scholarly journals Acidic Aqueous Solutions and Sulfate-Rich Mineralogy: Raman Investigations of Rio Tinto, Spain, a Model for Acid Mine Drainage and a Potential Martian Analog

2008 ◽  
Author(s):  
Pablo Sobrón Sánchez
Keyword(s):  
Acid Mine Drainage ◽  
Aqueous Solutions ◽  
Mine Drainage ◽  
Acid Mine ◽  
Rio Tinto ◽  
Río Tinto

Preliminary Study of Neutralization and Inhibition of Chemolitotrophic Bacteria in an Acid Mine Drainage from Rio Tinto Site

2009 ◽  
Vol 71-73 ◽  
pp. 677-680 ◽  
Author(s):  
D. Carnicero ◽  
E. Díaz ◽  
O. Escolano ◽  
D. Rubinos ◽  
O. Ballesteros ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Red Mud ◽  
Mine Drainage ◽  
Initial Conditions ◽  
Microbial Populations ◽  
Low Grade ◽  
Neutralization Capacity ◽  
Acid Mine ◽  
Rio Tinto ◽  
Río Tinto

Limestone is commonly used for neutralization of acid mine drainage (AMD). Its main advantages are its lower price, sustained generation of alkalinity and production of low sludge volumes. Nevertheless, armouring of limestone by ferric hydroxides is a problem in oxic limestone drains and in active limestone treatment systems, reducing the efficiency of the process. Due to these disadvantages, there is a permanent search for cheaper and more effective neutralization agents. Many alkaline industrial wastes are gaining importance in the treatment of AMD. The possibilities to use two different industrial by-products, red mud from a bauxite exploitation and low grade magnesium hydroxide from a magnesite mine, as neutralizing and bacterial inhibiting agents, and the comparison with conventional limestone treatment has been studied in this paper. An AMD from Rio Tinto mine site with an initial pH of 2.4 and a ferric concentration of 1 g/L was used. Comparative test were done percolating the AMD in a continuous form with a peristaltic pump through three different columns filled with limestone, red mud and low grade magnesite, during one month and in same conditions of flow rate and amount of each compound used to fill the columns. The evolution of pH, iron and heavy metals, sulphates and microbial populations in the percolate were monitored at different times. The results showed that the best neutralization capacity was obtained with low grade magnesite during the month treatment. By contraire limestone and red mud loosed their neutralization capacity after 10 and 13 days respectively. The control of microbial populations showed that there is an inhibition of chemolithotropic bacteria as long as the materials maintain their neutralization capacity, reverting to the initial conditions when this capacity was loosed.

Mobility of Po and U-isotopes under acid mine drainage conditions: an experimental approach with samples from Río Tinto area (SW Spain)

2014 ◽  
Vol 138 ◽  
pp. 384-389 ◽  
Author(s):  
L. Barbero ◽  
M.J. Gázquez ◽  
J.P. Bolívar ◽  
M. Casas-Ruiz ◽  
A. Hierro ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Experimental Approach ◽  
Mine Drainage ◽  
Sw Spain ◽  
Acid Mine ◽  
Rio Tinto ◽  
Río Tinto

scholarly journals The Evolution of Pollutant Concentrations in a River Severely Affected by Acid Mine Drainage: Río Tinto (SW Spain)

Minerals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 598 ◽  
Author(s):  
Manuel Olías ◽  
Carlos R. Cánovas ◽  
Francisco Macías ◽  
María Dolores Basallote ◽  
José Miguel Nieto
Keyword(s):  
Acid Mine Drainage ◽  
Large Scale ◽  
Mine Drainage ◽  
Seasonal Pattern ◽  
Quality Data ◽  
Water Quality Data ◽  
Sw Spain ◽  
Acid Mine ◽  
Rio Tinto ◽  
Río Tinto

The Río Tinto, located in the Iberian Pyrite Belt (SW Spain), constitutes an extreme case of pollution by acid mine drainage. Mining in the area dates back to the Copper Age, although large-scale mining of massive sulfide deposits did not start until the second half of the 19th century. Due to acidic mining discharges, the Río Tinto usually maintains a pH close to 2.5 and high concentrations of pollutants along its course. From a detailed sampling during the hydrological year 2017/18, it was observed that most pollutants followed a similar seasonal pattern, with maximum concentrations during autumn due to the washout of secondary soluble sulfate salts and minimum values during large flood events. Nevertheless, As and Pb showed different behavior, with delayed concentration peaks. The dissolved pollutant load throughout the monitored year reached 5000 tons of Fe, 2600 tons of Al, 680 tons of Zn, and so on. While most elements were transported almost exclusively in the dissolved phase, Fe, Pb, Cr, and, above all, As showed high values associated with particulate matter. River water quality data from 1969 to 2019 showed a sharp worsening in 2000, immediately after the mine closure. From 2001 on, an improvement was observed.

Removal of Zinc Ions from Acid Aqueous Solutions and Acid Mine Drainage Using Zeolite-Bearing Tuff

2018 ◽  
Vol 38 (1) ◽  
pp. 187-196 ◽  
Author(s):  
Afrodita Zendelska ◽  
Mirjana Golomeova ◽  
Blagoj Golomeov ◽  
Boris Krstev
Keyword(s):  
Acid Mine Drainage ◽  
Aqueous Solutions ◽  
Mine Drainage ◽  
Zinc Ions ◽  
Acid Mine

Adsorption of Arsenic from Aqueous Solutions by Iron Oxide Coated Sand Fabricated with Acid Mine Drainage

2015 ◽  
Vol 50 (2) ◽  
pp. 267-275 ◽  
Author(s):  
Jung-Seok Yang ◽  
Man Jae Kwon ◽  
Young-Tae Park ◽  
Jaeyoung Choi
Keyword(s):  
Iron Oxide ◽  
Acid Mine Drainage ◽  
Aqueous Solutions ◽  
Mine Drainage ◽  
Acid Mine ◽  
Coated Sand
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