Figure 3.

Decolorization efficiency of the LPO modified silica NPs. (a) Photographs of the decolorization samples of Congo red (I), crystal violet (II), methylene blue (III), methyle red (IV) and commassie blue R250 (V) at concentration of 500 mg/L at pH 7.0 as control (1) by the LPO modified silica NPs (2.5 mg/l) in the presence or absence of H₂O₂ (2 and 3) and by silica NPs (2.5 mg/l) in presence or absence of H₂O₂ (4 and 5). (b) Decolorization percentages of Congo red (CR), crystal violet (CV), methylene blue (MB), methyle red (MR) and commassie blue R250 (CB) at concentration of 500 mg/L by the LPO modified silica NPs (2.5 mg/l) in presence of 3.2 mM H₂O₂.