Adsorption of mercury (II) from liquid solutions using modified activated carbons

Materials Research

Hugo Soé Silva¹  Silvia Virginia Ruiz¹  Dolly Lucía Granados¹  Juan Manuel Santángelo¹ 

[1],Universidad Nacional de San Juan Facultad de Ingeniería Departamento de Ingeniería QuímicaSan Juan,Argentina

关键词: mercury;    aqueous solution;    adsorption;    activated carbon;   

DOI  :  10.1590/S1516-14392010000200003

来源: SciELO

【 摘 要 】

Mercury is one of the most toxic metals present in the environment. Adsorption has been proposed among the technologies for mercury abatement. Activated carbons are universal adsorbents which have been found to be a very effective alternative for mercury removal from water. The effectiveness with which a contaminant is adsorbed by the solid surface depends, among other factors, on the charge of the chemical species in which the contaminant is in solution and on the net charge of the adsorbent surface which depend on the pH of the adsorption system. In this work, activated carbon from carbonized eucalyptus wood was used as adsorbent. Two sulphurization treatments by impregnation with sulphuric acid and with carbon disulphide, have been carried out to improve the adsorption capacity for mercury entrapment. Batch adsorption tests at different temperatures and pH of the solution were carried out. The influence of the textural properties, surface chemistry and operation conditions on the adsorption capacity, is discussed.

【 授权许可】

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