Arsenic bioaccessibility in gold mine tailings of Delita, Cuba

Toujaguez, Regla; Ono, Fábio Benedito; Martins, Vanessa; Cabrera, Pablo J.; Blanco, Andrés; Bundschuh, Jochen; Guilherme, Luiz Roberto Guimarães

doi:10.1016/j.jhazmat.2013.01.045

Cited by 39 publications

(21 citation statements)

References 25 publications

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“…In addition, the authors suggest that REE bioaccessibility in food is reduced due to the presence of organic complexes, such as phytates. These results are relevant, since bioaccessibility studies performed for other elements show evidences to conclude that an overestimation of risk can occur if the risk evaluation considers only the total contents [164,165]. Adding to this, there is also the need for speciation studies, in order to identify the soluble and insoluble species for each soil environment [79,157].…”

Section: Ecological and Human Health Risks Associated With Reementioning

confidence: 99%

Rare Earth Elements in the Soil Environment

et al. 2016

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Rare earth elements (REE) are a homogenous group of 17 chemical elements in the periodic table that are key to many modern industries including chemicals, consumer electronics, clean energy, transportation, health care, aviation, and defense. Moreover, in recent years, they have been used in agriculture. One of the consequences of their worldwide use is the possible increase of their levels in various environmental compartments. This review addresses major topics concerning the study of REE in the soil environment, with special attention to the latest research findings. The main sources of REE to soils, the contents of REE in soils worldwide, and relevant information on the effects of REE to plants were explored. Ecological and human health risk issues related to the presence of REE in soils were also discussed. Although several findings reported positive effects of REE on plant growth, many questions about their biological role remain unanswered. Therefore, studies concerning the actual mechanism of action of these elements on cellular and physiological processes should be further refined. Even more urgent is to unveil their chemical behavior in soils and the ecological and human health risks that might be associated with the widespread use of REE in our modern society.

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Section: Ecological and Human Health Risks Associated With Reementioning

confidence: 99%

Rare Earth Elements in the Soil Environment

et al. 2016

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“…scorodite, forms coatings and small aggregates in its surroundings. Scorodite is relatively stable and may limit As concentration in pore water as observed in mine tailings under cold climate conditions at Saskatchewan, Canada, (Langmuir et al 2006), and waste rock piles under tropical climate conditions of Cuba (Toujaguez et al 2013). Another important factor may be the presence of pyrite within the mineral assemblage.…”

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

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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.

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“…The processing of gold bearing sulphide minerals which contain arsenopyrite and other complex arsenic sulphide minerals results in arsenic containing emissions and effluents which must be given careful consideration in relation to clean air and clean water standards. In fact, there are numerous cases at the global level where gold mining operations have caused a release and redistribution of arsenic into the environment [4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Arsenic Mobility in As-Containing Soils from Geogenic Origin: Fractionation and Leachability

Prieto

Cancelo-González

Barral

2018

Journal of Chemistry

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The lithogenic arsenic in soils of the Anllóns River basin (Spain) was quantified, its chemical fractions were determined, and its leachability characteristics were compared under various experimental conditions. Fifty soil samples of C horizons, sampling an area of 50 km 2 along the river course, were submitted to an exploratory analysis. Pseudo-total arsenic ranged between 2 and 489 mg kg −1 . Arsenic leachability using the standard methods DIN 38414-S4 and TCLP was less than 0.25% of pseudo-total As. Then the effect of pH (3, 6, and 9), solid : liquid (S : L) ratio (1 : 10 and 1 : 50), phosphate (10 mM), and contact time (24 and 240 h) on arsenic mobilization was studied in nine soils with the highest As concentration. Arsenic mobilization increased at alkaline pH and lower S : L ratio; the most decisive factor was the addition of phosphate, increasing arsenic leachability up to 1,000 times, and this increased even 2.3 times when the contact time was extended from 24 hours to 240 hours. The results suggest that the mobilization of arsenic may be underestimated in short-term water leaching tests and that the environmental conditions favouring arsenic mobilization should be taken into account for a sound evaluation of the transfer risk of arsenic towards aquatic ecosystems.

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Arsenic bioaccessibility in gold mine tailings of Delita, Cuba

Cited by 39 publications

References 25 publications

Rare Earth Elements in the Soil Environment

Rare Earth Elements in the Soil Environment

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

Arsenic Mobility in As-Containing Soils from Geogenic Origin: Fractionation and Leachability

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