Geochemical and mineralogical control on the mobility of arsenic in a waste rock pile at Dlouhá Ves, Czech Republic

Kocourková, Eva; Šráček, Ondřej; Houzar, Stanislav; Cempírek, Jan; Losos, Zdeněk; Filip, Jan; Hršelová, Pavla

doi:10.1016/j.gexplo.2011.02.009

Cited by 44 publications

(27 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This indicates that Pb-As jarosite can be a candidate for immobilization of arsenic and Pb 2+ . Kocourková et al (2011) even consider it as a "long-term" option for arsenic immobilization. The research of Kingsbury and Hartley (1960) on minerals related to mine sites, mentions the transformation of carminite to beudantite, and the beudantite may transform to plumbojarosite or beaverite.…”

Section: Calorimetric Datamentioning

confidence: 99%

“…Jarosite has also been detected on Mars, and shown to be stable under likely Martian temperature conditions , giving evidence this planet's surface once contained water (Klingelhöfer et al, 2004). Kocourková et al (2011) suggested that beudantite is better suited for long-term arsenic storage than jarosite, which appears to be less stable.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis, characterization and thermochemistry of synthetic Pb–As, Pb–Cu and Pb–Zn jarosites

Forray

Smith

Navrotsky

et al. 2014

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

The enthalpy of formation from the elements of well characterized Pb-As, Pb-Cu, measured by high temperature oxide melt solution calorimetry and gave !Hº f = -3691.2 ± 8.6 kJ/mol, !Hº f = -3653.6 ± 8.2 kJ/mol, and !Hº f = -3669.4 ± 8.4 kJ/mol, respectively. Using estimated entropies, the standard Gibbs free energy of formation from elements at 298 K !Gº f of the three compounds were calculated to be -3164.8 ± 9.1 kJ/mol, -3131.4 ± 8.7 kJ/mol, and -3153.6 ± 8.9 kJ/mol, respectively. Based on these free energies, their logK sp values are -13.94 ± 1.89, -4.38 ± 1.81 and -3.75 ± 1.80, respectively. For tis compounds, a log 10 {Pb 2+ } -pH diagram is presented. The diagram shows that the formation of Pb-As jarosite may decrease aqueous arsenic and lead concentrations to meet drinking water standards. The new thermodynamic data confirm that transformation of Pb-As jarosite to plumbojarosite is thermodynamically possible.

show abstract

Section: Calorimetric Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and thermochemistry of synthetic Pb–As, Pb–Cu and Pb–Zn jarosites

Forray

Smith

Navrotsky

et al. 2014

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

show abstract

“…The longtime period of pile evolution could also affect the amount of clay minerals in the pile, but in this case it is not completely clear if this fine-grained material has anthropogenic origin. The clay content is much higher at Kaňk compared to As-rich pile at Dlouhá Ves located southeast from Kaňk (Kocourková et al 2011). At Dlouhá Ves, the material is relatively coarse grained and bukovskýite has not been found.…”

Section: Discussionmentioning

confidence: 85%

“…In such case, weathering is relatively fast and released As is predominantly incorporated into jarosite-beudantite group minerals (Forray et al 2014;Gieré et al 2003). Arsenic is strongly bound in scorodite and beudantite, therefore its concentration in pore waters are low (Kocourková et al 2011). In contrast, a r s e n i c c a n b e r e l e a s e d f r o m j a r o s i t e a n d hydroniumjarosite relatively easily because it is relatively weakly bound and its mobility is also increased by the competition with sulphate (Gräfe et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Secondary arsenic minerals and arsenic mobility in a historical waste rock pile at Kaňk near Kutná Hora, Czech Republic

et al. 2014

Self Cite

View full text Add to dashboard Cite

The arsenic mineralization in historical waste rock pile at Kaňk site near Kutná Hora developed over a period of about 500 years. The objective of this study was to determine principal secondary arsenic mineral phases and their environmental stability. The only common primary As-bearing mineral -arsenopyrite -occurs in the mineral assemblage of Kutná Hora base-metal deposit together with quartz, pyrite, sphalerite, and pyrrhotite. Most of arsenic is bound in supergene minerals (scorodite, jarosite-beudantite, bukovskýite, pitticite), which are relatively stable under oxidizing conditions prevailing in the pile. The Kaňk site is a type locality for bukovskýite, kaňkite, zýkaite, and parascorodite. In long-term perspective, the most stable minerals from viewpoint of Asbinding appear to be scorodite and beudantite. A higher mobility was observed for As incorporated into jarosite and poorly crystalline to amorphous phases (FeIIIoxyhydroxides, pitticite). This study has not confirmed significant mobility of arsenic within the pile and water infiltrating in recharge periods of the year (late winter-early spring) should not mobilize arsenic at a significant rate.However, monitoring of the stability of secondary Asphases and dissolved arsenic in the environment around the pile is required to avoid future migration of arsenic out of the pile.

show abstract

“…the use of soil as sealant layer in this work also seemed to be the best alternative, and the contents of as, fe and S in the leachate were significantly lower compared to the use of other materials (contrast c 7 ; table 5). this is probably because the principal secondary as-rich phases were fe(III)-oxyhydroxides (i.e., goethite) (Kocourková et al, 2011). arsenic and S leaching was significantly lower when laterite was present in this layer, compared to the presence of B1 substrate, however there was no significant difference to fe leaching (contrast c a4 ).…”

Section: General Treatment Effectsmentioning

confidence: 88%

Induction of a geochemical barrier for As, Fe and S immobilization in a sulfide substrate

Assis

Dias

Ribeiro

et al. 2012

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

SummarYacid mine drainage (amd) is an environmental concern due to the risk of element mobilization, including toxic elements, and inclusion in the food chain. In this study, three cover layers were tested to minimize as, fe and S mobilization from a substrate from former gold mining, containing pyrite and arsenopyrite. for this purpose, different layers (capillary break, sealant and cover layer) above the substrate and the induction of a geochemical barrier (GB) were used to provide suitable conditions for adsorption and co-precipitation of the mobilized as. thirteen treatments were established to evaluate the leaching of as, fe and S from a substrate in lysimeters. the ph, as, fe, S, na, and K concentrations and total volume of the leachates were determined. mineralogical analyses were realized in the substrate at the end of the experimental period. lowest amounts of as, fe and S (average values of 5.47, 48.59 and 132.89 g/lysimeter) were leached in the treatments that received na and K to induce GB formation. mineralogical analyses indicated jarosite formation in the control treatment and in treatments that received na and K salts. however, the jarosite amounts in these treatments were higher than in the control, suggesting that these salts accelerated the GB formation. high amounts of as, fe and S (average values of 11.7, 103.94 and 201.13 g/lysimeter) were observed in the leachate from treatments without capillary break layer. the formation of geochemical barrier and the use of different layers over the sulfide substrate proved to be efficient techniques to decrease as, fe and S mobilization and mitigate the impact of acid mine drainage. Index-terms: jarosite, arsenic, cover layers, gold mining, rehabilitation.(1) Part of mSc dissertation of first author presented at the Soil Science Post-Graduation Program of federal university of Viçosa, ufV. this work received financial support from fapemig and Inct-aqua (cnPq

show abstract

Geochemical and mineralogical control on the mobility of arsenic in a waste rock pile at Dlouhá Ves, Czech Republic

Cited by 44 publications

References 49 publications

Synthesis, characterization and thermochemistry of synthetic Pb–As, Pb–Cu and Pb–Zn jarosites

Synthesis, characterization and thermochemistry of synthetic Pb–As, Pb–Cu and Pb–Zn jarosites

Secondary arsenic minerals and arsenic mobility in a historical waste rock pile at Kaňk near Kutná Hora, Czech Republic

Induction of a geochemical barrier for As, Fe and S immobilization in a sulfide substrate

Contact Info

Product

Resources

About