Mineral control of arsenic content in thermal waters from volcano-hosted hydrothermal systems: Insights from island of Ischia and Phlegrean Fields (Campanian Volcanic Province, Italy)

Aiuppa, Alessandro; Avino, R.; Brusca, L.; Caliro, Stefano; Chiodini, Giovanni; D’Alessandro, W.; Favara, Rocco; Federico, C.; Ginevra, W.; Inguaggiato, Salvatore; Longo, Manfredi; Pecoraino, Giovannella; Valenza, M.

doi:10.1016/j.chemgeo.2005.11.004

Cited by 126 publications

(92 citation statements)

References 45 publications

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“…Inspection of the figure reveals that the lake waters deviate slightly from a pure meteoric composition (Air Saturated Waters, ASW) toward a composition similar to that of hydrothermal gases discharged in the Campi Flegrei (Solfatara fumaroles; Caliro et al, 2007). This behavior is similar to that shown by the Campi Flegrei waters, where an input of hydrothermal fluids has been recognized (Aiuppa et al, 2006). However, Total Dissolved Inorganic Carbon (TDIC), CH 4 and N 2 relative molar concentration reported in the ternary diagram of Figure 10 show a marked trend between an ASW mixed with a hydrothermal component, and a CH 4 -rich composition.…”

Section: Dissolved Gasessupporting

confidence: 57%

“…Relative concentrations of dissolved SO 4 , Cl and HCO 3 in lake waters are compared with the compositions of local groundwaters (Valentino et al, 1999;Stanzione, 2003, 2004;Caliro 2004;Aiuppa et al, 2006), showing the existence of three main water types in the area ( Chloride-rich groundwaters, having chloride as the prevalent anion species and sodium as the main dissolved cation, suggesting the existence of a Na-Cl brine component recharging the shallow aquifer (Aiuppa et al, 2006), with a composition similar to that of thermal brines encountered at depth in drillings within the geothermal reservoir (Guglielminetti, 1986); The chemical composition of the Averno waters appears similar to that of the groundwaters present in the area and in particular suggests an origin by mixing of HCO 3 -shallow waters and a Na-Cl thermal component (Fig. 11).…”

Section: Chemical and Isotopic Composition Of Watersmentioning

confidence: 99%

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Geochemical and biochemical evidence of lake overturn and fish kill at Lake Averno, Italy

Caliro

Chiodini

Izzo

et al. 2008

Journal of Volcanology and Geothermal Research

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Section: Dissolved Gasessupporting

confidence: 57%

Section: Chemical and Isotopic Composition Of Watersmentioning

confidence: 99%

Geochemical and biochemical evidence of lake overturn and fish kill at Lake Averno, Italy

Caliro

Chiodini

Izzo

et al. 2008

Journal of Volcanology and Geothermal Research

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“…The pHs are slightly acid to near-neutral (6.42-7.39), and the waters have high concentrations of Na, Li, B, HCO 3 , Cl, F and SiO 2 , which are typical of spring waters in geothermal areas (Hem, 1985;Aiuppa et al, 2006). The three groups of spring waters (SPR1-6, near the town of San Antonio; SPR7, the town's drinking water source and SPR8-12 at Baños de Agua Caliente) have distinct major and trace element compositions (Table 1, Figure 2).…”

Section: Characteristics Of Spring Watersmentioning

confidence: 99%

Geochemistry of As-, F- and B-bearing waters in and around San Antonio de los Cobres, Argentina, and implications for drinking and irrigation water quality

Hudson‐Edwards¹,

Archer²

2012

Journal of Geochemical Exploration

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Spring, stream and tap waters from in and around San Antonio de los Cobres, Salta, Argentina, were sampled to characterize their geochemical signatures, and to determine whether they pose a threat to human health and crops. The spring waters are typical of geothermal areas world-wide, in that they are Na-Cl waters with high concentrations of As tot , As(III), Li, B, HCO 3 , F and SiO 2 (up to 9. 49, 8.92, 13.1, 56.6, 1250, 7.30 and 57.2 mg L -1 , respectively), and result from mixing of deep Na-Cl brines and meteoric HCO 3 -rich waters. Springs close to the town of San Antonio have higher concentrations of all elements, and are generally cooler, than springs in the Baños de Agua Caliente. Spring water chemistry is a result of mixing of deep Na-Cl brines and meteoric HCO 3 waters. Stream waters are also Na-Cl type, and receive large inputs of all elements from the springs near San Antonio, but concentrations decrease downstream through the town of San Antonio due to mineral precipitation. The spring that is used as a drinking water source, and other springs in the area, have As, F and B concentrations in excess of WHO and Argentinian drinking water guidelines. Evaluation of the waters for irrigation purposes suggests that their high salinities and B concentrations may adversely affect crops. The waters may be improved for drinking and irrigation by dilution with cleaner meteoric waters, mineral 2 precipitation or by use of commercial filters. Such recommendations could also be followed by other settlements that draw drinking and irrigation waters from geothermal sources.

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“…Hydrothermally altered rocks have been extensively studied but mostly in the context of ore formation and characterization (Aiuppa et al, 2006;Allen and Hahn, 1994;Halbach et al, 1993;Horton et al, 2001;Huston et al, 1995;Ostwald 3 and England, 1977). In addition, several authors have examined the geochemistry of toxic elements, such as As and some heavy metals, in contact with hydrothermally altered rocks at mine pit lakes (Davis and Ashenberg, 1989;Davis et al, 2006;Eary, 1998;Levy et al, 1997;Savage et al, 2009;Tempel et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Mobilization and speciation of arsenic from hydrothermally altered rock containing calcite and pyrite under anoxic conditions

Tabelin

Igarashi

Yoneda

2012

Applied Geochemistry

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The effects of water residence time and anoxic conditions on the mobilization and speciation of arsenic (As) in a calcite-and pyrite-bearing altered rock excavated during a road-tunnel project has been evaluated using batch and column laboratory experiments. Higher infiltration rates (i.e., shorter water residence times) enhanced the leaching of As due to the higher pH values of the effluents and more rapid transport of dissolved As through the columns. The concentration of As in the effluent also increased under anoxic conditions regardless of the water residence time.This enhanced leaching of As under anoxic conditions could be attributed to a significant pH increase and decreased Fe oxyhydroxides/oxides precipitation compared to similar experiments done under ambient conditions. Processes that controlled the evolution of pH and the temporal release mechanisms of As under anoxic conditions were identical to those previously observed under ambient conditions: the dissolution of soluble phases, pyrite oxidation, co-precipitation and/or adsorption/desorption reactions. Speciation of As in the column experiments could partly be attributed to the pH-dependent adsorption of As species onto Fe oxyhydroxides/oxides precipitates. Moreover, apparent equilibriums of the total As and arsenite (As[III]) concentrations were delayed under anoxic conditions in both batch and column experiments.

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Mineral control of arsenic content in thermal waters from volcano-hosted hydrothermal systems: Insights from island of Ischia and Phlegrean Fields (Campanian Volcanic Province, Italy)

Cited by 126 publications

References 45 publications

Geochemical and biochemical evidence of lake overturn and fish kill at Lake Averno, Italy

Geochemical and biochemical evidence of lake overturn and fish kill at Lake Averno, Italy

Geochemistry of As-, F- and B-bearing waters in and around San Antonio de los Cobres, Argentina, and implications for drinking and irrigation water quality

Mobilization and speciation of arsenic from hydrothermally altered rock containing calcite and pyrite under anoxic conditions

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