2024-03-29T01:00:17Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1443012019-08-08T07:09:00Zcom_10261_77com_10261_8col_10261_330
Gómez-González, Miguel A.
Bolea, Eduardo
O'Day, Peggy
García-Guinea, Javier
Garrido, Fernando
Laborda, Francisco
2017-02-20T11:23:11Z
2017-02-20T11:23:11Z
2016-07
Analytical and Bioanalytical Chemistry 408(19): 5125-5135 (2016)
http://hdl.handle.net/10261/144301
10.1007/s00216-016-9331-4
http://dx.doi.org/10.13039/501100003329
Abstract Detection and sizing of natural colloids involved in
the release and transport of toxic metals and metalloids is
essential to understand and model their environmental effects.
Single-particle inductively coupled plasma mass spectrometry
(SP-ICP-MS) was applied for the detection of arsenic-bearing
particles released from mine wastes. Arsenic-bearing particles
were detected in leachates from mine wastes, with a mass-perparticle
detection limit of 0.64 ng of arsenic. Conversion of the
mass-per-particle information provided by SP-ICP-MS into
size information requires knowledge of the nature of the particles;
therefore, synchrotron-based X-ray absorption spectroscopy
(XAS) was used to identify scorodite (FeAsO4·2H2O) as
the main species in the colloidal particles isolated by ultrafiltration.
The size of the scorodite particles detected in the
leachates was below 300¿350 nm, in good agreement with
the values obtained by TEM. The size of the particles detected
by SP-ICP-MS was determined as the average edge of
scorodite crystals, which show a rhombic dipyramidal form,
achieving a size detection limit of 117 nm. The combined use
of SP-ICP-MS and XAS allowed detection, identification, and
size determination of scorodite particles released from mine
wastes, suggesting their potential to transport arsenic.
eng
closedAccess
Arsenic
Scorodite
Colloids
XAS
SP-ICP-MS
Single particle
Combining single-particle inductively coupled plasma mass spectrometry and X-ray absorption spectroscopy to evaluate
the release of colloidal arsenic from environmental samples
artículo