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Removal of radionuclides from acid mine waters by retention on adsorbing materials |
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| Authors: | M. R. L. Nascimento H. T. Fukuma W. C. da Costa A. L. Quinelato O. Garcia Jr. H. A. Gomes |
| Affiliation: | 29601. Comiss?o Nacional de Energia Nuclear, Laboratório de Po?os de Caldas, CNEN/COLAB, 37701-970 Po?os de Caldas, Brazil 29602. Comiss?o Nacional de Energia Nuclear, Laboratório de Po?os de Caldas, CNEN/COLAB, 37701-970 Po?os de Caldas, Brazil 29603. Comiss?o Nacional de Energia Nuclear, Laboratório de Po?os de Caldas, CNEN/COLAB, 37701-970 Po?os de Caldas, Brazil 29604. Comiss?o Nacional de Energia Nuclear, Laboratório de Po?os de Caldas, CNEN/COLAB, 37701-970 Po?os de Caldas, Brazil 29605. Departamento de Bioquímica e Tecnologia Química, Instituto de Química, Universidade Estadual Paulista, 14801-970 Araraquara, Brazil 29606. Comiss?o Nacional de Energia Nuclear, Laboratório de Po?os de Caldas, CNEN/COLAB, 37701-970 Po?os de Caldas, Brazil |
| Abstract: | Summary This study proposes a method for decontamination of acid drainage water from a uranium mine, as an alternative process to lime treatment. The research embodied the recovery of uranium with an ion-exchange resin, treatment of effluent resin with lime, or with inorganic adsorbents and biosorbents. The uranium decontamination level using the resin process was 94% and allowed the recovery of this element as a commercial product. Among the inorganic adsorbents studied, phosphogypsum was effective for 226Ra, 228Ra, and 210Pb removal. Among the biosorbents, Sargassum sp.was superior in relation to its specific capacity to accumulate and remove 226Ra. |
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