Geochemical characterization of the ground waters from the former Hg-mining area of Abbadia San Salvatore (Mt. Amiata, central Italy): criticalities and perspectives for the reclamation process

2015 ◽  
Vol 134 (2) ◽  
pp. 304-322 ◽  
Author(s):  
Orlando Vaselli ◽  
Barbara Nisi ◽  
Daniele Rappuoli ◽  
Francesco Bianchi ◽  
Jacopo Cabassi ◽  
...  
Keyword(s):  
Central Italy ◽  
Mining Area ◽  
Geochemical Characterization ◽  
Ground Waters ◽  
Hg Mining ◽  
Reclamation Process

Geochemical characteristics and water pollution by Potentially Toxic Elements at the Varatec creek, Baiut mining area, Romania.

2021 ◽  
Author(s):  
Diego Santanna ◽  
Ampurire Aryampa ◽  
Gyozo Jordan ◽  
Damian Gheorghe ◽  
Csaba Szabo
Keyword(s):  
Distribution Patterns ◽  
Mining Area ◽  
Element Distribution ◽  
Geochemical Background ◽  
Dissolved Metals ◽  
Geochemical Characterization ◽  
Ph Values ◽  
High Sulfate ◽  
Gt Element

<p>This study provides an identification and evaluation of the Potentially Toxic Element (PTE) (Co, Cu, Cd, Pb, Zn, and Ni) sources, speciation, mobility, distribution patterns, enrichment, and relationships along the Varatic Creek and its tributaries in the Baiut Mining Area, Romania. ICP-OES trace element concentrations were measured in collected samples. The geochemical characterization of the Varatec Creek revealed that the water contains high dissolved metals, high sulfate concentrations, and low pH values, dominated by Ca<sup>+2</sup> and SO₄<sup>2-</sup> cation and anion in streamwater.</p><p>The calculated median concentrations were much higher than  the average surface water concentrations in Europe (FOREGS) and decreased in the order of Zn(126.2μg.l<sup>-1</sup>)>>Cu(3.4μg.l<sup>-1</sup>)>Ni(1.6μg.l<sup>-1</sup>)=Cd(1.6μg.l<sup>-1</sup>)>Co(0.5μg.l<sup>-1</sup>)>Pb(0.3μg.l<sup>-1</sup>). The relative variability (MAD/median) follow the order Cd(90%)>Co(80%)=Zn(80%)>Cu(60%)=Ni(60%)>Pb(50%). The regional enrichment factor calculated as the Median/FOREGS<sub>(European level)</sub> follow the order Cd(156)>>Zn(47)>>Cu(3.8)>Pb(3)=Co(3)>Ni(0.9).</p><p>Element distribution, geochemical behavior and source, aqueous speciation modeling, and correlation analysis were performed to estimate the metal sorption to Fe-oxyhydroxide, Mn-oxyhydroxide, and sulfates. Detailed data analysis, reaction modelling and geochemical interpretation revealed two distinct groups of PTEs in the studied mining-impacted streamwater: Ni and Co seem to be associated with the geochemical background, while Cd, Pb, Zn, and Cu are originating from mining activities.</p>

The hydro geochemical characterization of ground waters in Tunisian Chott’s region.

2007 ◽  
Vol 54 (4) ◽  
pp. 843-854 ◽  
Author(s):  
Samir Kamel ◽  
Hamed Younes ◽  
Najiba Chkir ◽  
Kamel Zouari
Keyword(s):  
Geochemical Characterization ◽  
Ground Waters

scholarly journals Preliminary geochemical characterization of the Mts. Simbruini karst aquifer (Central Italy)

2021 ◽  
Vol 64 (Vol. 64 (2021)) ◽  
Author(s):  
Massimo Ranaldi ◽  
Marianna Cangemi ◽  
Maria Luisa Carapezza ◽  
Marco Vinci ◽  
Paolo Madonia
Keyword(s):  
Karst Aquifer ◽  
Central Italy ◽  
Total Alkalinity ◽  
Geochemical Characterization ◽  
Isotopic Signatures ◽  
Groundwater Samples ◽  
Colli Albani ◽  
Shallow Wells ◽  
Atomic Adsorption Spectroscopy

Mts. Simbruini karst aquifer feeds important springs whose capture contributes to the water supply of Rome City. To improve the geochemical characterization of this aquifer, we analyzed 36 groundwater samples, 29 from springs and 7 from shallow wells, collected in 1996 and 2019. Atomic adsorption spectroscopy, tritration, ionic chromatography and mass spectrometry were the used analytical methods. Ground waters are bicarbonate alkaline-earth type and HCO3 dominance confirms that the aquifer is hosted in carbonate rocks. Total alkalinity vs. cations plot indicates that CO2 driven weathering controls the water chemistry. The probability plots of HCO3, cations and Ca2+ +Mg2+ indicate four groundwater populations with the less represented one (9 samples) characterized by the highest PCO2 values (>0.3 atm). Most anomalous values of the dissolved PCO2 are from springs located near the center of the studied area. Four samples have negative values of d13CCO2 (about -22‰ vs. PDB), indicating its organic origin, but two other samples have positive values (1.6 and 2.6 ‰ vs. PDB), similar to those observed in the CO2 of deep origin discharged at the close Colli Albani volcano. Therefore, geochemical evidence indicates that the Mts. Simbruini aquifer is locally affected by the input of deep originated CO2, likely rising up along fractures, interacting with a recharge of meteoric origin, as evidenced by its d2H and d18O isotopic signatures.

scholarly journals Gaseous Elemental Mercury and Total and Leached Mercury in Building Materials from the Former Hg-Mining Area of Abbadia San Salvatore (Central Italy)

2017 ◽  
Author(s):  
Orlando Vaselli ◽  
Barbara Nisi ◽  
Daniele Rappuoli ◽  
Jacopo Cabassi ◽  
Franco Tassi
Keyword(s):  
Building Materials ◽  
Central Italy ◽  
Elemental Mercury ◽  
Mining Area ◽  
Wood Structures ◽  
Gaseous Elemental Mercury ◽  
Global Concern ◽  
Mining Complex ◽  
Anthropogenic Processes ◽  
Hg Mining

Mercury has a strong environmental impact since both its organic and inorganic forms are toxic and it represents a pollutant of global concern. Liquid Hg is highly volatile and it can be released during natural and anthropogenic processes in the hydrosphere, biosphere and atmosphere. In this study the distribution of Gaseous Elemental Mercury (GEM) and the total and leached mercury concentrations on paints, plasters, roof tiles, concretes, metals, dust and wood structures were determined in the main buildings and structures of the former Hg-mining area of Abbadia San Salvatore (Siena, Central Italy). The mining complex (divided into 7 units) covers a surface of about 65 ha and contains mining structures and managers and workers buildings. In this work, nine surveys of GEM measurements were carried out from July 2011 to August 2015 for the buildings and structures located in the units 2, 3 and 6. Moreover, detailed measurements were performed in February, April, July, September and December 2016 in the edifices and mining structures of Unit 6. GEM concentrations showed a strong variability in terms of space and time mostly depending on the distance from the building hosting driers, furnaces and condensers and ambient temperature, respectively. In the Unit 2 surveys carried out in the hotter period (from June to September) showed GEM concentrations up to 27,500 ng m−3, while in the Unit 6 they were on average much higher and occasionally they saturated the GEM measurement device (>50,000 ng m−3). Concentrations of total (in mg kg−1) and leached (in μg L−1) mercury measured in different building materials (up to 46,580 mg kg−1 and 4,470 mg L−1 for total and leached mercury, respectively) showed for the same type of material highly variable values in dependence on the edifice or mining structure from which they were collected. The results obtained in this study are of relevant interest for the operational cleanings to be carried out during the reclamation activities.

scholarly journals Discontinuous Geochemical Monitoring of the Galleria Italia Circumneutral Waters (Former Hg-Mining Area of Abbadia San Salvatore, Tuscany, Central Italy) Feeding the Fosso Della Chiusa Creek

Environments ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 15
Author(s):  
Orlando Vaselli ◽  
Marta Lazzaroni ◽  
Barbara Nisi ◽  
Jacopo Cabassi ◽  
Franco Tassi ◽  
...  
Keyword(s):  
Trace Elements ◽  
Central Italy ◽  
Mining Area ◽  
Geochemical Monitoring ◽  
Mean Flow ◽  
Congruent Dissolution ◽  
Tiber Basin ◽  
Tunnel System ◽  
Dissolved Mercury ◽  
Hg Mining

The Galleria Italia waters drain the complex tunnel system of the former Hg-mining area of Abbadia San Salvatore (Tuscany, central Italia) and feed the 2.5 km-long Fosso della Chiusa creek. The mining exploitation was active for more than one century and more than 100,000 tons of liquid mercury were produced by roasting processes of cinnabar (HgS). In this work, a discontinuous geochemical monitoring of the Galleria Italia circumneutral waters was carried out from February 2009 to October 2020, during which the main physicochemical parameters, main and minor dissolved species and trace elements (including Hg) were determined. In the observation period, significant variations in the water chemistry were recorded, particularly when flooding waves, due to intense precipitations, occurred, with the two main events being recorded in February 2009 and January 2010. The chemical composition of the Galleria Italia waters was Ca(Mg)-SO4 and related to congruent dissolution of gypsum/anhydrite at which a contribution from carbonatic and silicatic minerals and partial solubilization of CO2 and and H2S oxidation is to be added. Regarding the trace elements, Al, Mn and Fe were up to 1500, 768 and 39520 μg L−1, with these elements also showing high contents in the sediment precipitating by the Galleria Italia waters. In most cases, dissolved mercury was below the instrumental detection limit (<0.1 μg L−1), although occasionally it reached >1 μg L−1. Considering a mean flow rate of 40 L s−1 of the discharged water, the amount of dissolved mercury released from Galleria Italia was computed, although most mercury was occurring in the sediment (1.2 mg kg−1). A more realistic computation of mercury released from Galleria Italia should involve a sampling network along the Fosso della Chiusa before entering the riverine system of the Tiber basin, into which dissolved and suspended mercury are to be determined along with that occurring in the sediments.

HIGH ENERGY SYNCHROTRON X-RAY MICROSPECTROSCOPY FOR GEOCHEMICAL CHARACTERIZATION OF TERRESTRIAL AND EXTRATERRESTRIAL SAMPLES

2016 ◽  
Author(s):  
Antonio Lanzirotti ◽  
◽  
Stephen R. Sutton ◽  
Matt Newville ◽  
Jeffrey P. Fitts ◽  
...  
Keyword(s):  
High Energy ◽  
Geochemical Characterization ◽  
X Ray
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