Removal of cyanide in aqueous solution by oxidation with hydrogen peroxide in presence of activated carbon prepared from olive stones |
| |
| Authors: | Ahmed Reda Yeddou Boubakeur Nadjemi Farid Halet Aïssa Ould-Dris Richard Capart |
| |
| Affiliation: | 1. Laboratoire d’Etude et de Développement des techniques de traitement et d’épuration des eaux et de gestion environnementale. Ecole Normale Supérieure Kouba, BP 92 Vieux Kouba, Alger 16050, Algeria;2. Département de Génie de l’Environnement, LTA Université de Boumerdes, Algeria;3. Laboratoire de Transformations Intégrées de la Matière Renouvelable, EA 4297, Université de Technologie de Compiègne, Centre de Recherche de Royallieu, BP 20529, 60200 Compiegne Cedex, France;1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China;2. Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China;3. College of Urban Construction, Nanjing Tech University, Nanjing 211800, PR China;4. Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, OH 45221-0071, USA;1. Department of Earth and Environmental Sciences and Research Institute of Natural Science (RINS), Gyeongsang National University, Jinju 660-701, Republic of Korea;2. Department of Information and Statistics and Research Institute of Natural Science (RINS), Gyeongsang National University, Jinju 660-701, Republic of Korea;3. School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea;4. Department of Earth and Environmental Sciences and KU-KIST Green School (Graduate School of Energy and Environment), Korea University, Seoul 136-701, Republic of Korea;1. Department of Chemical Engineering, University of Ilorin, Ilorin, Nigeria;2. Department of Chemical Engineering, Ahmadu Bello University, Zaria, Nigeria;3. Department of Chemical Engineering, Ladoke Akintola University of Technology, Ogbomoso, Nigeria;4. On sabbatical at Department of Chemical and Petroleum Engineering, College of Engineering, Afe Babalola University, Ado-Ekiti, Ekiti State, Nigeria |
| |
| Abstract: | This work is dedicated to the removal of the very toxic free cyanide from aqueous solution by oxidation with hydrogen peroxide H2O2 in the presence of activated carbon prepared from olive stones. Effects of the initial molar ratio H2O2]0/CN?]0, the initial cyanide concentration, the activated carbon concentration and the temperature on cyanide removal have been examined. The removal of free cyanide in absence of activated carbon showed very slow kinetics. The presence of activated carbon has increased the reaction rate showing thus a catalytic activity. The kinetics of cyanide removal has been found to be of pseudo-first-order with respect to cyanide and the rate constants have been determined for different values of the aforementioned parameters. The apparent activation energy has been determined from tests carried out at three different temperatures. It was found equal to 46.2 kJ/mol in the presence of activated carbon, which is about half of the 82.7 kJ/mol found for the oxidation in absence of the activated carbon.This process can be interesting for the cyanide removal from processed solutions because it does not use soluble metal catalyst and it consumes only hydrogen peroxide as chemical product. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
