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HERO ID
1797784
Reference Type
Journal Article
Title
(Micro)spectroscopic analyses of particle size dependence on arsenic distribution and speciation in mine wastes
Author(s)
Kim, CS; Chi, C; Miller, SR; Rosales, RA; Sugihara, ES; Akau, J; Rytuba, JJ; Webb, SM
Year
2013
Is Peer Reviewed?
1
Journal
Environmental Science & Technology
ISSN:
0013-936X
EISSN:
1520-5851
Volume
47
Issue
15
Page Numbers
8164-8171
Language
English
PMID
23889478
DOI
10.1021/es4010653
Web of Science Id
WOS:000323013400013
URL
https://pubs.acs.org/doi/abs/10.1021/es4010653
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Abstract
The chemical speciation and distribution of potentially toxic metal(loid)s in mine wastes is critical to assessing the risks posed by these wastes and predicting the potential bioavailability of the metal(loid)s present. Of additional potential importance is the role of particle size in the fate, transport, and toxicity of contaminated mining materials. Spectroscopic analyses of size-separated mine tailings and adjacent background samples from the Randsburg Historic Mining District, California were conducted to quantify the speciation and distribution of arsenic (As) as a function of particle size. Micro-X-ray fluorescence (μXRF) mapping of separate size fractions was used to identify multiple populations of particles with different As:Fe ratios, indicating a variety of distinct arsenic-bearing species. Bulk extended X-ray absorption fine structure (EXAFS) spectroscopy identified phases including arseniosiderite, Ca2Fe3(3+)(AsO4)3O3·3H2O, and As(V) sorbed to iron hydroxides (ferrihydrite, goethite), confirming a strong statistical correlation between arsenic and iron observed in both μXRF studies and bulk chemical analyses. Differences in As speciation between the mine tailings and background samples also suggest that weathering of crystalline As-bearing phases in tailings leads to sorption of dissolved arsenic to iron hydroxides in nontailings background material.
Tags
•
Arsenic Hazard ID
PubMed
Considered New
PubMed
ToxNet
Considered New
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
2. Lit Search Updates through Oct 2015
PubMed
ToxNet
Considered
7. Other Studies through Oct 2015
Other
•
Arsenic (Inorganic)
1. Literature
Lit search updates through Oct 2015
3. Hazard ID Screening
Other potentially supporting studies
•
Methylmercury
ADME Search: Jan 1990 - Nov 2018
Results with mercury
WoS
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