Lignin and Cellulose Extraction from Vietnam’s Rice Straw Using Ultrasound-Assisted Alkaline Treatment Method

Table 1

Elemental composition in inner layer and outer layer of the rice straw.

Sample	Content, %
	C	O	Mg	Al	Si	Cl	K	Ca
Outer surface	36.88 ± 1.195	46.52 ± 0.849	0.16 ± 0.014	0.22 ± 0.021	13.92 ± 0.537	0.715 ± 0.092	1.43 ± 0.106	0.17 ± 0.035
Inner surface	44.75 ± 0.919	45.99 ± 2.666	0.60 ± 0.092	0.09 ± 0.077	4.78 ± 1.259	0.65 ± 0.014	2.67 ± 0.608	0.28 ± 0.007