Experimental
2.1. Materials
Commercial coconut shell based PAC (surface area
1258 m2 g1 and pore volume 0.798 cm3 g1) was provided by
Tra Bac Joint Stock Company, Viet Nam. For impregnating activated
carbons, Fe(NO3)39H2O (obtained from Xilong Chemical
Factory, Guangdong) was employed as a magnetic precursor. Nitric
acid (HNO3 65%), which was used as a carbon modifying
agent, was purchased from Merck. For the adsorption, methyl orange
was chosen as the model organic pollutant. The structure of
the dye is as follows Hydrogen peroxide solution (>30%) used as an advanced oxidation
agent was purchased from the Shanghai Chemical Company.