Dissolved phosphate decreases the stability of amorphous ferric arsenate and nano-crystalline yukonite
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10481126" target="_blank" >RIV/00216208:11310/24:10481126 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=yfEvUBIo.b" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=yfEvUBIo.b</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jhazmat.2024.134374" target="_blank" >10.1016/j.jhazmat.2024.134374</a>
Alternative languages
Result language
angličtina
Original language name
Dissolved phosphate decreases the stability of amorphous ferric arsenate and nano-crystalline yukonite
Original language description
Extensive research has been conducted on the competitive adsorption of arsenate (AsO4(3-)) and phosphate (PO4(3-)) to mineral surfaces, but the stability of ferric arsenate mineral(oid)s under elevated phosphate levels remains poorly understood. Therefore, we investigated the impact of dissolved phosphate (0, 0.5, 50 mM) on the stability of amorphous ferric arsenate (AFA; FeAsO4 & sdot;nH2O) and nano-crystalline yukonite [Ca2Fe3(AsO4)3(OH)4 . 4H2O], both synthetic and contained in natural As-contaminated soil (~16 g/kg As) and mine-waste material (~39 g/kg As) for up to one year. Substantial amounts of As (~45% of total As) were released into solution from AFA and yukonite at high phosphate concentrations due to incongruent dissolution of the solids and substitution of arsenate by phosphate in both mineral(oids). After one year, both solids sequestered ~8 wt% P with approximately 20-30% accounting for adsorbed and precipitated species. This P increase was also observed in the soil and mine-waste samples, where AFA and yukonite comprised up to 4.3 and 4.9 wt% P, respectively. The high reactivity of ferric arsenates with aqueous phosphate may lead to a substantial overestimation of adsorbed As determined by sequential As extractions of materials containing these phases and requires increased caution when applying phosphate to stabilize polymetallic mine wastes. Furthermore, long-term phosphate additions via fertilization of As-contaminated soil or renaturalized mine tailings containing amorphous or nano-crystalline ferric arsenates should be reduced to limit the export of As(V) into surface streams and groundwater.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
<a href="/en/project/GA22-27939S" target="_blank" >GA22-27939S: Effects of soil geochemistry and mineralogy on the mobility and bioaccessibility of arsenic from soils with different phosphate levels</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Hazardous Materials
ISSN
0304-3894
e-ISSN
1873-3336
Volume of the periodical
471
Issue of the periodical within the volume
June
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
134374
UT code for WoS article
001237477200001
EID of the result in the Scopus database
2-s2.0-85191479941