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 1

Comparison of MB adsorption capacity of BA-SiO₂, RHA-SiO₂, and pure-SiO₂.

Materials		BA-SiO2	RHA-SiO2	Pure-SiO2
C°MB (mg·L^−1)
qe (mg·g^−1)	10	41.9	41.2	41.7
	20	73.5	69.9	75.8
	30	99.2	95.0	103.3
	40	137.4	124.1	141.7
	50	154.1	142.5	158.3