Using Pollution Load Index and Geoaccumulation Index for the Assessment of Heavy Metal Pollution and Sediment Quality of the Benin River, Nigeria

Ogbeibu, AE; Omoigberale, Michael O.; Ezenwa, Ifeanyi Maxwell; Eziza, Joyce O.; Igwe, Joy O.

doi:10.12966/ne.05.01.2014

Cited by 67 publications

(77 citation statements)

References 17 publications

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“…Similar low values from selected major rivers in Southwestern Nigeria have been documented by [29]. Extreme concentrations of organic carbon levels below 0.05% and above 3% have been implicated in decreased benthic abundance and biomass [2]. The mean organic content obtained in the sediments from the study were within the risk associated values recommended by [30].…”

Section: Discussionsupporting

confidence: 86%

“…Many environmentalists have use water as pollution indicator by contaminants including heavy metals, but sediment can provide a deeper insight into long-term pollution state of aquatic environment [22,2]. Sediments have been described as sink of pollutants whereby they concentrate according to the levels of pollution [23].…”

Section: Discussionmentioning

confidence: 99%

“…The sediments are formed either from allochthonous or autochthonous materials or from both. The materials ranged fine to coarse grain minerals [2]. Data from sediments provide information on the impact of distant human activity on the wider ecosystem.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Heavy Metals Associated with Bottom Sediment of Asejire Reservoir, Southwest Nigeria

Godwin

2016

ILNS

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ABSTRACT.A study on the characteristic of sediment quality of Asejire Reservoir was conducted to evaluate the heavy metal content of the reservoir. Twenty stations were selected, samples and analyzed using standard methods. The result showed that the sediment was slightly acidic across the study stations, with low conductivity and organic matter content. The heavy metals order of dominance was: Fe>Pb>Cu>Zn>Mn>Al>Ba>Ni>Cr. The mean concentration levels of all the heavy metals were lower than mean background value except Fe, Cu and Pb. However, calculated Enrichment Factor (EF) values for all the heavy metals investigated showed that they were less than 1.5 (<1.5), suggesting that the heavy metals were all derived mainly from natural sources such as bedrock materials and weathering processes.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

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Assessment of Heavy Metals Associated with Bottom Sediment of Asejire Reservoir, Southwest Nigeria

Godwin

2016

ILNS

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“…Thus, the physico-chemical characteristics, including levels of trace metals, of river waters determine the quality of the sediment [17,2]. The study area is typically located on an alluvial floodplain, which is characterised by inundation of the banks of the water bodies, particularly rivers and streams, as well as most of the adjourning farmlands.…”

Section: Spatial and Temporal Variabilitymentioning

confidence: 99%

“…Sediments embody the critical elements of an aquatic ecosystem; they are collections of fine-, medium-and coarse-grained minerals and organic particles that are found at the bottom of lakes, ponds, rivers, streams, bays, estuaries and oceans [1,2]. Fagbote and Olanipekun [3] have reported that the composition of sediments consequently provides the best natural archives of recent environmental changes.…”

Section: Introductionmentioning

confidence: 99%

Physico-chemical trends in the sediments of Agbede Wetlands, Nigeria

Dirisu

Olomukoro

Ezenwa

2017

Materials and Geoenvironment

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This study assessed the physico-chemical status of sediments in the Agbede Wetlands with the aim to create a reference archive for the Edo North catchment and to further identify the characteristics mostly influenced by the natural and anthropogenic activities going on at the watershed. Nutrients, zinc, nickel and lead were identified to be mostly of anthropogenic origin, while alkali metals and alkaline earth metals were from both anthropogenic and natural sources. The clustering of stations 1 and 4 indicates that the sediment quality in the lentic systems was not completely excluded from the lotic system, suggesting that principal component analysis (PCA) and cluster analysis (CA) techniques are invaluable tools for identifying factors influencing the sediment quality. The mean values of the particle size distribution were in the following order across the ecosystems: sand (61.86-80.53%) > silt (9.75-30.34%) > clay (7.83-13.89%). The contamination of the water bodies was primarily derived from agricultural run-offs and through geochemical weathering of the top soils. Therefore, our analysis indicates that the concentrations of cations, anions and nutrients in the sediments of the lotic and lentic ecosystems in Agbede Wetlands are not at an alarming level. PovzetekRaziskava obravnava fizikalnokemično stanje sedimentov v agbedskih mokriščih z namenom izdelati primerjalni arhiv severnega dela porečja Eda in natančneje opredeliti njegove značilnosti, na katere vplivajo naravni in antropogeni procesi v porečju. Ugotovili so, da so hranila, cink, nikelj in svinec pretežno antropogenega porekla, alkalne in zemeljskoalkalne kovine pa iz naravnih in antropogenih virov. Lega postaj 1 in 4 v razvrščevalnem diagramu nakazuje, da kakovost sedimenta v lentičnih sistemih ni povsem izključena iz lotičnega sistema, iz česar sledi, da so metode PCA in CA (metoda glavnih komponent in metoda razvrščanja v skupine) zelo uporabne za prepoznavanje faktorjev, ki odločajo o kakovosti sedimenta. Srednje vrednosti porazdelitve zrnavosti v ekosistemih so naslednje: pesek (61.86-80.53%), > melj (9.75-30.34%), > glina (7.83-13.89%). Viri onesnaženja vodnih teles so predvsem v izpiranju obdelovalne zemlje in geokemičnem preperevanju vrhnjih tal. Iz opravljene raziskave sledi, da ugotovljene koncentracije kationov, anionov in hranil v sedimentih lotičnih in lentičnih ekosistemov v agbedskih mokriščih niso kritične.

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