Fig. 4
From: Adsorption of Acid Yellow 36 and direct blue 86 dyes to Delonix regia biochar-sulphur
(a) SEM image of DRB-S using High vacuum SEM at magnification ×700 and 15.0 kV, and (b) particle pore size distribution of DRB-S.
Fig. 4 | Scientific Reports
