Preparation of sludge derived magnetic porous carbon and their application in Fenton-like degradation of 1-diazo-2-naphthol-4-sulfonic acid.
A magnetic porous carbon containing Fe(3)O(4) (FPC) has been synthesized by a novel activation and carbonization process of sewage sludge without extra addition of ferric ions. Properties of FPC carbonized at 600, 800 and 1000 °C were studied using N(2) adsorption and desorption isotherms, X-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer. The results indicate that FPC carbonized at 600 °C has a superior porous structure and high pore volume (0.504 mL/g). Further study found that Fe(3)O(4) is dominating in the presence of iron in FPC carbonized at 600 °C. The resulting chars shows higher catalytic activity in 1-diazo-2-naphthol-4-sulfonic acid (1,2,4-Acid) oxidation than commercial Fe(3)O(4) MNPs. The 1,2,4-Acid and TOC removal efficiency can reach 96.6% and 87.2% after 260 min Fenton-like treatment. The mechanism in FPC-H(2)O(2) system may include a Haber-Weiss type reaction between the active sites (e.g. Fe(3)O(4)) in FPC and hydrogen peroxide.
College of Environmental Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China.
Lin
L
Gu
Nanwen
N
Zhu
Pin
P
Zhou
D001391:Azo Compounds / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D008280:Magnetics; D058185:Magnetite Nanoparticles / Q000648:ultrastructure; D009282:Naphthalenesulfonates / Q000737:chemistry*; D016062:Porosity; D059027:Recycling; D012722:Sewage / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry*; D013696:Temperature
D001391:Azo Compounds; C045076:Fenton's reagent; D058185:Magnetite Nanoparticles; D009282:Naphthalenesulfonates; D012722:Sewage; D013451:Sulfonic Acids; D002244:Carbon; D006861:Hydrogen Peroxide; D007501:Iron