Separation of Spherical Nanosilica from Agricultural Wastes in Vietnam via Ultrasonic-Assisted Precipitation and Application for Effective Removal of Methylene Blue from Aqueous Solution

Figure 12

Nonlinearized Langmuir (a) and Freundlich (b) isotherm studies on MB adsorption of BA-SiO₂, RHA-SiO₂, and pure-SiO₂.

(a)

(b)