Cadmium, lead, and arsenic contamination in paddy soils of a mining area and their exposure effects on human HEPG2 and keratinocyte cell-lines

Xue, Shengguo; Shi, Lizheng; Wu, Chuan; Wu, Hui; Yun, Qin; Pan, Wulue; Hartley, William; Cui, Meng-qian

doi:10.1016/j.envres.2017.03.014

Cited by 171 publications

(28 citation statements)

References 59 publications

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“…Additionally, the release of heavy metals into the groundwater is associated with Fe(III) oxyhydroxide minerals by dissolution or transformation [ 3 – 7 ]. Due to the potential ecological and human health risks [ 8 – 9 ] associated with such a release, the growing awareness of the environmental protection calls for a better understanding of the mineralogical characteristics and transport of metals under extremely acidic conditions of AMD. Thus, a sound geochemical investigation is required at all stages to evolve the effective remediation of AMD area [ 10 – 11 ].…”

Section: Introductionmentioning

confidence: 99%

Mineralogical characteristics of sediments and heavy metal mobilization along a river watershed affected by acid mine drainage

et al. 2018

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Trace-element concentrations in acid mine drainage (AMD) are primarily controlled by the mineralogy at the sediment-water interface. Results are presented for a combined geochemical and mineralogical survey of Dabaoshan Mine, South China. Developed sequential extraction experiments with the analysis of the main mineralogical phases by semi-quantitative XRD, differential X-ray diffraction (DXRD) and scanning electron microscopy (SEM) were conducted to identify the quantitative relationship between iron minerals and heavy metals. Results showed that schwertmannite, jarosite, goethite and ferrihydrite were the dominant Fe-oxyhydroxide minerals which were detected alternately in the surface sediment with the increasing pH from 2.50 to 6.93 along the Hengshi River. Decreasing contents of schwertmannite ranging from 35 wt % to 6.5 wt % were detected along the Hengshi River, which was corresponding to the decreasing metal contents. The easily reducible fractions exert higher affinity of metals while compared with reducible and relatively stable minerals. A qualitative analysis of heavy metals extracted from the sediments indicated that the retention ability varied: Pb > Mn > Zn > As ≈ Cu > Cr > Cd ≈ Ni. Results in this study are avail for understanding the fate and transport of heavy metals associated with iron minerals and establishing the remediation strategies of AMD systems.

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Section: Introductionmentioning

confidence: 99%

Mineralogical characteristics of sediments and heavy metal mobilization along a river watershed affected by acid mine drainage

et al. 2018

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“…Cadmium is a non-essential element, representing an environmental hazard to human health when contaminates the food chain, causing cumulative toxic effects in diverse human organs [38]. Cadmium and Zinc are present in mine discharges, which disperses into air, water and soils, contaminating areas nearby mines [39]. However, in Yanomami/Brazil area, Cadmium contamination may occur as consequence of the continuous discharge of batteries anywhere by the Yanomami along decades.…”

Section: Discussionmentioning

confidence: 99%

Gut Microbiome Functional and Taxonomic Diversity within an Amazonian semi-nomadic hunter-gatherer group

Conteville

Oliveira-Ferreira

Vicente

2019

Preprint

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23Background: Human gut microbiome profiles have been associated with 24 human health and disease. These profiles have been defined based on 25 microbes' taxonomy and more recently, on their functionality. Human groups 26 that still maintain traditional modes of subsistence (hunter-gatherers and rural 27 agriculturalists) represent the groups non-impacted by urban-industrialized 28 lifestyles, and therefore study them provide the basis for understanding the 29 human microbiome evolution. The Yanomami is the largest semi-nomadic 30 hunter-gatherer group of the Americas, exploring different niches of the Amazon 31 rainforest in Brazil and Venezuela. In order to extend the analysis of this unique 32 and diverse group, we focused on the gut microbiome of the Yanomami from 33Brazil and compared with those from Venezuela, and also with other traditional 34 groups from the Amazon, considering taxonomic and functional profiles. 35 Results: A diversity of taxonomic biomarkers were identified to each South 36 American traditional group studied, including the two Yanomami groups, despite 37 their overall similarity in the taxonomic gut microbiome profiles. Broader levels 38 of functional categories poorly discriminated traditional and urban-industrialized 39 groups. Interestingly, a diversity was observed with the stratification of these 40 categories, clearly segregating those groups. The Yanomami/Brazil gut 41 microbiome presented unique functional features, such as a higher abundance 42 of gene families involved in regulation/cell signaling, motility/chemotaxis, and 43 virulence, contrasting with the microbiomes from the Yanomami/Venezuela and 44 other groups. 45 Conclusions: Our study revealed biomarkers, taxonomic and functional 46 differences between the gut microbiome of Yanomami/Brazil and 47 Yanomami/Venezuela individuals. This intra-Yanomami group diversity was 48 accessed due to the increase number of individuals and group studied. These 49 differences may reflect their semi-nomadic behavior, as well as, the local and 50 seasonal diversity of the vast rainforest niche they explore, despite their shared 51 cultural and genetic background. Overall, their microbiome profiles are shared 52 with South American and African traditional groups, probably due to their 53 lifestyle. The unique features identified within the Yanomami highlight the bias 54 imposed by underrepresented sampling, and factors such as variations over 55 space and time (seasonality) that impact, mainly, the hunter-gatherers. 56 Therefore, to reach knowledge about human microbiome variations and their 57 implications in human health, it is essential to enlarge data concerning the 58 number of individuals, as well as the groups representing different lifestyles. 59 60

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“…Arsenic (As) pollution in soil represents one of the most prominent environmental hazards from abandoned mine lands (C. Liu et al, ; Xue et al, ). Elevated levels of As frequently occur in arsenic mineral deposits, especially in emerged realgar (As 4 S 4 ) mines (Y. Wu, Zhou, et al, ).…”

Section: Introductionmentioning

confidence: 99%

Addition of graphene sheets enhances reductive dissolution of arsenic and iron from arsenic contaminated soil

Chen

et al. 2018

Land Degrad Dev

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The deposition of slag from a realgar tailing mine has caused serious land degradation to those farming and mining coexisting areas. However, nanomaterial‐mediated biogeochemical arsenic cycle from arsenic‐enriched soil was severely limited. In this study, the environmental impact of graphene oxide (GO) and reduced GO (rGO) on the speciation and mobilization of Fe/As from the flooding of arsenic‐enriched soil was investigated. Regarding overall performance, rGO exhibited a more significant facilitation than GO on mediating microbial reduction of Fe(III)/As(V). The maximal levels of soluble Fe(II) and As(III) in the soil supplemented with acetate alone were 53.58 g.m−3 and 9592 mg·m−3 during the 50‐day culture period. Nearly 1.37‐fold and 1.15‐fold of As(III) levels were released when amending with rGO acetate and GO acetate. Meanwhile, approximately 1.40‐fold and 1.24‐fold of Fe(II) levels were released under the same conditions. The underlying mechanism was correlated with the interactions between graphene and microbial activities. The properties of GO have been evolved through microbial reduction and eventually exhibited characteristics similar to rGO. Additionally, the application of graphene potentially altered the compositions of the microbial community and increased the abundance of some metal‐reducing bacteria (e.g., Bacillus, Geobacter, and Desulfitobacterium), thereby favouring the dissolved organic matter bioavailability for bioreduction of Fe(III)/As(V). In addition, promotion of the electron transfer process of As(V)/Fe(III) reduction was predominantly responsible for the crucial role that rGO exhibited as a special redox‐active mediator and electrical conductor. These findings might provoke more consideration of the integrated ecological effects of graphene and evaluate their environmental impact on land degradation.

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Cadmium, lead, and arsenic contamination in paddy soils of a mining area and their exposure effects on human HEPG2 and keratinocyte cell-lines

Cited by 171 publications

References 59 publications

Mineralogical characteristics of sediments and heavy metal mobilization along a river watershed affected by acid mine drainage

Mineralogical characteristics of sediments and heavy metal mobilization along a river watershed affected by acid mine drainage

Gut Microbiome Functional and Taxonomic Diversity within an Amazonian semi-nomadic hunter-gatherer group

Addition of graphene sheets enhances reductive dissolution of arsenic and iron from arsenic contaminated soil

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