skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Synchrotron based study of As mobility and speciation in tailings from a mining site in Mexico

Authors:
; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1419537
Grant/Contract Number:
AC02-05CH11231
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Environmental Chemical Engineering (Online)
Additional Journal Information:
Journal Name: Journal of Environmental Chemical Engineering (Online); Journal Volume: 5; Journal Issue: 1; Related Information: CHORUS Timestamp: 2018-05-23 04:28:54; Journal ID: ISSN 2213-3437
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Loredo-Portales, R., Castillo-Michel, H., Aquilanti, G., De La Rosa-Álvarez, Ma. G., Rocha-Amador, D. O., Vogel-Mikus, K., Kump, P., and Cruz-Jiménez, G.. Synchrotron based study of As mobility and speciation in tailings from a mining site in Mexico. Netherlands: N. p., 2017. Web. doi:10.1016/j.jece.2017.01.019.
Loredo-Portales, R., Castillo-Michel, H., Aquilanti, G., De La Rosa-Álvarez, Ma. G., Rocha-Amador, D. O., Vogel-Mikus, K., Kump, P., & Cruz-Jiménez, G.. Synchrotron based study of As mobility and speciation in tailings from a mining site in Mexico. Netherlands. doi:10.1016/j.jece.2017.01.019.
Loredo-Portales, R., Castillo-Michel, H., Aquilanti, G., De La Rosa-Álvarez, Ma. G., Rocha-Amador, D. O., Vogel-Mikus, K., Kump, P., and Cruz-Jiménez, G.. Wed . "Synchrotron based study of As mobility and speciation in tailings from a mining site in Mexico". Netherlands. doi:10.1016/j.jece.2017.01.019.
@article{osti_1419537,
title = {Synchrotron based study of As mobility and speciation in tailings from a mining site in Mexico},
author = {Loredo-Portales, R. and Castillo-Michel, H. and Aquilanti, G. and De La Rosa-Álvarez, Ma. G. and Rocha-Amador, D. O. and Vogel-Mikus, K. and Kump, P. and Cruz-Jiménez, G.},
abstractNote = {},
doi = {10.1016/j.jece.2017.01.019},
journal = {Journal of Environmental Chemical Engineering (Online)},
number = 1,
volume = 5,
place = {Netherlands},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jece.2017.01.019

Save / Share:
  • Knowledge of selenium's chemical speciation is necessary for understanding the trace element's mobility and bioavailability. The mobility of many trace element chemical species is controlled by such chemical parameters as pH, soil moisture content, and redox potential. The necessity for selenium as a nutritional as a nutritional requirement adds a new dimension to the element selenium. Previously, selenium had been established as a toxic agent in food and feed crops. Selenium as the selenate species is predominant in strong oxidizing condition, becoming the most soluble and less adsorbing on soil matrices, and, thus the more bioavailable Se form. Redox potentialmore » and pH quantify the redox environment in aqueous soil systems. Selenium availability at various soil pH and redox potentials can lead to a better understanding of soil Se and contribute to management schemes needed to eliminate Se problems associated with reclamation activities with the surface mining of coal. Research investigation considered the field measurement of redox potential and pH variations which may occur in Oklahoma soils associated with mining and reclamation activities on potential Se speciation. Also, the magnitude of selenate and selenite adsorption in water-saturated soil columns was measured to determine the mobility of selenium through overburden materials used as reclamation material. In-situ field monitoring systems were used to determine subsurface soil moisture content and the oxidation-reduction potential characteristic. Soil samples were analyzed for pH using appropriate soil chemical analysis procedures. The Toxicity Characteristic Leaching Procedure data obtained indicates less than 0.1 mg Se/kg sample in composite soils collected from a reclaimed mining site in Okmulgee County, Oklahoma. Comparison of pH and Eh data measured in overburden used for reclamation fill, predicted the predominant Se species to be elemental Se, HseO[sub 3][sup [minus]], or SeO[sub 3][sup 2[minus]].« less
  • The mineral form, grain size and texture of As-bearing particles are important factors influencing the risk to human health associated with exposure to As-contaminated soils, sediments and mine wastes. Mining of arsenopyrite-bearing gold ores in Nova Scotia in the late 1800s and early 1900s has left a legacy of weathered, As-rich tailings deposits in more than 60 gold districts across the province. Fourteen samples of near-surface tailings and one of soil from several former gold mines frequented by the public were sieved to <150 {mu}m and characterized using conventional mineralogical techniques (XRD, microscopy and EPMA) and synchrotron micro-analysis ({mu}-X-ray diffraction,more » {mu}-X-ray fluorescence and {mu}-X-ray absorption spectroscopy). This study is part of a broader coordinated effort by a multi-department federal and provincial advisory committee formed to coordinate the study of ecosystem and human health risks associated with historical gold mine sites in Nova Scotia. Our study shows that (i) the mineralogy of As in weathered tailings is highly variable, with aggregates of more than one As-bearing phase common in a given sample, and (ii) major differences in As mineralogy in the tailings are mainly controlled by factors that influence the weathering history (e.g., presence or absence of mill concentrates, degree of water saturation, and abundance of relict carbonate minerals). The variable solubility of these primary and secondary As-bearing minerals influences both the environmental mobility and the bioaccessibility of As in near-surface tailings and soil samples.« less