Rene Loredo-Portales

Rene Loredo-Portales
Universidad de Guanajuato · Departamento de Ciencias Ambientales

PhD
Full Time Faculty at the University of Guanjuato, Mexico.

About

29
Publications
5,249
Reads
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287
Citations
Introduction
Rene Loredo-Portales currently works at the University of Guanjuato, Environmental Department. Rene does research in atomic and molecular characterization and chemical speciation on environmental, geologic, synthetic and heritage materials. Rene works in the main research field of Biogeochemistry of Potentially Toxic Trace Elements in polluted sites in collaboration with scientists from Egypt, Italy, France and Cameroon, among others.
Additional affiliations
August 2019 - December 2019
Universidad Estatal de Sonora
Position
  • Professor
Description
  • Professor
September 2016 - March 2022
Universidad Nacional Autónoma de México
Position
  • Researcher
Description
  • Researcher
Education
January 2012 - February 2016
Universidad de Guanajuato
Field of study
  • Environmental Chemistry
August 2009 - December 2011
Universidad Autónoma de San Luis Potosí
Field of study
  • Environmetal Geochemistry
August 2003 - September 2008
Universidad Autónoma de San Luis Potosí
Field of study
  • Chemistry, Biology and Pharmacy

Publications

Publications (29)
Article
Los beneficios de la industria minera son innegables, sin embargo, los residuos son frecuentemente asociados con problemáticas medioambientales, debido la presencia de elementos potencialmente tóxicos. Las técnicas de remediación propuestas son diversas, aunque recientemente se ha popularizado el uso de biomateriales como una alternativa sustentabl...
Article
Full-text available
Abandoned mine wastes pollute the soil in their vicinities and threaten the health of livestock and human beings. This is the situation around San Felipe de Jesús in northwestern Mexico. We surveyed 900 ha of agricultural land to assess and map the concentrations of toxic elements in the topsoil to discover where pollution is serious, what its sour...
Article
Naica’s ”Cueva de los Cristales” was discovered in 2000. It has been considered particularly interesting for its beauty and the challenges it poses to crystallography. This article focuses on the study of the wall-selenite interface by various techniques, particularly X-ray diffraction (XRD), scanning electron microscopy (SEM), with emphasis on mic...
Article
Full-text available
This study focuses on the assessment of the VA materials from the Cameroon volcanic line (CVL) for their use as natural adsorbents to remove Pb(II) pollutant from aqueous solutions. The chemical speciation of lead adsorbed onto volcanic ashes based by means of inductively coupled plasma optical emission spectroscopy (ICP-OES) and X-ray absorption n...
Article
In this study, synchrotron radiation x-ray absorption spectroscopy was used to characterize natural volcanic ash from Mount Cameroon. The latter was employed for the removal of Fe³⁺ ions from aqueous solutions, as an option for its application in water treatment. The electronic properties and local structure of Fe adsorbed on the volcanic ash were...
Article
Full-text available
Rio Sonora watershed and its aquifer-located in northwest Mexico-have been influenced by mining operations for 140 years, possibly causing emissions of potentially toxic elements (PTE) and affecting health of exposed populations. On the basis of available data from governmental surveys (2014–2017) and recent sampling (2018), this study constructed...
Article
Manganese is ubiquitous in nature and essential for some metabolic reactions, but also it is present in the environment as a product of anthropogenic activities. Despite evidence linking high concentrations of Mn to several diseases, it is not commonly considered during environmental risk assessment of soils. Changes in chemical forms, oxidation st...
Article
We investigated population structure and arsenic bioaccumulation and distribution in zooplankton inhabiting highly contaminated freshwater with arsenic. We collected water and zooplankton samples over a 4 year period, determined environmental temperature as well as water temperature, pH, electrical conductivity (EC), total dissolved solids (TDS), o...
Article
Zinc speciation, chemical forms, and phytoavailability were determined within mine tailings and soil samples from a historical mining site in the Xichú district, central Mexico. For this purpose, species determination and phase mapping were conducted using XAS, μ-XRF, and μ-XRD, and chemical extraction was performed to assess chemical forms and phy...
Article
Full-text available
Past mining activities have left a legacy of abandoned mine tailing deposits whose metal contaminants poses serious risks to ecosystems and human health. While the development of a vegetated cover in mine tailings can help in mitigating these risks, the local factors limiting plant establishment in these sites are not well understood, restricting p...
Article
Full-text available
Generation, storage, and management of waste coming from industrial processes are a growing worldwide problem. One of the main contributors is the mining industry, in particular tailings generated by historical mining, which are barely maintained, especially in developing countries. Assessing the impact of a mining site to surrounding soils and eco...
Article
Synchrotron radiation (SR) is an interesting tool for probing the properties of the matter in various domains such as nanotechnology, energy materials, catalysis and the cultural heritage. Herein, we synthesized nanomultiferroic samples La1-xCexFeO3 (0.00 ≤ x ≤ 0.15) using auto combustion method and glycine as a fuel. The magnetic behavior was stud...
Article
Full-text available
The giant gypsum crystals of Naica cave have fascinated scientists since their discovery in 2000. Human activity has changed the microclimate inside the cave, making scientists wonder about the potential environmental impact on the crystals. Over the last 9 years, we have studied approximately 70 samples. This paper reports on the detailed chemical...
Article
Arsenic (As) removal from water, subject to sulfate-reducing conditions has been shown to result in safe As levels. We evaluated sulfate-reducing activity and arsenic removal by an anaerobic sludge enriched with sulfate-reducing bacteria (SRB), using zero valent iron (ZVI) as electron donor and different concentrations of AsV or AsIII (up to 5 mg/L...
Article
Abandoned mine tailings are considered as one of the main sources of potentially toxic elements. Because of the lack of supervision, particularly from small-scale or artisanal mining, abandoned tailings have become part of the natural landscape, especially in rural areas from developing countries. Abandoned mine tailings represent a latent problem...
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Full-text available
The mining industry is the major producer of acid mine drainage (AMD). The problem of AMD concerns at active and abandoned mine sites. Acid mine drainage needs to be treated since it can contaminate surface water. Constructed wetlands (CW), a passive treatment technology, combines naturally-occurring biogeochemical, geochemical, and physical proces...
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Full-text available
For the first time it is shown that carbon black inks on ancient Egyptian papyri from different time periods and geographical regions contain copper. The inks have been investigated using synchrotron-based micro X-ray fluorescence (XRF) and micro X-ray absorption near-edge structure spectroscopy (XANES) at the European Synchrotron Radiation Facilit...
Article
Mine Tailings of “La Aurora”, a mining site located in central Mexico, display anomalous concentrations of As, Zn, Pb, Cu and Cd. However, data on their potential toxicity is not available. It is known that toxicity is related to elemental speciation. In this work, we evaluated the biogeochemical dynamics of As in terms of mobility and chemical nat...
Article
This study evaluates the bioaccumulation of unweathered (U) and weathered (W) CuO in NP, bulk and ionic form (0-400 mg/kg) by lettuce exposed for 70 d in soil co-contaminated with field incurred chlordane. To evaluate CuO trophic transfer, leaves were fed to crickets (Acheta domestica) for 15 d, followed by insect feeding to lizards (Anolis carolin...
Article
Full-text available
Potentially toxic elements are usually present in mine tailings in concentrations that may threat environmental and human health. In this research, mine tailings and soils from the mine "La Aurora" located in central Mexico were studied. This mine was exploited for Pb, Zn, Ag, Cu and Au and abandoned since their last cycle in 1957. For this purpose...
Article
The removal from the solution and the accumulation of As, Cd and Cr by Typha latifolia was studied. Small plants of T. latifolia, collected from a non-contaminated site, were exposed to individual concentrations of As, Cd and Cr for 10 days. The ability of T. latifolia for the removal of toxic elements ranged from 23 % to 54 % for As, 43 %-55 % for...

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