Ignasi Queralt

Ignasi Queralt
Spanish National Research Council | CSIC · Institute of Environmental Assessment and Water Research

PhD-Earth Sciences

About

199
Publications
46,739
Reads
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4,423
Citations
Citations since 2016
53 Research Items
2232 Citations
20162017201820192020202120220100200300
20162017201820192020202120220100200300
20162017201820192020202120220100200300
20162017201820192020202120220100200300
Introduction
Ignasi Queralt currently works at the Institute of Environmental Assessment and Water Research, Spanish National Research Council. Ignasi does research in Analytical Geochemistry and Mineralogy. Their current project is on geochemistry around old minelands and application of X-ray spectrometry for the elemental analysis of materials (soils, plants, polluted water, artworks,...)
Additional affiliations
December 2015 - January 2016
Spanish National Research Council
Position
  • Researcher
January 1990 - December 2013
July 1989 - November 1990
University of Barcelona
Position
  • Professor (Assistant)
Education
July 1988
University of Barcelona
Field of study
  • Earth Sciences

Publications

Publications (199)
Article
Large-scale Zn, Pb, Cu, Fe and Ag mining ceased over 70 years ago in the Aran Valley (Catalonia, Spain). Some of the abandoned mining relics (e.g. tunnels, processing facilities and tailings dumps) exhibit elevated concentrations of metals in the associated water systems, thus posing a health risk in the neighboring ecosystem. In this study, the la...
Article
Full-text available
Code and data sharing are crucial practices to advance toward sustainable archaeology. This article explores the performance of supervised machine learning classification methods for provenancing archaeological pottery through the use of freeware R code in the form of R Markdown files. An illustrative example was used to show all the steps of the n...
Article
In recent years, the conceptual advancement on green analytical chemistry (GAC) has moved in parallel with efforts to incorporate new screening or quantitative low-cost analytical tools to solve analytical problems. In this sense, the role of solid state techniques that allow the non-invasive analysis (or with a minimum sample treatment) of solid s...
Chapter
Presently, the development of analytical methods to determine elemental composition of vegetation samples is of significance in many different fields. This chapter discusses the details and potentials of different X‐ray fluorescence (XRF) configurations in the field of multi‐elemental analysis of vegetation samples. Most commonly used sample treatm...
Article
In this contribution, the analytical potential of total reflection X-ray fluorescence (TXRF) instrumentation has been evaluated for the determination of major and trace elements in milk powder. TXRF allows the possibility of direct analysis of solid suspensions without the need for a digestion process and therefore it can be a potential analytical...
Article
Capillary diffraction or microdiffraction are standard techniques for characterizing small samples when only a few milligrams are available. On the other hand, we have typical grazing incidence diffraction or different variations of grazing incidence (GI) diffraction used, such as in-plane grazing incidence (IP-GI) or GI using a micro focusing sour...
Article
This contribution describes the study conducted on two painted wooden reliefs created in the early 1970s by Vasko Lipovac, a prominent Croatian contemporary artist. Due to the poor condition in which the artworks were found, it was important to establish a strategy for conservation and long-term preservation. Accordingly, preliminary knowledge abou...
Article
Full-text available
Archaeometric studies on mosaics often concentrate only on glass tesserae, while comprehensive studies including both stone and glass tesserae are scarce; however, both types of tesserae can sometimes bring relevant data to elaborate archaeological knowledge on a studied mosaic. In this paper, a representative set of tesserae from a large polychrom...
Article
To better understand the geochemical alteration of the interface between wellbore Portland cement and rock because of potential leakage during CO2 storage operations, we performed percolation experiments using three solid cores each made of two half-cylinders, one of hydrated Portland cement and the other of calcareous rock (limestone, marl or sand...
Article
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In most clinical and nutritional studies, it is of significance to know information about the multielemental composition of biological samples. Conventional analysis of biological samples relies upon sample digestion followed by atomic spectrometry detection. This approach is essential for the quantification of ultratrace elements in biological sam...
Article
AMD is the acidic discharge generated by the oxidation of sulfide minerals from active or disused mine workings and contains high concentrations of toxic metals and sulfuric acid. Host rocks and concrete-based infrastructures in permanent contact with AMD are highly vulnerable to the geochemical processes caused by acidity (e.g. concrete corrosion)...
Article
In this paper, the determination of ultratrace heavy metal ions was developed by combining a preconcentration method using graphene oxide/carbon nanotubes membranes (GO/CNTs) and total-reflection X-ray fluorescence spectrometry (TXRF). Due to the excellent adsorptive properties of the GO, the foregoing membranes are suitable for effective simultane...
Article
Trace elements are essential for the normal spermatogenesis of mammals and play a critical role in sperm quality, but pathological processes e.g. inflammation, as well. Consequently, multi-elemental analysis of seminal plasma (SP) may provide significant information on physiological and pathophysiological processes occurring in the male reproductiv...
Article
In the last decade, green chemistry has been attracting great interest in many contexts, including, among others, natural antioxidants. However, only a few works deal with natural residue extracts and biowaste, which could be an efficient, economical and environmentally friendly source for the production of useful compounds. In this study, we look...
Article
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Sorptive and selective mini-membranes based on TiO2 directly synthesized onto cellulose filters (TiO2@cellulose) have been developed. The in situ synthesis of TiO2@cellulose applied is simple and economically advantageous. The obtained membranes can be useful for (1) separating arsenic(V) and selenium(IV) from other ions and organic matter, (2) spe...
Preprint
Full-text available
The traditional pottery industry was an important activity in Catalonia (NE Spain) up to the 20th century. However, nowadays only few workshops persist in small villages were the activity is promoted as a touristic attraction. The preservation and promotion of traditional pottery in Catalonia is part of an ongoing strategy of tourism diversificatio...
Article
In-situ monitoring of potentially toxic elements in mining water samples is of special relevance in order to evaluate the environmental impact of abandoned mining activities. However, it is difficult to develop suitable analytical methods for this purpose considering the complexity of mining water samples matrix as well as the limited sensibility o...
Article
Construction materials affected by black crusts (BCs) can be subjected to restoration, demolition, recycling or even to their management as waste products. Therefore, the determination of their chemical features should be considered a crucial step before undertaking any action. In this work, we present the development of an analytical methodology u...
Article
In this work, we compared the accuracy of gold leaves thickness determination using X-ray Fluorescence (XRF) setups for different X-ray excitation sources. The sources used consisted on: a) direct Bremsstrahlung from an Amptek Mini-X X-ray tube with Rh target, b) partially monochromatized radiation of the same X-ray tube using combination of Al and...
Article
This paper shows a simple, rapid and cost-effective method for multielement analyses of cosmetics. Total reflection X-ray fluorescence spectrometry (TXRF) is used to determine the composition, particularly the presence of potentially toxic elements, of cosmetics. Three sample preparation methods based on suspension preparation were developed for di...
Article
Abstract As the demand for critical and valuable metals increases due to industrial developments, especially in electronics and high-technology industries, the search for novel and sustainable sources grows in significance. Incinerated municipal solid waste (MSW) is a potential source of valuable metals, since a lot of waste from electrical and el...
Article
Exposure to arsenic (As)through drinking water results in accumulation of As and its methylated metabolites in several organs, promoting adverse health effects, particularly potential development of cancer. Arsenic toxicity is a serious global health concern since over 200 million people are chronically exposed worldwide. Abundant biochemical and e...
Article
The aim of the present work is the development of a simple, sensitive and sustainable EDXRF method for the determination of trace amounts of sulfur in biodiesel samples. In this method, the deposition of several microliters of sample onto an organic thin layer and the analysis of the resulting adsorbed biodiesel spot by benchtop EDXRF is proposed....
Article
The production of silver nanoparticles (AgNPs)has increased tremendously during recent years due to their antibacterial and physicochemical properties. As a consequence, these particles are released inevitably into the environment, with soil being the main sink of disposal. Soil interactions have an effect on AgNP mobility, transport and bioavailab...
Article
The Huarenchenque Fm is a Pleistocene clastic sedimentary unit that crops out in the SW of the Neuquén Basin, Argentina. This unit is made up of cross stratified basalt-dominated sandstones and conglomerates with pumice clasts in a fluvial context. The roundness of these pumice clasts, the numerous fragments of shards and their association with pol...
Article
Multielemental analysis of whole blood can provide significant information for the evaluation of nutritional status and diagnosis of certain diseases as well as for the assessment of exposure to potentially toxic metals. However, the quantification of multiple elements in whole blood is not easy partly because of the wide variation in element conce...
Article
At present, there is a considerable interest in Hg monitoring in water samples due to its widespread occurrence and the high toxicity of most of its compounds. Hg determination in water samples by means of total reflection X-ray fluorescence spectrometry (TXRF) entails some difficulties due to the high vapour pressure and low boiling point of this...
Article
The aim of the work is to present a systematic evaluation of the analytical capabilities of the new X-ray fluorescence facility jointly operated between the International Atomic Energy Agency and the Elettra Sincrotrone Trieste for multipurpose total reflection X-ray fluorescence analysis. The analytical performance of the XRF beamline end-station...
Article
Full-text available
A nanocomposite prepared from graphene nanosheets and cerium nanoparticles (G/CeO2) was applied to the extraction of Se(IV), As(V), As(III), Cu(II) and Pb(II). The structure of G/CeO2 was investigated by scanning electron microscopy, X-ray diffraction and Raman spectroscopy. The optimal pH values for extraction are 4.0 for As(V), 3.0 for Se(IV), an...
Article
Wavelength Dispersive X-ray fluorescence (WD-XRF) spectrometry has been widely used for elemental quantification of mortars and cements. In this kind of instruments, samples are usually prepared as pellets or fused beads and the whole volume of sample is measured at once. In this work, the usefulness of a dual Energy Dispersive X-ray fluorescence s...
Article
The work was conducted to establish contamination from improper disposal of hazardous wastes containing lead (Pb) and antimony (Sb) into nearby soils. Besides other elements in the affected area, the biological role of Sb, its behaviour in the pedosphere and uptake by plants and the food chain was considered. Wastes contained 139532 ± 9601 mg kg-1(...
Article
Alumina supported on graphene oxide (Al2O3/GO) nanocomposite as new nanosorbent in dispersive micro-solid phase extraction (DMSPE) for As(V) and Cr(III) preconcentration is described. The crucial issue of the study is synthesis of novel nanocomposite suitable for sorption of selected species of arsenic and chromium. Al2O3/GO demonstrates selectivit...
Article
Full-text available
In the article authors provide the geochemical dataset collected by the research group after 10 years of investigation in the Sierra Nevada National Park, Southern Spain. These data come from Holocene sedimentary records from four alpine sites (ranging from ∼2500 to ∼3000 masl): two peatlands and two shallow lakes. Different kinds of organic and in...
Article
Graphene oxide decorated with cerium (IV) oxide (GO/CeO2) was synthesized and applied in adsorption of several metal ions such as As(III), As(V), Se(IV), Cu(II) and Pb(II) from aqueous samples. The important feature of GO/CeO2 nanocomposite is also its selectivity towards selenite in the presence of selenate. The structure of GO/CeO2 has been prove...
Article
In this work, a Total Reflection X-ray fluorescence (TXRF) spectrometry based quantitative methodology for elemental characterization of liquid extracts and solids belonging to old building materials and their degradation products from a building of the beginning of 20th century with a high historic cultural value in Getxo, (Basque Country, North o...
Article
Home-based collection protocols for clinical specimens are actively pursued as a means of improving life quality of patients. In this sense, dried blood spots (DBS) are proposed as a non-invasive and even self-administered alternative to sampling whole venous blood. This contribution explores the potential of energy dispersive X-ray fluorescence sp...
Article
Full-text available
Recent studies have proved that high elevation environments, especially remote wetlands, are exceptional ecological sensors of global change. For example, European glaciers have retreated during the 20th century while the Sierra Nevada National Park in southern Spain witnessed the first complete disappearance of modern glaciers in Europe. Given tha...
Article
Samples of waste from the surface of mine tailings and agricultural topsoil samples in the vicinity of the mine were collected. The soil samples and a control sample from unpolluted area, were taken in the direction of prevailing northwest and west winds. Chemical analysis of these solids was performed using both X-ray fluorescence and X-ray diffra...
Article
Full-text available
This paper presents archaeological layer XXV from Cova del Gegant (Sitges, Barcelona), ascribed to Bronze Age, and focuses on this period’s chronological issues. Cova del Gegant yielded Late Bell Beaker pottery featuring a decorative style akin to the “Northeastern Group” (generally ascribed to Early Bronze Age), human remains associated with a col...
Article
Energy dispersive X-ray fluorescence spectrometry (ED-XRF) is widely used in art and cultural heritage for direct measurements and elemental quantification of solid samples. However, in the literature there are not works dealing with the quantitative application of ED-XRF to liquid extracts coming from samples belonging to cultural heritage. In thi...
Article
In the present contribution, benchtop total reflection X-ray fluorescence spectrometry (TXRF) has been evaluated as a cost-effective multielemental analytical technique for human placenta analysis. An easy and rapid sample preparation consisting of suspending 50 mg of sample in 1 mL of a Triton 1% solution in deionized water showed to be the most s...
Chapter
This article presents a complete review of different sample preparation methodologies before analysis by X-ray spectrometry. This article presents the basics of classical preparation for X-ray fluorescence (XRF) analysis and new methods of preparation, with emphasis on recent applications.
Article
Arsenic (As) is a worldwide environmental contaminant, which compromises immunity and causes various associated disorders. To further investigate its immunotoxicity, male Wistar rats were exposed to 100 ppm of sodium arsenite (inorganic AsIII) in drinking water for 2 months. Given that metals are significant immune regulators, their content and dis...
Article
Spontaneous and autochthonous species of plants growing on degraded and contaminated soils/spoils that survive in such environments show, in general, no symptoms of toxicity. This study compares concentrations of chemical elements in different leaves maturation and in different seasons of several native species in a massive sulphide abandoned mine...
Conference Paper
Full-text available
Mine tailing ponds are environmentally hazardous because of high susceptibility to leaching and erosion by water and wind. In this study, we demonstrate the usefulness of electrical resistivity tomography for assessing the volume and internal structure of mine tailing ponds in the abandoned Osor's mine. It is also provided significant information f...
Article
Monitoring total bromine and bromide concentrations in soils is significant in many environmental studies. Thus fast analytical methodologies that entail simple sample preparation and low-cost analyses are desired. In the present work, the possibilities and drawbacks of low-power total reflection X-ray fluorescence spectrometry (TXRF) for the deter...
Article
In the present contribution the possibilities and drawbacks of two analytical strategies based on the use of low power X-ray fluorescence systems (EDXRF and μ-XRF) have been explored for rapid multielemental analysis and chemical imaging of different edible vegetal species. The proposed methodologies allow analysis of vegetation material without co...
Article
Sea-level rise (SLR) is one of the most conspicuous examples of the environmental impact of recent climate change. Since SLR rates are not uniform around the planet, local and regional data are needed for proper adaptation plans. 210Pb-dated sediment cores were analyzed to determine the trends of sediment accretion rates (SARs) at three tropical sa...
Article
Total Reflection X-ray Fluorescence (TXRF) spectrometry is a multi-elemental technique using micro-volumes of sample. This work assessed the components contributing to the combined uncertainty budget associated with TXRFmeasurements using Cu and Fe concentrations in different spiked and natural water samples as an example. The results showed that a...
Article
Full-text available
In this work we evaluate the composition of a bronze alloy using X-ray fluorescence spectrometry (XRF) and Monte Carlo (MC) simulations. For this purpose, a 7th Century BC archaeological vase from the SW Iberian Peninsula, displaying a well formed corrosion patina was analysed by means of a portable X-ray fluorescence spectrometer. Realistic MC sim...
Article
A new method based on dispersive micro-solid phase extraction (DMSPE) and total-reflection X-ray fluorescence spectrometry (TXRF) is proposed for multielemental ultratrace determination of heavy metal ions and arsenic species. In the developed methodology the crucial issue is a novel adsorbent synthesized by grafting 3-mercaptopropyl trimethoxysila...
Article
The present contribution presents a preliminary investigation of the chemical composition with respect to major, minor, trace, and ultratrace elements in several clam species that are frequently used for human consumption in Portuguese markets and worldwide. In order to use a simple and rapid analytical methodology for clam analysis, energy dispers...
Article
This work investigates the potential of high-resolution continuum source graphite furnace atomic absorption spectrometry for the direct determination of Pd, Pt and Rh in two samples of very different nature. While analysis of active pharmaceutical ingredients is straightforward and it is feasible to minimize matrix effects, to the point that calibr...
Conference Paper
Full-text available
The accumulation of heavy metals in the coastal environment represents a major concern worldwide due to potential risks to the aquatic organisms and humans due to fish consumption. The Estero de Urias (Mazatlan City, SWGulf of California) is a highly urbanized coastal lagoon that hosts the harbour, several industries, including a thermoelectric pla...
Article
A small plate of oil on copper painting from the Italian Renaissance period was characterized by means of noninvasive spectroscopic methods. The study was conducted by the use of energy-dispersive X-ray fluorescence, X-ray diffraction, and Raman and diffuse reflectance infrared Fourier transform spectroscopies to determine the technology production...
Article
Full-text available
Until now, the determination of Cd at trace levels in aqueous samples by TXRF has been restricted. When Mo-target X-ray tubes are used, low sensitivity and interferences with Cd L-lines used for quantification prevent trace analysis. Alternatively, when W-target X-ray tubes are used Cd excitation is limited. For this reason, a sample pretreatment i...
Conference Paper
Full-text available
Three sediment cores were collected from different mangrove areas in the Estero de Urías coastal lagoon (southeast Gulf of California, Mexico). Under the current sea­level rise conditions, it might be expected that mangrove ecosystems follow a transgressional pattern where mangrove vegetation colonizes inshore areas. Elemental composition analysis...
Article
This study was aimed to achieve improved instrumental sensitivity and detection limits for multielement determination of V. Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Se, Pb and Cd in liquid samples by using different X-ray fluorescence (XRF) configurations (a benchtop energy-dispersive X-ray fluorescence spectrometer, a benchtop polarised energy-dispersive X...
Conference Paper
The Anti-Atlas of Morocco is a mountainous Paleozoic fold belt that extends NE–SW for approximately 600 km across central Morocco. Late Paleozoic deformation produced domes of Precambrian rocks, called boutonnières or inliers, and basins of Paleozoic sedimentary rocks. The Anti-Atlas has been the subject of a huge research activity during last deca...
Article
Selenium (Se) cycling around volcanoes has implications for human health given the high population density close to volcanoes and the narrow range between essential and toxic Se intake. To study the Se mobility during interaction between volcanic derived acid rain and volcanic ash, new analytical approaches are required. This paper explores the Tot...
Article
The control of metal catalyst residues (i.e., platinum group metals (PGMs)) in different stages of the manufacturing processes of the active pharmaceutical ingredients (APIs) and, especially, in the final product is crucial. For API specimens, there are strict guidelines to limit the levels of metal residues based on their individual levels of safe...