International Journal of Chemical Engineering / 2012 / Article / Tab 2

Research Article

Valorization of Agroindustrial Wastes as Biosorbent for the Removal of Textile Dyes from Aqueous Solutions

Table 2

Chemical and physical characterization of adsorbents.

Brewer’s spent grainsOrange peel

Point of zero charge5.33.5
pHwater
pHKCl  1.0 M
Surface acidity (NaOH) mmol g−1
Surface basicity (HCl) mmol g−1
Methylene Blue Index mg g−164.9178.7