The adsorption of heavy metals onto hydrous activated carbon |
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| Affiliation: | 1. Innovació i Recerca Industrial I Sostenible, 08860, Spain;2. Graphic Era University, Dehradun 248002, India;1. Dip. Chimica, Università degli Studi di Milano, INSTM Unit Milano-Università and ISTM-CNR, via Golgi 19, 20133 Milan, Italy;2. Dip. di Ingegneria Civile, Chimica e Ambientale, Università degli Studi di Genova and INSTM Unit Genova, P.le J.F. Kennedy 1, I-16129 Genoa, Italy;3. Dept. of Chemical Engineering, University of California at Santa Barbara, ESB 3411, Santa Barbara, CA, USA;4. Dip. di Fisica e Geologia, Università degli Studi di Perugia, Via Pascoli, 06123 Perugia, Italy;1. Graduate School of Energy Science and Technology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, South Korea;2. Korea Institute of Energy Research, 140, Yuseong-daero 1312 beon-gil, Yuseong-gu, Daejeon, 34101, South Korea;3. Department of Chemical Engineering Education, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, South Korea |
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| Abstract: | The absorption characteristics of some heavy metals, namely CU(II), Pb(II), Ni(II) and Zn(II) onto the hydrous activated carbon surface are studied. Carbon type, pH and surface loading are the most important factors affecting the extent of metal removal. The adsorption reaction can be best described by a surface complex formation model. The free metal ions, M2+, and their hydroxo species, M(OH)y2−y all participate in the absorption reaction. Specific chemical bonding, probably hydrogen bonding provided the sole energy needed for adsorption reaction. |
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