Chemical fractionation and bioaccessibility of potentially toxic elements in area of artisanal gold mining in the Amazon

Teixeira, Renato Alves; Souza, Edna Santos de; Moraes, Alessandra Jackeline Guedes de; Campos, Willison Eduardo Oliveira; Amarante, Cristine Bastos do; Martins, Gabriel Caixeta; Fernandes, Antônio Rodrigues

doi:10.1016/j.jenvman.2020.110644

Cited by 33 publications

(14 citation statements)

References 74 publications

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“…Specifically, the F 1 percentage of As, Sb, Zn and Cd in the sediment was significantly higher than Cr, Co, Ni and Cu; they have higher mobility. Therefore, they can be easily used by aquatic organisms for gold mining, especially since the gold-carrying minerals and associated minerals of this type of gold deposit are rich in a large number of As and Sb [37][38][39], consistent with our previous analysis. ( 2) Almost all the F 2 and F 3 fractions of As and HMs have a certain proportion.…”

Section: Chemical Forms Of As and Hms In Sedimentssupporting

confidence: 88%

“…Simultaneously, the accumulation of As and Sb in the sediments downstream of the confluence, that is, the intersection of the mining wastewater treatment plant outlet and TC karst river (TC 4 ), was also very high, reaching the peak of the TC karst river. This indicates that gold mining seriously impacts the accumulation of As, Sb, Zn and Cd in the sediments, especially As and Sb [37][38][39], similar to the study of other gold deposits [40][41][42][43]. In addition, the As and HMs background in the gold mining area may also be another reason [44].…”

Section: Concentration and Accumulation Changes Of As And Hms In Sedi...supporting

confidence: 69%

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Arsenic and Heavy Metals in Sediments Affected by Typical Gold Mining Areas in Southwest China: Accumulation, Sources and Ecological Risks

Chen

Zha

et al. 2023

IJERPH

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Gold mining is associated with serious heavy metal pollution problems. However, the studies on such pollution caused by gold mining in specific geological environments and extraction processes remain insufficient. This study investigated the accumulation, fractions, sources and influencing factors of arsenic and heavy metals in the sediments from a gold mine area in Southwest China and also assessed their pollution and ecological risks. During gold mining, As, Sb, Zn, and Cd in the sediments were affected, and their accumulation and chemical activity were relatively high. Gold mining is the main source of As, Sb, Zn and Cd accumulation in sediments (over 40.6%). Some influential factors cannot be ignored, i.e., water transport, local lithology, proportion of mild acido-soluble fraction (F1) and pH value. In addition, arsenic and most tested heavy metals have different pollution and ecological risks, especially As and Sb. Compared with the other gold mining areas, the arsenic and the heavy metal sediments in the area of this study have higher pollution and ecological risks. The results of this study show that the local government must monitor potential environmental hazards from As and Sb pollution to prevent their adverse effects on human beings. This study also provides suggestions on water protection in the same type of gold-mining areas.

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Section: Chemical Forms Of As and Hms In Sedimentssupporting

confidence: 88%

Section: Concentration and Accumulation Changes Of As And Hms In Sedi...supporting

confidence: 69%

Arsenic and Heavy Metals in Sediments Affected by Typical Gold Mining Areas in Southwest China: Accumulation, Sources and Ecological Risks

Chen

Zha

et al. 2023

IJERPH

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“…Numerous studies in the goldmine regions on the contamination and risks of PTEs via different environmental media have been well documented around the globe, e.g., in China (Huang et al, 2020), Brazil (Pereira et al, 2020), Nigeria (Adewumi and Laniyan, 2020), Ghana (Hadzi et al, 2018), Bolivia (Pavilonis et al, 2017), Papua New Guinea (Kapia et al, 2016). However, only limited information is available on PTEs contamination from the gold mining activities around the Wainivesi River in Fiji so far (Matakarawa, 2018;Kumar et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Potentially toxic elemental contamination in Wainivesi River, Fiji impacted by gold-mining activities using chemometric tools and SOM analysis

Kumar

Islam

Hasanuzzaman

et al. 2022

Environ Sci Pollut Res

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Potentially toxic elements (PTEs) contamination in Wainivesi River, Fiji triggered by gold-mining activities is a major public health concern deserving attention. However, chemometric approaches and pattern recognition of PTEs in surface water and sediment are yet hardly studied in Paci c Island countries like Fijin urban River. In our study, twenty-four sediment and eight water sampling sites from the Wainivesi River, Fiji were explored to evaluate the spatial pattern, eco-environmental pollution, and source apportionment of PTEs. This analysis was done using an integrated approach of self-organizing map (SOM), principle component analysis (PCA), hierarchical cluster analysis (HCA), and indexical approaches. The PTEs average concentration is decreasing order of Fe > Pb > Zn > Ni > Cr > Cu > Mn > Co > Cd for water and Fe > Zn > Pb > Mn > Cr > Ni > Cu > Co > Cd for sediment, respectively. Outcomes of eco-environmental indices including contamination and enrichment factors, and geo-accumulation index differed spatially indicated that majority of the sediment sites were highly polluted by Zn, Cd, and Ni. Cd and Ni contents can cause both ecological and human health risks. According to PCA, two sources such as point and geogenic sources for sediment and also two sources including weathering of rock-water and anthropogenic sources of PTEs for water were identi ed in the study area. The SOM analysis identi ed three spatial patterns e.g., Cr-Co-Zn-Mn, Fe-Cd and Ni-Pb-Cu in water and Zn-Cd-Cu-Mn, Cr-Ni and Fe, Co-Pb in sediment. Spatial distribution of entropy water quality index values depicted that northern and northwestern areas possess 'poor' to 'extremely-poor' quality water. The entropy weights indicated Zn, Cd and Cu as the major pollutants in deteriorating the water quality. Our nding provides a baseline database with eco-environmental and health risk measures for the Wainivesi river contamination.

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“…In the region where mining sites and local rural communities co-exist, HMs exposures have led to adverse impacts on the aquatic ecosystem and human health (Li et al, 2014). Recently, more attention has been paid to the exposure of HMs in the goldmine regions, intending to appraise the risks of human exposure to mine waste which is linked with their persistence and transferability in the food system (Souza et al, 2017;Hadzi et al, 2018;Pereira et al, 2020). Anthropogenic activities such as mining and dumping of mine wastes have interplayed vital roles in increasing the contents of HMs in the environment (Fashola et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Few studies have reported that residents have raised their concern on high contamination of surface water, drinking water and sulfur dioxide emissions in the study region (Ackley, 2008;Matakarawa, 2018). Though many cited works on the risks of HMs via environmental media in the goldmine regions have been reported worldwide, e.g., in China (Huang et al, 2020), Brazil (Pereira et al, 2020), Nigeria (Adewumi and Laniyan, 2020), Ghana (Hadzi et al, 2018), Bolivia (Pavilonis et al, 2017), Papua New Guinea (Kapia et al, 2016). However, there is yet scarce literature on HMs contamination from the VGR in Fiji (Matakarawa, 2018).…”

Section: Introductionmentioning

confidence: 99%

Water resources pollution associated with risks of heavy metals from Vatukoula Goldmine region, Fiji

Kumar

Islam

et al. 2021

Journal of Environmental Management

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Chemical fractionation and bioaccessibility of potentially toxic elements in area of artisanal gold mining in the Amazon

Cited by 33 publications

References 74 publications

Arsenic and Heavy Metals in Sediments Affected by Typical Gold Mining Areas in Southwest China: Accumulation, Sources and Ecological Risks

Arsenic and Heavy Metals in Sediments Affected by Typical Gold Mining Areas in Southwest China: Accumulation, Sources and Ecological Risks

Potentially toxic elemental contamination in Wainivesi River, Fiji impacted by gold-mining activities using chemometric tools and SOM analysis

Water resources pollution associated with risks of heavy metals from Vatukoula Goldmine region, Fiji

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