Geochemical characterization and modeling of arsenic behavior in a highly contaminated mining soil

Bisone, Sara; Chatain, Vincent; Blanc, D.; Gautier, Mathieu; Bayard, Rémy; Sanchez, Florence; Gourdon, Rémy

doi:10.1007/s12665-015-5203-z

Cited by 21 publications

(13 citation statements)

References 33 publications

(39 reference statements)

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“…The transformation of natural ecosystems during open-cast mining reduces the amount of wildlife habitat and endangers populations of rare, endemic or threatened species [5,6]. To reduce these environmental changes, the mitigation hierarchy offers a useful form of guidance [7,8].…”

Section: Introductionmentioning

confidence: 99%

Land Cover Changes in Open-Cast Mining Complexes Based on High-Resolution Remote Sensing Data

et al. 2020

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Remote sensing technologies can play a fundamental role in the environmental assessment of open-cast mining and the accurate quantification of mine land rehabilitation efforts. Here, we developed a systematic geographic object-based image analysis (GEOBIA) approach to map the amount of revegetated area and quantify the land use changes in open-cast mines in the Carajás region in the eastern Amazon, Brazil. Based on high-resolution satellite images from 2011 to 2015 from different sensors (GeoEye, WorldView-3 and IKONOS), we quantified forests, cangas (natural metalliferous savanna ecosystems), mine land, revegetated areas and water bodies. Based on the GEOBIA approach, threshold values were established to discriminate land cover classes using spectral bands, the normalized difference vegetation index (NDVI), normalized difference water index (NDWI) and a light detection and range sensor (LiDAR) digital terrain model and slope map. The overall accuracy was higher than 90%, and the kappa indices varied between 0.82 and 0.88. During the observation period, the mining complex expanded, which led to the conversion of canga and forest vegetation to mine land. At the same time, the amount of revegetated area increased. Thus, we conclude that our approach is capable of providing consistent information regarding land cover changes in mines, with a special focus on the amount of revegetation necessary to fulfill environmental liabilities.

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Section: Introductionmentioning

confidence: 99%

Land Cover Changes in Open-Cast Mining Complexes Based on High-Resolution Remote Sensing Data

et al. 2020

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“…Indeed, As is oxidised to arsenite to then precipitate during roasting from vapours to become As 2 O 3 . Several studies report an association of As with gold deposits containing sulphide minerals (Antwi-Agyei, Hogarh, & Foli, 2009;Bisone et al, 2016;Chakraborti et al, 2013;Houben, D'Onofrio, Kokelj, & Blais, 2016;Nyanza, Dewey, Thomas, Davey, & Ngallaba, 2014;Ollson, Smith, Scheckel, Betts, & Juhasz, 2016;Ono, Tappero, Sparks, & Guilherme, 2016;Toujaguez et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Artisanal gold‐mining in a rural environment: Land degradation in Kenya

Odumo

Nanos²,

Carbonell³

et al. 2018

Land Degrad Dev

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Artisanal gold‐mining (AGM) is one of the most important activities in the districts of Migori and Transmara (Kenya). Gold‐mining, however, is known to release vast quantities of arsenic and metals (some of which are very toxic like As, Hg, Cd, or Pb), which poses a serious threat to not only miners but also to the ecosystem and local populations. We, herein, determine the concentrations of arsenic and some heavy metals in several sample types (i.e., ore, soil, river sediment, and mine tailing) collected from the districts of Migori and Transmara. We also employ lichens and mosses as pollution bioindicators. Geostatistical tools and canonical correlation analysis were used to identify the relevant factors that affected arsenic and metal concentrations in the analysed samples. The following concentration ranges were reported in topsoil: As (1–17,250 mg kg−1), Cd (0.01–15.10 mg kg−1), Cu (7–9,238 mg kg−1), Cr (1–214 mg kg−1), Ni (5–766 mg kg−1), Pb (3–1,149 mg kg−1), and Zn (22–1,271 mg kg−1). It was concluded that the ecosystem in both districts was highly polluted by heavy metals whereas the arsenic concentrations in topsoil were among the highest reported worldwide. The results of this study provide new evidence on the impact of AGM on the environment and may further contribute to the design of policy measures with the aim of reducing environmental and human health risks associated to AGM activities.

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“…The adsorption phenomena with the surface complexation model of Pb and As on Hfo and Surf [27,28,29,30] could be a reason for the low concentration of ions in the solutions (Table 6) due to favorable conditions in forming the FeOOH phase (Figure 2c). The base for Hfo formation was the iron from the slag (Table 2) [9,18].…”

Section: Discussionmentioning

confidence: 99%

“…The adsorption phenomena with the surface complexation model of Pb and As on hydrous ferric oxides (Hfo) and silica gel (Surf) [27,28,29,30] were considered. Thermodynamic data (log formation constant (Kf) and the dissociation constant (Kd)) [27,28,29] for adsorption with the surface complexation phenomenon of the metal ion used in the program are shown in Table 5.…”

Section: Geochemical Modeling (Phreeqc Program)mentioning

confidence: 99%

Assessment of Leaching Characteristics of Solidified Products Containing Secondary Alkaline Lead Slag

Štulović

Radovanović

Kamberović

et al. 2019

IJERPH

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Reuse of waste is one of the main principles of sustainable development and circular economy. Secondary alkaline lead slag is a hazardous waste generated in the recycling process of lead-acid batteries that may be suitable in construction materials. The environmental impact of the use of lead slag as a partial replacement of fine aggregates in the cement-based stabilization/solidification (S/S) process for the preparation of concrete was studied in this paper. Solidified products containing 10%, 15%, 20%, and 25% slag were laboratory tested by unconfined compressive strength (UCS) analyses and the Toxicity Characteristic Leaching Procedure (TCLP). At the same time, the leachability of toxic elements from solidified products with a high percent of slag was evaluated under environmental conditions for during one year. The results of the UCS and TCLP indicated that utilization of this type of slag in cement-based applications may be justified with its controlled addition. However, the described application of the slag was disputed due to the high release of As under high alkaline environmental conditions. Eh-pH analyses and the geochemical modeling using the software PHREEQC were evaluated, as well as the mechanism of pollutant (Pb, As) immobilization (precipitation, adsorption) as a function of pH conditions.

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Geochemical characterization and modeling of arsenic behavior in a highly contaminated mining soil

Cited by 21 publications

References 33 publications

Land Cover Changes in Open-Cast Mining Complexes Based on High-Resolution Remote Sensing Data

Land Cover Changes in Open-Cast Mining Complexes Based on High-Resolution Remote Sensing Data

Artisanal gold‐mining in a rural environment: Land degradation in Kenya

Assessment of Leaching Characteristics of Solidified Products Containing Secondary Alkaline Lead Slag

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