The carbon extracted from fly ash generated from Corner Brook Pulp and Paper Limited was transformed to activated carbon through physical activation process in a high temperature tube furnace in this study. Effects of two factors including activation temperature and activation time were investigated. Iodine number, methylene blue value, surface microstructure, surface area and pore volume were analyzed to assess the adsorption capacity of different carbon samples. The sample with highest iodine number and methylene blue value was selected to conduct further assessment on surface area and pore volume. The results reveal significant pore development after activation.
After characterization of lab-generated activated carbon, batch test was conducted to evaluate the adsorption efficiency of the activated carbon on natural organic matter removal. The results show that a dose of 0.5g of AC for each liter of water has the highest adsorption effectiveness. A column filtration technology was developed to further evaluate the adsorption capacity of the activated carbon. Water sample from a local community was continuously passed through the column for 24 hours. The organic matter, measured as total organic matter, in the water sample before and after the filtration was analyzed. Results indicate that more than 60% of the organic matter can be removed by the carbon barrier within 2 hours filtration. The study shows that the carbon barrier is effective in the adsorption of light-sensitive organic matters. In summary, this study will not only help CBPP with their waste management, but it will also provide a cost-effective filtration technology in the water treatment field.
The full report can be found here.