Characteristics and methylene blue adsorption performance of activated carbon prepared from cattle-manurecompost by ZnCl2 activation
2007 年 2007 巻 226 号 p. 25-31
詳細
2007 年 2007 巻 226 号 p. 25-31
The textural characteristics and surface chemistry were inspected for activated carbons (AC) prepared from cattle-manure-compost (CMC) by ZnCl2 activation at 400°C for 1 h. Methylene blue (MB) adsorption in aqueous phase onto the prepared AC was conducted to examine the potential capability as water treatment adsorbents in practical use. Furthermore outgassings in helium flow at 400°C and 900°C were performed to check the changes in carbon properties. N2 adsorptiondesorption, elemental analysis, pH of the point of zero charge (pHpzc) measurement and Boehm titration were employed for characterization. The prepared AC's exhibited excellent performance for MB adsorption due to their wide surface, large mesopore volume and high nitrogen content. It was also clarified that the out-gassing treatment at 400°C little influence on the pore structure but significantly changed the surface chemical properties such as oxygen functional groups and pHpzc. The kinetics and capacity of MB adsorption were controlled by both bulk structure including surface area and pore distribution and surface chemistry of the graphene layer.
