Guidelines of natural zeolites characterization for acid mine drainage treatment. Case study Guayaquil, Ecuador

Buenaño Guerra, Xavier and Canoira López, Laureano and Martín Sanchez, Domingo Alfonso and Costafreda Mustelier, Jorge Luis (2015). Guidelines of natural zeolites characterization for acid mine drainage treatment. Case study Guayaquil, Ecuador. In: "Spain Minergy Congress 2015", 17-19 Junio 2015, Gijón (Asturias). pp. 1-8.

Description

Title: Guidelines of natural zeolites characterization for acid mine drainage treatment. Case study Guayaquil, Ecuador
Author/s:
  • Buenaño Guerra, Xavier
  • Canoira López, Laureano
  • Martín Sanchez, Domingo Alfonso
  • Costafreda Mustelier, Jorge Luis
Item Type: Presentation at Congress or Conference (Article)
Event Title: Spain Minergy Congress 2015
Event Dates: 17-19 Junio 2015
Event Location: Gijón (Asturias)
Title of Book: Spain minergy congress 2015
Date: 2015
Subjects:
Faculty: E.T.S.I. de Minas y Energía (UPM)
Department: Energía y Combustibles
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Zeolites constitute one of the less common groups of tectosilicates. Zeoli1es with pores between -2 to 10 A in their structures have strong sorption capacity and are widely used in industrial and municipal operations to eliminate toxic substances. One of the major environmental problems in the mining activity is the treating of acid mine drainage. In this context, it is very important to search alternatives to manage this challenge. One feasible alternative is using zeolitic tuffs. The results of the physical-chemical characterization of zeolitic tuffs are the c1ue lo continue or not with deeper analysis and tests 01 acid mine drainage treatments. The guidelines to reach this purpose are the main goal of this work. Zeolite 1uff samples (named as XB_01 and XB_02) studied in this work were laken rn the Late Cretaceous Coastal Cayo Arch Ecuador, specifically in the Guaraguao River, showing the most important characteristics of heulandite zeolitic tuffs. X-ray powder diffraction (XRD) tests were developed in order to confirm that the samples belong to the heulandite-type zeoli1ic tuffs. Additionally, Thermogravimetric analysis (TG), Inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and X-ray fluorescence (XRF) of the samples was necessary in order to define the Si/Al ratio and the main mineralogical phases. The XB_01 sample shows a higher ratio Si/Al than XB_02 sample. The cation exchange capacity est was the fundamental step to define the potentiality of the zeolite to use in acid mine drainage treatment Three methodologies were employed to determine the cation exchange capacity. The Cuban standard 626 and the ammonium exchange methodologies reflect results more consistent with each other. This is the starting point to continue with deeper studies such as breakthrough curves for heavy metal ions found in acid mine waters.

More information

Item ID: 41891
DC Identifier: http://oa.upm.es/41891/
OAI Identifier: oai:oa.upm.es:41891
Deposited by: Memoria Investigacion
Deposited on: 24 Jun 2016 09:31
Last Modified: 24 Jun 2016 09:31
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