Abstract

VENA Q, Gabriela et al. Biosorption of heavy metal cd (ii) for the treatment of mining effluents through sodium alginate  . Rev. Bol. Quim [online]. 2019, vol.36, n.4, pp.148-156. ISSN 0250-5460.

Abstract In this experimental and analytical work, the adsorption of Cd (II) in effluents from the mining sector in Arequipa, Peru was investigated. The mining effluents were monitored, then the characterization of the effluent relative to the amount of Cd (II) was performed, resulting in 10 ppm. Then the treatment of Cd (II) solutions of mining effluent was carried out with the sodium alginate that acted as a biosorbent of the Cd (II) and contact time between the two phases: liquid and solid in a batch system. Eleven tests were done using the 2K experimental design in the batch system. This method allows the treatment of mining effluents, in a quick way, of how to mitigate the effluent and lower pollution levels so that they can be reused at the plant level and not contaminate the environment. Sodium alginate has a maximum monolayer biosorption capacity of 0.0735 mg/g. It was possible to remove 91.88% of the Cd (II) contained in the mining effluents. In the treatments of the Cd (II) solutions by means of the batch system, 0.010 ppm was obtained, acceptable value according to norms for mining reuse and for waters that can be treated with advanced treatment.

Keywords : Biosorbent; Cadmium; Mining effluents; Sodium alginate.

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