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

Table 3

Comparison of the single-layer adsorption capacity (q_m) of MB on silica adsorbents.

Adsorbent	qm (mg·g^−1)	References
BA-SiO2	214.97	The present work
RHA-SiO2	169.21
Pure-SiO2	196.78
Rice husk silica	103.11	[52]
Modified nanosilica gel	9.54	[53]
Silica gel derived from Algerian siliceous by-product of kaolin	87.33	[54]
Silica nanospheres synthesized from TEOS	2.89	[55]
Dendritic silica nanoparticles	90.70	[56]
Silica nanoparticles prepared from diatomite	347.20	[57]