Heavy Metals Signature in Stream Sediments at Eséka Gold District, Central Africa: A Pre-mining Environmental Assessment

Sababa, Elisé; Bessa, Armel Zacharie Ekoa

doi:10.1007/s42250-022-00314-7

Cited by 5 publications

(1 citation statement)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The BioF of Fe in sediments showed a high positive linear regression with the concentration of Fe in the roots (Figure 12D). Cd concentrations stand out due to their correlation with certain textures pertaining to the sediment and organic matter in summer and autumn, but not with temperature, salt percentage, and pH, which coincides with previous literature [45,46]. These low concentrations in the dry season could be due to the immobilization of some of its mobile portions as a result of diagenesis, secondary to physicochemical and biological processes [45].…”

Section: Relationship Between Trace Metals In Sediments and Tissues O...supporting

confidence: 82%

RHIZOPHORA MANGLE as a Bioindicator of Environmental Exposure to Heavy Metals in the Navachiste Lagoon Complex, Sinaloa, Mexico

González-Ocampo,

Parra-Olivas,

Pérez-González

et al. 2023

Preprint

View full text Add to dashboard Cite

The objective of this work was to analyze the potential of Rhizophora mangle as a bioindicator of seven heavy metals, Fe, Cu, Zn, Mn, Ni, Cr, and Cd, in the mangrove sediments of the Navachiste lagoon complex (NAV). The concentration of trace metals (TM) in sediments and tis-sues (leaf, stembark, and root of R. mangle) were determined by digestion with nitric acid (HNO3), whereas the metal absorbance was measured by atomic absorption spectrophotometry with an air-acetylene flame. The enrichment factor, the bioavailable fraction, the seasonal varia-tion of heavy metal concentrations and their correlation with those determined in R. mangle tissues were assessed. Metal concentrations found in sediments were as following: Fe>Mn>Zn>Cr>Ni>Cu>Cd, and for tissues: Mn>Fe>Zn>Cu>Cr>Ni>Cd, and regarding the roots, the findings were as following: Fe>Mn>Zn>Cu>Cr>Ni>Cd. The highest trace metal concentra-tions were correlated with silt, clay, and organic matter in sediments with basic pH. The highest salinities were found adjacent to R. mangle trees. Of all the trace metals analyzed, there was only a positive linear regression between the bioavailability of Mn in the sediment with the concen-tration of Mn in leaf tissue consistently throughout the year. The Cu bioavailability in the sedi-ment showed similar positive linear regressions except for winter, where it did not show this pattern. These results suggest that the concentrations of Mn and Cu in the R. mangle leaf could be a potential bioindicator of environmental exposure to anthropogenic sources of contamination by these trace metals in sediments

show abstract

Section: Relationship Between Trace Metals In Sediments and Tissues O...supporting

confidence: 82%

RHIZOPHORA MANGLE as a Bioindicator of Environmental Exposure to Heavy Metals in the Navachiste Lagoon Complex, Sinaloa, Mexico

González-Ocampo,

Parra-Olivas,

Pérez-González

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Geochemical Baseline and Pre-Mining Environmental Assessment of Heavy Metals at Iron Exploration Area, Northeastern Aswan, Egypt

Mostafa

Nady

Gomaa

et al. 2023

Water Air Soil Pollut

View full text Add to dashboard Cite

Wadi Abu Subeira area contains many farms and houses and is one of the promising areas for iron mining. Therefore, 21 surface soil samples were collected and investigated for toxic heavy metals (Pb, Cr, Ni, Cu, Zn, Co, and As) using inductively coupled plasma (ICP) to establish a geochemical baseline for these metals during pre-mining conditions. To decipher the sources of these metals and their interrelationships, multivariate statistical analysis was applied, while to evaluate the degree of pollution and potential environmental risks the environmental indices were used. Abundances of Pb, Cr, Ni, Cu, Zn, Co, and As fluctuated from 17.72 to 0.06, 47.12 to 10.86, 47.88 to 9.25, 45.04 to 6.23, 51.93 to 17.82, 10.55 to 1.24, and 7.04 to 1.66 mg/kg, respectively, displaying a declining trend of Zn > Cr > Ni > Cu > As > Co > Pb. Additionally, the mean concentrations of all studied metals were found to be significantly lower than the selected international reference standards. Pearson correlation coefficient, principal component analysis, and cluster analysis revealed two geogenic geochemical associations for the studied toxic elements: (1) Zn-As-Ni-Cr-Cu-Co; and (2) Pb. Negative Igeo values were observed for all metals, which showed that the samples were uncontaminated and can be considered a geochemical baseline for the study area. Moreover, all CF values were lower than or close to 1, suggesting low contamination levels from all studied metals and supporting the association with natural geological processes. Similarly, Er and RI values of all metals were below 40 and 150, respectively, indicating a low-risk environment. Ultimately, the obtained levels of the studied metals can be used as a geochemical baseline for tracking the future changes in their accumulations in soil sediments considering the current assessment of the area as an environmentally safe area.

show abstract

Ecological risk assessment of potentially toxic elements in the bottom sediments of a stream in Oke-Ere, Kogi State, North Central Nigeria

Obayomi

Sulaiman

Oluwasola

et al. 2023

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Heavy Metals Signature in Stream Sediments at Eséka Gold District, Central Africa: A Pre-mining Environmental Assessment

Cited by 5 publications

References 70 publications

RHIZOPHORA MANGLE as a Bioindicator of Environmental Exposure to Heavy Metals in the Navachiste Lagoon Complex, Sinaloa, Mexico

RHIZOPHORA MANGLE as a Bioindicator of Environmental Exposure to Heavy Metals in the Navachiste Lagoon Complex, Sinaloa, Mexico

Geochemical Baseline and Pre-Mining Environmental Assessment of Heavy Metals at Iron Exploration Area, Northeastern Aswan, Egypt

Ecological risk assessment of potentially toxic elements in the bottom sediments of a stream in Oke-Ere, Kogi State, North Central Nigeria

Contact Info

Product

Resources

About