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Título del libro: High Performance Computing And Applications
Título del capítulo: Removal of arsenic from acid mine drainage by indigenous limestones

Autores UNAM:
MARIA AURORA ARMIENTA HERNANDEZ; OLIVIA CRUZ RONQUILLO; ALEJANDRA AGUAYO RIOS; NORA ELIA CENICEROS BOMBELA;
Autores externos:

Idioma:
Inglés
Año de publicación:
2016
Palabras clave:

Drainage; Heavy metals; Limestone; Sustainable development; Acid mine drainage; Column experiments; Iron oxyhydroxides; Oxidation conditions; Oxidation degree; Physico - chemical parameters; Removal mechanism; Removal of arsenics; Arsenic


Resumen:

This study was carried out with the aim of evaluating the use of indigenous limestones in an open system channel to retain As from acid mine drainage. To achieve this goal, limestones were collected at the historical mining zone of Zimapán, México. Batch and column experiments were performed with synthetic leachates obtained from two tailing ponds with different oxidation degrees. Results of mineralogi-cal (XRD, FTIR-ATR and SEM-EDS), physico-chemical parameters, arsenic and heavy metals concentra-tions were interpreted to determine removal mechanisms. Formation and sorption on iron oxyhydroxides and on calcite, and probably arsenates precipitation were identified as the main processes influencing As retention. Relevance of oxidation conditions is highlighted for an adequate operation of the system. © 2016 Taylor & Francis Group, London.


Entidades citadas de la UNAM: