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Removal of copper ions from aqueous solutions by a steel-making by-product
F A López1, M I Martín, C Pérez
1Department of Primary Metallurgy and Materials Recycling, National Centre for Metallurgical Research (CENIM), CSIC, Avda. Gregorio del Amo, 8, 28040 Madrid, Spain. flopez@cenim.csics.es
Abstract:
A study is made of the use of a steel-making by-product (rolling mill scale) as a material for removing Cu(2+) ions from aqueous solutions. The influence of contact time, initial copper ion concentration and temperature on removal capability is considered. The removal of Cu(2+) ions from an aqueous solution involves two processes: on the one hand, the adsorption of Cu(2+) ions on the surface of mill scale due to the iron oxides present in the latter; and on the other hand, the cementation of Cu(2+) onto metallic iron contained in the mill scale. Rolling mill scale is seen to be an effective material for the removal of copper ions from aqueous solutions.
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