Geochemical evaluation of soil, surface water and groundwater around the Tongon gold mining area, northern Côte d’Ivoire, West Africa

Sako, Aboubakar; Semdé, Sanata; Wenmenga, Urbain

doi:10.1016/j.jafrearsci.2018.05.016

Cited by 35 publications

(30 citation statements)

References 59 publications

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“…This may be explained by the fact that colonization rate is limited and impeded on newly formed soils [13]. Soil biological activity on degraded lands is relatively low [33,59] due to disturbed structure of the soil profile, and lack of appropriate water and air conditions [6] or amount of organic matter [7], whereas on undisturbed habitats, such as forest habitats, the upper layer of soils may be well covered by a litter layer [60] or vegetation which can be important buffers in ecologically stressful situations, for example droughts [19].…”

Section: Discussionmentioning

confidence: 99%

“…The soil, more precisely soil substrate, on post-mining sites (e.g., external dumps), differs significantly from forest soils, in structural, physical, chemical and biological parameters [5]. The characteristic features of soils such as structure of the soil profile, appropriate water and air conditions [6], amount of organic matter [7] and high microbiological activity are absent [5]. However, thanks to the specific conditions that arose as a result of human activity on degraded sites subjected to reclamation, these areas may be potential habitats for many species of animals [8][9][10][11], including mites [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Succession of Mite Assemblages (Acari, Mesostigmata) during Decomposition of Tree Leaves in Forest Stands Growing on Reclaimed Post-Mining Spoil Heap and Adjacent Forest Habitats

Urbanowski

Horodecki

Kamczyc

et al. 2018

Forests

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Mites significantly contribute, prevalently by vertical movement, to mixing of the organic layer with the mineral soil, thus they may be important in renewing soils. Our aim was to analyze the changes in abundance and species richness of mesostigmatid assemblages on decomposing leaves of Alnus glutinosa (L.) Gaertn., Betula pendula Roth, Pinus sylvestris L. and Quercus robur L. in pine and birch stands growing on a reclaimed spoil heap and adjacent forests. In December 2013, 1024 litterbags (mesh size = 1 mm) containing leaf litter of broadleaved and coniferous trees (mean initial dry weight per sample = 5.789 g) were laid out in the same number and kind in each of the two sites. Mites were extracted from litterbags which were collected every 3–6 months for 3 years. In total, 6466 mites were identified in 59 taxa. Total abundance was higher on forest habitats (5174 specimens) compared to the spoil (1292), and in birch compared to pine stands, both in forest (3345, 1829, respectively) and spoil habitats (981, 311). Throughout the experiment, mites were most abundant on oak litter samples (2063 specimens), while the remaining litter types had similar abundances (1455–1482). At the beginning of the experiment (3–6 months) mite abundance was very low, but was higher on forest habitats. The highest abundance was found after 9 months—144 specimens in pine stands on the spoil heap and 685 in birch stands on forest habitats. During the study, 49 taxa were found on forest and 29 on heap habitats. In birch stands, 37 and 22 taxa were found, whereas in pine 30 and 21, on forest and heap, respectively. The most frequent species on the heap were Amblyseius tubae Karg, Asca bicornis Canestrini et Fanzago, and Asca aphidioides Linneaeus, whereas in forest habitat—Zercon peltatus C.L. Koch, Veigaia nemorensis C.L. Koch, and Trachytes aegrota C.L. Koch. Habitat conditions, tree species and litter type significantly determined the mesostigmatid species composition, richness and abundance. By selection of dominant tree species during afforestation, it is possible to significantly affect the soil fauna composition, and thus indirectly the rate of decomposition.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Succession of Mite Assemblages (Acari, Mesostigmata) during Decomposition of Tree Leaves in Forest Stands Growing on Reclaimed Post-Mining Spoil Heap and Adjacent Forest Habitats

Urbanowski

Horodecki

Kamczyc

et al. 2018

Forests

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“…Sediment grain size data from the study areas showed that all the sediments had a sandy texture. The geology of the savannah district which is essentially based on a large set of homogenous and heterogeneous biotile granitoids (Sako et al 2018) could explain this sandy texture.…”

Section: Surface Sediment Characteristicsmentioning

confidence: 99%

Speciation and Spatial Distribution of Trace Metals in Sediments Around Gold Mining Areas in Northern Côte D’Ivoire

N’goran

Diabaté

Kouassi

et al. 2021

Preprint

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The purpose of this study was to investigate the spatial distribution, possible sources, and potential ecological risks associated with traces metals Cu, Mn and Ni in sediments around gold mine areas in northern Côte d’Ivoire. The sampling was conducted in industrial and artisanal and small-scale gold mining sites in Korhogo and Tengrela. Analysis of variance was performed to ascertain spatial differences. The possible sources of pollution were identified using the enrichment factor, principal component, and hierarchical cluster analysis. Trace metals Cu, Ni and Mn concentrations in sediments did not vary across the stations. The same spatial mapping distribution trend was observed for Ni, while those of Cu and Mn differed among the stations. The geoaccumulation index indicated low to moderate contamination of Cu, Mn and Ni at Korhogo and Tengrela. The results of principal component and hierarchical cluster analysis indicated that Cu, Ni, and Mn were generated both by anthropogenic and natural inputs, which were confirmed by the enrichment factor. The potential ecological risks indicated that Cu, Mn and Ni could pose low risk to organisms at Korhogo and Tengrela. This study provides first trace metals data in sediments across Korhogo and Tengrela gold mine areas. The sequential extraction procedure proposed by the Community Bureau of Reference (BCR) showed that a major portion (between 59.68 to 79.22 %) of Cu, Ni and Mn is highly associated with the residual fraction, showing their low mobility.

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“…In Côte d'Ivoire, Sako et al [6] found arsenic concentrations between 11.3 and 3809 mg/kg in soils in mining areas. Under some physicochemical conditions, arsenic compounds are particularly soluble and consequently become very bioavailable and can affect agricultural production and food quality due to bioaccumulation [7].…”

Section: Introductionmentioning

confidence: 99%

Phytoextraction Capacity of <i>Chrysopogon nigritanus</i> Grown on Arsenic Contaminated Soil

Cyrille¹,

Messou²,

Ouattara³

et al. 2021

OJAppS

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This study aims to investigate the capacity of Chrysopogon nigritanus to accumulate As from contaminated soils. The experiment was conducted in a greenhouse. C. nigritanus was subjected to uncontaminated soil and As contaminated soil (50 mg/kg, 100 mg/kg and 150 mg/kg of As), for 180 days. Plant growth and biomass produced, concentration of As in soil and plant, bioaccumulation and transfer factors, as the location of As in tissues and cells of the plant have been determined. Plant growth decreased significantly with increasing of soil As concentration. C. nigritanus accumulated more As in roots biomass. The highest bioaccumulation factor values were found in contaminated soil at 50 mg As/kg (As 50), then contaminated soil at 100 mg As/kg (As 100) and contaminated soil at 150 mg As/kg (As 150). As was essentially fixed to the intracellular compartment of the roots, stems and leaves. In roots tissues, As was mainly retained in the rhizodermis and the pericycle. While in stems tissues, As was preferentially accumulated in the conductive bundles. In the leaves, the final destination of As was epidermis tissues.

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Geochemical evaluation of soil, surface water and groundwater around the Tongon gold mining area, northern Côte d’Ivoire, West Africa

Cited by 35 publications

References 59 publications

Succession of Mite Assemblages (Acari, Mesostigmata) during Decomposition of Tree Leaves in Forest Stands Growing on Reclaimed Post-Mining Spoil Heap and Adjacent Forest Habitats

Succession of Mite Assemblages (Acari, Mesostigmata) during Decomposition of Tree Leaves in Forest Stands Growing on Reclaimed Post-Mining Spoil Heap and Adjacent Forest Habitats

Speciation and Spatial Distribution of Trace Metals in Sediments Around Gold Mining Areas in Northern Côte D’Ivoire

Phytoextraction Capacity of <i>Chrysopogon nigritanus</i> Grown on Arsenic Contaminated Soil

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Geochemical evaluation of soil, surface water and groundwater around the Tongon gold mining area, northern Côte d’Ivoire, West Africa

Cited by 35 publications

References 59 publications

Succession of Mite Assemblages (Acari, Mesostigmata) during Decomposition of Tree Leaves in Forest Stands Growing on Reclaimed Post-Mining Spoil Heap and Adjacent Forest Habitats

Succession of Mite Assemblages (Acari, Mesostigmata) during Decomposition of Tree Leaves in Forest Stands Growing on Reclaimed Post-Mining Spoil Heap and Adjacent Forest Habitats

Speciation and Spatial Distribution of Trace Metals in Sediments Around Gold Mining Areas in Northern Côte D’Ivoire

Phytoextraction Capacity of &lt;i&gt;Chrysopogon nigritanus&lt;/i&gt; Grown on Arsenic Contaminated Soil

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Phytoextraction Capacity of <i>Chrysopogon nigritanus</i> Grown on Arsenic Contaminated Soil