Total concentration, speciation, source identification and associated health implications of trace metals in Lemna dumpsite soil, Calabar, Nigeria

Ebong, Godwin Asukwo; Dan, Emmanuel; Inam, Edu; Offiong, Nnanake‐Abasi O.

doi:10.1016/j.jksus.2018.01.005

Cited by 22 publications

(21 citation statements)

References 56 publications

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“…Fe recorded the highest DI rate for both the children and adults, whereas the lowest rate was recorded by Cr. This is consistent with the report by Ebong et al 103 for Fe in Lemna dumpsite soil. The high DI recorded by Fe may not be harmful because the metal is vital for life, but its availability should be monitored to avoid toxicity along food chain.…”

Section: Resultssupporting

confidence: 94%

“…The trends for the several fractions of Zn in the studied soils and control site are OX > RED > AEX > RES and RES >> RED > AEX > OX, respectively. Cu also existed principally in the oxidizable fraction which is in agreement with the results by Svendsen et al 102 and Ebong et al 103 This could be the consequence of the high tendency of OM in forming stable complexes with organic substances in soil. 104,105 Nevertheless, Cu existed mostly in the residual fraction in the control site.…”

Section: Sequential Extraction Of Metals Anthropogenic and Lithogenic Fractions Of Metalssupporting

confidence: 91%

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Impact of Abattoir Wastes on Trace Metal Accumulation, Speciation, and Human Health–Related Problems in Soils Within Southern Nigeria

Ebong

Ettesam

Dan

2020

Air, Soil and Water Research

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The slaughtering of animals and processing of meats for human consumption generates enormous wastes which are not properly managed in most developing nations including Nigeria. Majority of people in Akwa Ibom state in southern Nigeria depend on meat as their major source of protein, and abattoir wastes are applied in farms as organic manure by some farmers. This study examined the role of abattoir-related waste products in the physicochemical properties, total metal, and metal speciation of the soil. The data obtained were also subjected to some treatments using some environmental models to establish the degree of contamination by the parameters determined, studied locations, and the associated human health problems. Samples were collected from 5 designated abattoirs in Akwa Ibom state. Thirty composite samples were used for the research. Results obtained showed higher levels of pH, electrical conductivity, organic matter, and cation exchange capacity in the abattoir waste–impacted soils than in the control plot. Levels of pseudo total heavy metals were also higher in the studied soils than in the control plot. The mean values of the metals are below 400, 85, 140, 36, 100, and 35 mg/kg of recommended limits for Fe, Pb, Zn, Cu, Cr, and Ni, respectively by the Federal Environmental Protection Agency (FEPA) in Nigerian soil. The results also revealed that Fe and Cr existed mainly in residual fraction. However, Zn, Cu, and Ni existed principally in the form bound to organic matter/sulfide. In addition, we detected that Pb existed mainly in the reducible fraction. Disparities were also observed in the speciation results of the metals between the studied soils and the control plot. Principal component analysis (PCA) indentified that both the geogenic and anthropogenic factors contributed to the accumulation of metals determined in the studied soils. Variable relationships were also observed for the heavy metals determined in the studied soils. Fe showed a high-risk potential, and children were more vulnerable due to its toxicity. We conclude this study was able to expose the consequences of indiscriminate dumping of abattoir wastes on the quality of soil and the associated human health problems.

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Section: Resultssupporting

confidence: 94%

Section: Sequential Extraction Of Metals Anthropogenic and Lithogenic Fractions Of Metalssupporting

confidence: 91%

Impact of Abattoir Wastes on Trace Metal Accumulation, Speciation, and Human Health–Related Problems in Soils Within Southern Nigeria

Ebong

Ettesam

Dan

2020

Air, Soil and Water Research

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“…The results indicate that the variations in the concentrations of heavy metals between 98 and 99% can be attributed to the variation in the OM content of the dumpsite soils. The observation that soil OM is a dominant variable affecting the spatial distribution of heavy metals is consistent with well-investigated findings [14][15][16]31]. Udosen [27] opined that the formation of OM and heavy metal ionic compounds reduces heavy metals bioavailability and mobility and thus, decreasing the activity of the heavy metal ions thereby leading to increased levels of heavy metals accumulation in the soil.…”

Section: Correlation Analysis (Ca)supporting

confidence: 88%

Identification of heavy metals source within selected active dumpsites in southeastern Nigeria

Onwukeme

Eze

2021

Environ Anal Health Toxicol

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Discriminating contaminant sources is crucial for pollution control. The study aimed at identifying the source(s) of heavy metals in active dumpsite soils from selected areas in Southeastern Nigeria using statistical tools. The dumpsites were Enyimba dumpsite Aba (dumpsite-1), Okpuno-Egbu dumpsite Nnewi (dumpsite-2), Rice mill dumpsite Abakaliki (dumpsite-3) and Nekede dumpsite Owerri (dumpsite-4) in Abia, Anambra, Ebonyi and Imo State respectively. After standard sampling, elemental analysis was carried out using an energy dispersive x-ray fluorescence spectrometer; Chromium (Cr), Manganese (Mn), Cobalt (Co), Iron (Fe), Nickel (Ni), Copper (Cu), Zinc (Zn), Arsenic (As), Lead (Pb) and Cadmium (Cd) were quantified and results showed they were present in high concentrations above control and standard values set by the National Environmental Standards and Regulations Enforcement Agency (NESREA) and the Food and Agriculture Organization of the United Nations (FAO) / World Health Organization (WHO). Metals investigated exhibited variable correlations among themselves suggesting potential multi-element contamination, while soil organic matter (OM) and pH displayed both significant positive and negative influence on the metal availability in the studied soils. Test of significance of the observed correlation were positive and significant (r > 0.9 at p < 0.05/0.01) for Cr/Co, Cr/Fe, Mn/Co, Co/Fe, Cu/Zn, Zn/Pb, Cu/As, Cu/Pb, Zn/As, As/Pb in dumpsite-1; in dumpsite-2, only Ni/Cu; in dumpsite-3, Fe/OM and Cd/OM while in dumpsite-4,Co/Fe, Cu/As, Cu/Pb, Zn/Cd, Ni/OM, and As/Pb. Hierarchical cluster analysis (HCA) and Principal component analysis (PCA) extracted two to three components/groups based on square Euclidean distance and eigenvalues > 1, confirming sources to be from organic pigments in plastics, scrap metals and incinerated biodegradable wastes. This study concludes that statistical methods can provide a scientific basis for monitoring heavy metals accumulation in dumpsite soils.

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“…These elements persist in soils and do not undergo microbial degradation (Greger, 2005). Plants grown on contaminated soils absorb and accumulate PTEs within the different plant parts and this might possess potential health risks for man and animals feeding on these plants (Khan et al, 2008, Ibrahim et al, 2016Abbas and Abdelhafez, 2014;Abdelhafez et al, 2015;Ebong et al, 2018). Accordingly, monitoring the level of contaminants in soil periodically is essential to ensure safe environmental and ecological use of this natural resource.…”

Section: Introductionmentioning

confidence: 99%

Implications of long term irrigation with wastewater on the contents and retention kinetics of potentially toxic elements in Typic Torripsamment soils

Abbas

Bassouny

2018

Egypt.J. Soil Sci.

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Total concentration, speciation, source identification and associated health implications of trace metals in Lemna dumpsite soil, Calabar, Nigeria

Cited by 22 publications

References 56 publications

Impact of Abattoir Wastes on Trace Metal Accumulation, Speciation, and Human Health–Related Problems in Soils Within Southern Nigeria

Impact of Abattoir Wastes on Trace Metal Accumulation, Speciation, and Human Health–Related Problems in Soils Within Southern Nigeria

Identification of heavy metals source within selected active dumpsites in southeastern Nigeria

Implications of long term irrigation with wastewater on the contents and retention kinetics of potentially toxic elements in Typic Torripsamment soils

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