Journal of Industrial and Engineering Chemistry, Vol.11, No.5, 671-680, September, 2005
Electro-catalytic Removal of Water Pollutants by Silver-ACF from Piggery Waste
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The electro-catalytic removal (ECR) of water pollutants from wastewater using metal-ACF eletrodes was investigated over a wide range of ECR times. The ECR capacities of metallic ACF electrodes were related to a number of physical properties, such as the adsorption isotherm, surface area, and pore size, and to the reaction time. The surface morphologies and elemental analyses for the metal-supported ACFs after the electro-catalytic reactions were investigated using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy to explain the changes in the adsorption properties. The IR spectra of metallic ACFs, to investigate the functional groups, show that the electro-catalytic treatment is consequently associated with the removal of pollutants through the increasing surface reactivity of the activated carbon fibers. The metal-ACFs were electro-catalytically reacted with waste water to investigate the removal efficiencies for COD, T-N, NH4-N, NO3-N, and NO2-N. From these results for the removal of piggery waste using metallic ACFs substrate, satisfactory removal performance was achieved. The outstanding removal effects of the metallic ACFs substrate were determined by the properties of the material, with respect to the adsorption and trapping of organics, and by catalytic effects.
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