TY - JOUR
T1 - Simplified fixed bed design models for the adsorption of acid dyes on novel pine cone derived activated carbon
AU - Hadi, Mahdi
AU - Samarghandi, Mohammad Reza
AU - McKay, Gordon
PY - 2011/6
Y1 - 2011/6
N2 - A novel activated carbon has been prepared by the activation of ground pine cones using phosphoric acid activation, and the nitrogen Brunauer-Emmett-Teller surface area was 869 m2 g-1. Equilibrium isotherms were performed to assess the capacity of the activated carbon using two acidic dyes, namely Acid Blue 113 and Acid Black 1. The monolayer equilibrium isotherm capacities of Acid Blue 113 and Acid Black 1 were 286 and 458 mg dye/g C, respectively. These capacities are significantly higher than commercial carbons and other literature carbons. For the first time, these carbons were tested in fixed bed experimental systems and data analysed using the bed depth service time model (BDST) and the carbon usage rate (CUR) model. In the fixed bed studies, the key parameters for a 20-cm bed depth for the BDST model at 50% breakthrough capacity are (a) for Acid Black, the BDST capacity is 149 mg dye/g carbon and operating time is 1,530 min and (b) for Acid Blue, the breakthrough capacity is 9 mg of dye/g of carbon and operating time is 195 min. The fixed bed study indicates that the BDST design models can be applied satisfactorily, and the pine cone carbon has significant potential but a more mesoporous pine cone carbon is preferable for the larger Acid Black dye. The CUR design method was not successful.
AB - A novel activated carbon has been prepared by the activation of ground pine cones using phosphoric acid activation, and the nitrogen Brunauer-Emmett-Teller surface area was 869 m2 g-1. Equilibrium isotherms were performed to assess the capacity of the activated carbon using two acidic dyes, namely Acid Blue 113 and Acid Black 1. The monolayer equilibrium isotherm capacities of Acid Blue 113 and Acid Black 1 were 286 and 458 mg dye/g C, respectively. These capacities are significantly higher than commercial carbons and other literature carbons. For the first time, these carbons were tested in fixed bed experimental systems and data analysed using the bed depth service time model (BDST) and the carbon usage rate (CUR) model. In the fixed bed studies, the key parameters for a 20-cm bed depth for the BDST model at 50% breakthrough capacity are (a) for Acid Black, the BDST capacity is 149 mg dye/g carbon and operating time is 1,530 min and (b) for Acid Blue, the breakthrough capacity is 9 mg of dye/g of carbon and operating time is 195 min. The fixed bed study indicates that the BDST design models can be applied satisfactorily, and the pine cone carbon has significant potential but a more mesoporous pine cone carbon is preferable for the larger Acid Black dye. The CUR design method was not successful.
KW - Acid dyes
KW - Activated carbon
KW - Equilibrium
KW - Fixed bed design
KW - Pine cones
UR - http://www.scopus.com/inward/record.url?scp=80053571511&partnerID=8YFLogxK
U2 - 10.1007/s11270-010-0635-2
DO - 10.1007/s11270-010-0635-2
M3 - Article
AN - SCOPUS:80053571511
SN - 0049-6979
VL - 218
SP - 197
EP - 212
JO - Water, Air, and Soil Pollution
JF - Water, Air, and Soil Pollution
IS - 1-4
ER -