₂ specific surface area of walnut shell (WS) particles with different sizes.

Particle size/mesh	20	60	80	120
Surface area/(m^2/g)	1.01	1.24	2.82	3.12