Emiliano Stopelli

Emiliano Stopelli
Eawag: Das Wasserforschungs-Institut des ETH-Bereichs | Eawag · Department of Water Resources and Drinking Water

Scientist

About

29
Publications
6,077
Reads
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522
Citations
Citations since 2016
27 Research Items
508 Citations
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2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
Additional affiliations
June 2017 - present
Eawag: Das Wasserforschungs-Institut des ETH-Bereichs
Position
  • PostDoc Position
Description
  • Project AdvectAs, on mobilisation, transportation and retardation of Arsenic in groundwater bodies under advective conditions to derive drinking water
September 2012 - December 2016
University of Basel
Position
  • PhD Student
Description
  • Biological ice nucleating particles at tropospheric cloud heights
Education
September 2009 - April 2012
Università di Parma
Field of study
  • Environmental Sciences

Publications

Publications (29)
Article
Full-text available
Groundwater contamination of geogenic arsenic (As) remains a global health threat, particularly in south-east Asia. The prominent correlation often observed between high As concentrations and methane (CH4) stimulated the analysis of the gas dynamics in an As contaminated aquifer, whereby noble and reactive gases were analysed. Results show a progre...
Article
Full-text available
Geogenic arsenic (As) contamination of groundwater is a health threat to millions of people worldwide, particularly in alluvial regions of South and Southeast Asia. Mitigation measures are often hindered by high heterogeneities in As concentrations, the cause(s) of which are elusive. Here we used a comprehensive suite of stable isotope analyses and...
Article
Although phosphate (PO4³⁻) may play a decisive role in enriching toxic arsenic (As) in the groundwater of many Asian deltas, knowledge gaps exist regarding its interactions with As. This study investigates the simultaneous immobilisation of PO4³⁻ and As in aquifer sediments at a redox transition zone in the Red River Delta of Vietnam. The majority...
Article
Iron minerals are the most important arsenic host in As-contaminated deltaic sediments. Arsenic release from Fe minerals to groundwater exposes millions of people worldwide to a severe health threat. To understand the coupling of Fe mineralogy with As (im)mobilization dynamics, we analyzed the geochemistry and mineralogy of a 46 m long sediment cor...
Article
Full-text available
Arsenic groundwater contamination threatens the health of millions of people worldwide, particularly in South and Southeast Asia. In most cases, the release of arsenic from sediment was caused by microbial reductive dissolution of arsenic-bearing iron(III) minerals with organic carbon being used as microbial electron donor. Although in many arsenic...
Article
Full-text available
The fate of arsenic (As) in groundwater is determined by multiple interrelated microbial and abiotic processes that contribute to As (im)mobilization. Most studies to date have investigated individual processes related to As (im)mobilization rather than the complex networks present in situ. In this study, we used RNA-based microbial community analy...
Article
Full-text available
Natural organic matter (NOM) can contribute to arsenic (As) mobilization as an electron donor for microbially-mediated reductive dissolution of As-bearing Fe(III) (oxyhydr)oxides. However, to investigate this process, instead of using NOM, most laboratory studies used simple fatty acids or sugars, often at relatively high concentrations. To investi...
Article
Full-text available
Geogenic arsenic (As) contamination of groundwater poses a major threat to global health, particularly in Asia. To mitigate this exposure, groundwater is increasingly extracted from low-As Pleistocene aquifers. This, however, disturbs groundwater flow and potentially draws high-As groundwater into low-As aquifers. Here we report a detailed characte...
Article
Full-text available
We present the laboratory results of immersion freezing efficiencies of cellulose particles at supercooled temperature (T) conditions. Three types of chemically homogeneous cellulose samples are used as surrogates that represent supermicron and submicron ice-nucleating plant structural polymers. These samples include microcrystalline cellulose (MCC...
Article
Full-text available
Supplement of A comprehensive characterization of ice nucleation by three different types of cellulose particles immersed in water Naruki Hiranuma et al. Correspondence to: Naruki Hiranuma (nhiranuma@wtamu.edu) and Ottmar Möhler (ottmar.moehler@kit.edu)
Article
Full-text available
We present the laboratory results of immersion freezing efficiencies of cellulose particles at supercooled temperature (T) conditions. Three types of chemically homogeneous cellulose samples are used as surrogates that represent supermicron and submicron ice nucleating plant structural polymers. These samples include micro-crystalline cellulose (MC...
Presentation
Full-text available
Elevated concentrations of As in groundwater leading to a serious health risk for millions of people have been reported at many places all over the world. Most existing investigations are limited to a uni-disciplinary research approach, thereby neglecting the interactions between hydrochemistry, geochemistry, mineralogy, microbiology and groundwate...
Article
Full-text available
There has been increasing interest in ice nucleation research in the last decade. To identify important gaps in our knowledge of ice nucleation processes and their impacts, two international workshops on ice nucleation were held in Vienna, Austria in 2015 and 2016. Experts from these workshops identified the following research needs: (1) uncovering...
Article
Full-text available
Ice nucleation is a means by which the deposi-tion of an airborne microorganism can be accelerated under favourable meteorological conditions. Analysis of 56 snow samples collected at the high-altitude observatory Jungfrau-joch (3580 m a.s.l.) revealed an order-of-magnitude-larger dynamic range of ice-nucleating particles active at −8 • C (INPs −8)...
Article
Full-text available
Ice nucleation is a means by which the deposition of an airborne microorganism can be accelerated under favourable meteorological conditions. Analysis of 56 snow samples collected at the high altitude observatory Jungfraujoch (3580 m a.s.l.) revealed an order of magnitude larger dynamic range of ice nucleating particles active at −8 °C (INPs−8) com...
Article
Full-text available
Nucleation of ice affects the properties of clouds and the formation of precipitation. Quantitative data on how ice nucleating particles (INPs) determine the distribution, occurrence and intensity of precipitation are still scarce. INPs active at −8 °C (INPs−8) were observed for 2 years in precipitation samples at the High-Altitude Research Station...
Article
An integrated approach combining classic and molecular microbiological methods, "in vitro" bioremediation assays and groundwater numerical modeling, has been established to identify optimized solutions for remediating aquifers contaminated with organic pollutants. Bacteria have been isolated from an aquifer contaminated with toluene and methyl tert...
Article
Full-text available
Nucleation of ice affects the properties of clouds and the formation of precipitation. Quantitative data on how ice nucleating particles (INPs) determine the distribution, occurrence and intensity of precipitation are still scarce. INPs active at −8 °C (INPs−8) were observed for two years in precipitation samples at the High-Altitude Research Stati...
Article
Full-text available
Decaying leaves from Arctic regions have previously been reported to produce large numbers of ice nucleating particles (IN). Their atmospheric relevance is unclear. Our initial observations at a coastal mountain observatory in northern Norway reveal a tripling in concentrations of IN active at -15 °C (IN-15) in oceanic air after about one day of pa...
Article
Full-text available
Ice nucleation in cold clouds is a decisive step in the formation of rain and snow. Observations and modelling suggest that variations in the concentrations of ice nucleating particles (INPs) affect timing, location and amount of precipitation. A quantitative description of the abundance and variability of INPs is crucial to assess and predict thei...
Article
Full-text available
For decades, drop-freezing instruments have contributed to a better understanding of biological ice nucleation and its likely implications for cloud and precipitation development. Yet, current instruments have limitations. Drops analysed on a cold stage are subject to evaporation and potential contamination. The use of closed tubes provides a parti...

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Projects

Projects (3)
Project
This is a part of AdvectAs interdisciplinary project that gathers scientists from different research fields (geochemistry, mineralogy, microbiology, hydrochemistry, environmental physics and modelling) in order to understand and predict the large-scale and long-term mobility of As in groundwater. It is believed that bacterial transformation of As(V) and/or Fe(III) in sediments are the most important mechanisms responsible for As mobilization in sub-oxic alluvial groundwater. On the other hand, Fe(II)-oxidizing bacteria might contribute to the immobilization of As by forming Fe(III) minerals and co-precipitating As. Hence, the first goals of this project are to quantify, isolate and identify Fe(III)-reducing and Fe(II)-oxidizing microorganisms that are potentially involved in As dynamics.
Project
Goal of this interdisciplinary (geochemistry, mineralogy, microbiology, hydrochemistry, environmental physics and modelling) and international (Eawag, KIT, Uni Tübingen, CETASD Hanoi) DACH Project is to provide scientific evidence for the relevant factors determining the behaviour of As in groundwater bodies.