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Adsorption of heavy metals from aqueous solutions with by‐products of the steelmaking industry
Author(s) -
Martín M Isabel,
López Félix A,
Pérez Carlos,
LópezDelgado Aurora,
Alguacil Francisco J
Publication year - 2005
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.1305
Subject(s) - adsorption , steelmaking , aqueous solution , desorption , chemistry , blast furnace , ionic strength , effluent , langmuir , chemical engineering , metallurgy , materials science , inorganic chemistry , environmental engineering , environmental science , organic chemistry , engineering
This paper describes the use of two steelmaking industry by‐products (rolling mill scale and blast furnace sludge) as adsorbents for removing heavy metals from aqueous effluent solutions. The adsorption of Pb 2+ , Zn 2+ and Cd 2+ on these materials has been studied by the determination of adsorption isotherms from solutions of controlled ionic strength. The effect of time, equilibrium temperature and metal solution concentration on adsorption efficiency was evaluated. The adsorption processes are analysed using the Langmuir theory. Desorption and dumping processes for the metals from loaded steelmaking industry by‐products were also studied under different experimental conditions. The by‐products were shown to be effective adsorbents for the studied cations in aqueous solutions within the range of working concentrations. Copyright © 2005 Society of Chemical Industry