Franco Tassi

Franco Tassi
University of Florence | UNIFI · Dipartimento di Scienze della Terra

Bachelor of Applied Science

About

564
Publications
129,912
Reads
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6,178
Citations
Citations since 2016
168 Research Items
3646 Citations
20162017201820192020202120220100200300400500600
20162017201820192020202120220100200300400500600
20162017201820192020202120220100200300400500600
20162017201820192020202120220100200300400500600
Additional affiliations
September 2012 - present
University of Florence
Position
  • Fluid Geochemistry
Education
September 1984 - July 2004
University of Florence
Field of study
  • Earth Sciences

Publications

Publications (564)
Article
This paper presents new chemical and isotopic data on gases from deep oil and gas fields, bubbling gases, dissolved gases in groundwaters and dry seeps of the Southern Po River Basin (Emilia-Romagna, Italy), aiming to (i) characterize and differentiate the various types of deep natural gases; (ii) identify the source(s) of methane and light hydroca...
Article
Full-text available
The chemical composition of gases emitted by active volcanoes reflects both magma degassing and shallower processes, such as fluid-rock hydrothermal interaction and mixing with atmospheric-derived fluids. Untangling the magmatic fluid endmember within surface gas emission is therefore challenging, even with the use of well-known magma degassing tra...
Article
Although terrestrial hydrothermal systems are considered among the most fascinating environments, how their unique and extreme conditions can affect microorganisms selection and the role in biogeochemical cycles has not yet been well elucidated. A combined geochemical and microbiological exploration in waters and sediments from ten sampling points...
Article
Full-text available
This study focuses on the geochemical features of the presently discharging thermal and cold springs and on paleofluids from the upstream portion of the Reno river basin (Alto Reno; central–northern Italy). The aim is investigating the primary sources of the modern and fossil fluids and the interactions between deep and shallow aquifers. Paleofluid...
Conference Paper
Full-text available
Wetlands are among the main natural sources of CH 4 emissions to the atmosphere. Neverthe less, large uncertainties still affect the estimates of their overall contribution at both local and global scales due to several knowledge gaps on how environmental drivers shape CH 4 emissions from these delicate ecosystems. In this work, we present CH 4 dif...
Conference Paper
Full-text available
The Mugello Basin (MB) is an intermountain Pleistocene basin located 30 km north of Florence (Tuscany, Central Italy), which shows high seismicity with few events being characterized by Mw≥6.0, e.g. the June 29, 1919 Vicchio earthquake (Mw=6.2) that caused almost 100 fatalities and more than 400 injuries. The aim of this study was to characterize t...
Conference Paper
Full-text available
Wetlands are well-known as significant sources of CH4 to the atmosphere, whereas lakes are commonly considered as sinks for C-bearing volatiles produced within bottom sediments. In this work, we present the results of two surveys (summer 2020 and winter 2021, respectively) carried out at the 300×200 m wide Lake Astroni (Phlegraean Fields, southern...
Article
Full-text available
The chemical composition of volatile organic compounds (VOCs) in landfill gas from municipal waste (MW) landfills primarily depends on the type of degrading waste. To provide first insights into the relationship between VOC chemistry (in landfill gas) and specific waste components, a lab-scale experiment on anaerobic digestion (AD) of green waste (...
Article
Volcanoes are currently to be regarded as natural sources of air pollutants. Climatic and environmental forcing of large volcanic eruptions are well known, although gases emitted through passive degassing during periods of quiescence or hydrothermal activity can also be highly dangerous for the environment and public health. Based on compositional...
Article
The Argentinean Andean region hosts a vast geothermal resource clustered by active magmatic and tectonic activity. One of the most studied geothermal areas is the Tuzgle-Tocomar geothermal system in Central Puna (NW Argentina). However, despite the existence of several studies since the 1970′s highlighting the geothermal potential of the area, only...
Article
Full-text available
Wetlands are hotspots of CH4 emissions to the atmosphere, mainly sustained by microbial decomposition of organic matter in anoxic sediments. Several knowledge gaps exist on how environmental drivers shape CH4 emissions from these ecosystems, posing challenges in upscaling efforts to estimate global emissions from waterbodies. In this work, CH4 and...
Article
Red wood ants are ecologically important species in Europe that form large colonies. Their nest mounds are characterized by stable microclimatic conditions, that are favourable to the development of rich invertebrate and microbial communities. Through their respiration processes, all these inhabitants contribute to the total gas emissions of the mo...
Article
Full-text available
In the framework of the industry of secondary aluminum, the chemical neutralization of highly reactive materials that come from the pre-treatment screening processes of scraps (beverage cans and domestic appliances) was investigated through experiments in aqueous alkaline solutions. Metallic aluminum-rich by-products are classified, according to EU...
Research
Biogas flux, VOCs, landfill cover soil, Municipal solid waste
Article
Sicily hosts many natural manifestations that include thermal waters, gas discharges and mud volcanoes. Due to the significant geodynamic and geological differences, the fluid discharges along a NE-WS–oriented transect that run from the Peloritani Mts. to the Sciacca Plain shows a large variability in water and gas chemical and isotopic composition...
Article
From February to April 2019, near-surface CO2 and CH4 concentrations and carbon isotopic compositions (δ¹³C-CO2 and δ¹³C-CH4) were monitored at four stations belonging to the local air quality surveillance network of Florence (central Italy), representing typical zones of suburban background (SB), urban traffic (UT) and urban background (UB). The G...
Article
Full-text available
The contribution of oxic methane production to greenhouse gas emissions from lakes is globally relevant, yet uncertainties remain about the levels up to which methanogenesis can counterbalance methanotrophy by leading to CH4 oversaturation in productive surface waters. Here, we explored the biogeochemical and microbial community variation patterns...
Article
The outbreak of COVID-19 pandemic was accompanied by global mobility restrictions and slowdown in manufacturing activities. Accordingly, cities experienced a significant decrease of CO2 emissions. In this study, continuous measurements of CO2 fluxes, atmospheric CO2 concentrations and δ13C-CO2 values were performed in the historical center of Flore...
Article
Diffuse soil fluxes of gaseous elemental mercury (GEM) were measured in a hydrothermal area (20,000 m2) located inside “Le Biancane” natural park, north of Monterotondo Marittimo village (Larderello-Travale geothermal field, Central Italy), using a static closed chamber (SCC) coupled with a Lumex® RA-915M portable analyzer. At 89 sites, GEM and CO2...
Conference Paper
The former Hg-mining area of Abbadia San Salvatore (Siena, Tuscany, central Italy), was one the most important districts of Hg production worldwide, whose activity was closed at the end of the seventies. The exploited ore had a mercury content of 0.6 to 2.0 wt.% and was extracted down to the depth of 400 m. It has been estimated that 103,000 tons o...
Conference Paper
The former mercury mining district at the foothill of the 200-300,000 years old volcanic complex of Mt. Amiata (Tuscany, central Italy) were one of the most important mines worldwide and the mining site of Abbadia San Salvatore (ASS) was the core of the exploitation of cinnabar and the production of liquid mercury. It also represented a technologic...
Article
Full-text available
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)....
Article
A severe boron pollution has been recognized in the shallow aquifer of Isola di Castelluccio (central-eastern Tuscany, Italy) since 2009. Previous investigations showed that the high boron concentrations (up to 57 mg L-1) were related to an anthropogenic source. It was likely due to current and/or past industrial and artisanal activities, which wer...
Article
A severe boron pollution has been recognized in the shallow aquifer of Isola di Castelluccio (central-eastern Tuscany, Italy) since 2009. Previous investigations showed that the high boron concentrations (up to 57 mg L-1) were related to an anthropogenic source. It was likely due to current and/or past industrial and artisanal activities, which wer...
Article
Full-text available
Little is known about the quantity and quality of dissolved organic matter (DOM) in waters from continental geothermal systems, with only a few reports available from the Yellowstone US National Park. In this study, we explored the chemodiversity of DOM in water samples collected from two geothermal hot springs from the Kenyan East African Rift Val...
Article
Full-text available
This study focuses on the geochemical features of the presently discharging thermal and cold springs and on paleofluids from the upstream portion of the Reno river basin (Alto Reno; central–northern Italy). The aim is investigating the primary sources of the modern and fossil fluids and the interactions between deep and shallow aquifers. Paleofluid...
Article
The Planchón – Peteroa Volcanic Complex exhibits two active degassing areas: Peteroa crater, PC, and peripheral hydrothermal areas, analyzed in three sampling sites, namely Valle Baños del Azufre, VBA, Valle del Peñón, VP and Valle Valenzuela, VZ. This prospective study was designed to investigate the soil diffuse emissions of CO2 at this volcanic...
Article
Stable isotope analysis of animal tissues is commonly used to infer diet and trophic position. However, it requires destructive sampling. The analysis of carbon isotopes from exhaled CO2 is non‐invasive and can provide useful ecological information because isotopic CO2 signatures can reflect the diet and metabolism of an animal. However, this metho...
Article
This work presents chemical and isotopic (δ13C-CO2, δ13C-CH4, 3He, 4He, 20Ne, 40Ar, 36Ar, δ18O and δD) data on fluid discharges from the Colpitas-Taapaca volcanic-hydrothermal system, located close to the Taapaca Volcanic Complex, with the aim to investigate the physical-chemical conditions of the fluid source and to provide a preliminary evaluatio...
Article
This work presents chemical and isotopic (δ13C-CO2 , δ13C-CH4 , 3He, 4He, 20Ne, 40Ar, 36Ar, δ18O and δD) data of fluid discharges from Colpitas-Taapaca volcanic-hydrothermal system, located close to the Taapaca Volcanic Complex, with the aim to investigate the physical-chemical conditions of the fluid source and to provide a preliminary evaluation...
Article
This work presents the first carbon dioxide diffuse degassing survey carried out in the Cerro Blanco Geothermal System (CBGS; Southern Puna plateau, NW Argentina) with the aim to estimate the thermal energy release. The survey was divided into (i) a prospecting stage of the degassing sites within the CBGS and (ii) mapping of the selected diffuse de...
Article
With this study a nine-year hiatus (May 2010-April 2019) in the quantification of the CO2 content of Lago Albano by our working group has been resolved through the acquisition and analysis from two new field campaigns. Based on a CO2 budget analysis the dynamics of CO2 degassing throughout the past thirty years (1989-2019) is detailed and quantifie...
Article
This work presents the first chemical and isotopic (δ13C-CO2, δ13C-CH4, 3He, 4He, 20Ne, 40Ar, 36Ar, δ18O, and δD) data for fluid discharges from Guallatiri volcano, a remote and massive stratovolcano, which is considered as the second most active volcano of the Central Volcanic Zone (CVZ) in northern Chile. Fumarolic gases had outlet temperatures o...
Article
The lithium-rich brines of the Salar de Olaroz in the Central Andes of NW Argentina are considered to be of great economic and strategic interest. This study focused on the fluid source(s) and geochemical processes governing the chemical and isotopic characteristics of the surficial waters of Olaroz (residual brines, ephemeral lakes, rivers and tri...
Conference Paper
Full-text available
Guallatiri (18°25’S, 69°05’W; 6073 m a.s.l.) is a giant and active stratovolcano located in northern Chile, near the Chile-Bolivia border. On the top and SW flank, it presents hundreds of fumarolic emissions. The summit area hosts a permanent glaciar cap that feeds the hydrothermal system of the volcano as well as cold/thermal springs emerging at t...
Article
Fluid primary source(s) and chemical-physical processes controlling water and gas chemistry of thermal springs from Eastern Cordillera, sub-Andean Ranges and Santa Bárbara (Jujuy Province, northern Argentina) were investigated to provide information for a preliminary evaluation of the geothermal potential in these areas. Thermal manifestations in E...
Article
The geochemical composition of waters from wells fed by Taftan aquifer located east of Taftan volcano, mainly focusing on the distribution of arsenic, was investigated in order to provide insights into the geochemical processes controlling the chemistry of the shallow aquifer and the possible influence of hydrothermal fluids from the volcano on gro...
Article
Azerbaijan is famous for the impressive phenomenon of mud volcanism that dominates the landscape of the central sector of the country. The gases released are here strongly CH4 enriched. Conversely, the Lesser Caucasus to the NW host numerous thermo-mineral springs into which CO2-rich gas are bubbling. In the Talysh area, located to SE at the border...
Article
A geochemical survey was carried out (May 2016) in the Rincón de Parangueo maar in Valle de Santiago, México. The challenge was to measure CO2 and CH4 fluxes discharged from soil and to investigate the chemical and isotopic compositions of interstitial soil gases and remaining vents at the bottom of maars system subjected to critical and high rate...
Conference Paper
El Complejo Volcánico Planchón – Peteroa se encuentra localizado sobre la frontera entre Argentina y Chile, en la Provincia de Mendoza y en la Región del Maule, según se trate del lado argentino o del chileno. Este trabajo tiene por objetivo realizar un estudio de base de las emisiones difusas de dióxido de carbono (CO2), en este complejo volcánico...
Article
Saline-alkaline lakes of the East African Rift are known to have an extremely high primary production supporting a potent carbon cycle. To date, a full description of carbon pools in these lakes is still missing. More specifically, there is not detailed information on the quality of dissolved organic matter (DOM), the main carbon energy source for...
Article
Full-text available
A geochemical study was carried out on gas, water and mud samples from four mud volcanoes in Gorgan Plain, SE Caspian Sea (Iran) in order to investigate fluid primary sources and secondary processes controlling fluid chemistry. The chemical composition of light alkanes and the isotopic feature of methane indicated an origin related to a thermogenic...
Article
Thermal springs of the Bazman geothermal field, 27 km south of the Holocene Bazman volcano caldera in Makran continental margin, SE Iran, were studied for the first time. New data on major components, selected trace elements (Li, Rb, Cs, Ba, Sr, Fe, Al), water isotopic composition (H, O and S), chemical and isotopic (δ¹³C of CO2 and CH4, ³He/⁴He an...
Chapter
Full-text available
The Hg-exploitation (1847-1974) in the Mt. Amiata area (central Italy) affected the local economic and social conditions. The Hg-mines were far from the main roads and in-situ extraction and purification processes of cinnabar to obtain liquid mercury were developed. As the Hg-concentration in the ore deposit was relatively low (about 2‰), the Abbad...
Article
Full-text available
Direct and indirect effects of extremely high geogenic CO 2 levels, commonly occurring in volcanic and hydrothermal environments, on biogeochemical processes in soil are poorly understood. This study investigated a sinkhole in Italy where long-term emissions of thermometamorphic-derived CO 2 are associated with accumulation of carbon in the topsoil...
Conference Paper
Full-text available
Mercury exploitation in the Mt. Amiata area (Italy) lasted about 130 years (1847-1974) and affected the local economic conditions. About 100,000 tons of mercury were produced from roasted cinnabar. The mining complex covers about 65 ha and contains mining structures and workers' edifices. Since 2010, efforts by the local authorities were done to in...
Conference Paper
Full-text available
Chemical and isotopic vertical profiles from the volcanic lakes of Sete Cidades, Santiago, Fogo, Congro and Furnas (Island of São Miguel, Azores Archipelago, Portugal) were studied to investigate the biogeochemical processes acting at different depths, with a focus on the CO2 and CH4 dynamics. These lakes are fed by meteoric water affected by seawa...
Conference Paper
Full-text available
In April 2019, in the framework of the FISR-2016 CALAPA project, Lake Albano (Colli Albani volcanic complex, Rome, Italy) was the target of a geochemical sampling and measurement campaign, the first one of this kind since May 2010 (Chiodini et al., 2012). Conductivity, pH, and temperature were measured along the vertical profile of the lake, until...
Conference Paper
Full-text available
Volcanic lakes are characterized by physicochemical favorable conditions for the development of reservoirs of greenhouse gases that can be dispersed to air during occasional rollover events. By combining a microbiological and geochemical approach, we showed that the chemistry of the CO2-and CH4-rich gas reservoir hosted within the meromictic Lake A...
Conference Paper
Full-text available
In November 2016, a geochemical survey based on water and dissolved gas chemistry was carried out at Coatepeque (on the E slope of Santa Ana Volcano), Ilopango (inside Ilopango Caldera) and Chanmico (associated with San Salvador Volcano) volcanic lakes in El Salvador, a land characterized by complex fault systems and related volcanism. The three la...