. Author manuscript; available in PMC: 2013 Dec 15.

Published in final edited form as: J Colloid Interface Sci. 2011 Apr 27;360(2):10.1016/j.jcis.2011.04.065. doi: 10.1016/j.jcis.2011.04.065

Table 1.

Percentages of different elements, C/O and C/Si ratios of alkali-treated RH and RH-Br.

Rice Husk	Element surface composition (%)					Element ratio
Rice Husk	C 1s	N 1s	O 1s	Si 2p	Br 3d	C/O	C/Si
Alkali-treated RH	55.5	2.0	37.0	5.5	-	1.50	10.09
RH-Br	63.7	3.1	28.2	2.2	2.8	2.26	28.95