Environmental Quality Assessment: Geoenvironmental Indices

Монахов, С. К.; Esina, Olga; Monakhova, Galina A.; Tatarnikov, Vitaly

doi:10.1007/978-94-017-9499-2_27

Cited by 6 publications

(5 citation statements)

References 1 publication

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“…The background values used in this study was based on geometric mean as considered for assessing environmental risk 33,35 and medianmean that was recommended by Bhutiani et al, 33 Monakhov et al, 36 Sarala et al 37 These means have been used as background values for assessing ecological risks by Bhutiani et al, 33 Izah et al, [19][20][21][22] Aghoghovwia et al, 38 Hence this was adopted in this study.…”

Section: Establishment Of Background Valuesmentioning

confidence: 99%

Untitled

2020

BIJ

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This study evaluated the geochemical distribution and environmental risk of heavy metals such as cadmium, chromium, iron, zinc, nickel, copper and lead in the Taylor creek within the Niger Delta region of Nigeria. The sediment samples were analyzed by flame atomic adsorption spectrometry. The environmental risk was assessed via standard protocol, using two background scenarios (geometric and median mean). The distribution of heavy metals in the sediment was in the order; iron>zinc>chromium>lead>copper>nickel>cadmium. The cluster analysis, pollution load index, quantification of contamination and geoaccumulation index showed a higher degree of contamination for sediments of Obunagha 2, Okolobiri (1&2) and Ogboloma (1&2). All metals depicted a low risk index even though values were higher in Obunagha 2, Okolobiri (1&2) and Ogboloma (1&2), and lowest in Obunagha 1 and Polaku (1&2). Also, the ecological risk showed moderate contamination for cadmium in some locations. The findings of this study showed that anthropogenic activities along the bank of the Taylor creek is having an influence on the sediment heavy metals which is key in determining the survival rate of benthic fauna and other aquatic organism.

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Section: Establishment Of Background Valuesmentioning

confidence: 99%

Untitled

2020

BIJ

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“…This type of data is not readily available around sites used as dumpsites. Based on this, geometric mean was used as reference which have been considered for assessing environmental risk (Bhutiani et al, 2017;Thambavani and Uma Mageswari, 2013) and median value which has been recommended by Bhutiani et al (2017), Monakhov et al (2015), Sarala and Sabitha (2012). Typically, the use of median which is a measure of central tendency in place of arithmetic mean shows the main trend in the index values for management purpose (Izah et al, 2017b;Sarala and Sabitha, 2012).…”

Section: Median and Geometric Means Computationmentioning

confidence: 99%

Public Health Implications of Seasonality in Noxious Gases from Dumpsites in Some Niger Delta States, Nigeria

Richard¹,

Nwagbara²,

Weli³

2019

International Journal of Research Studies in Biosciences

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Weather is a global phenomenon caused by the unequal amounts of solar energy reaching the tilting earth's surface creating pockets of warm and cold air around the earth. The resultant difference in air temperature and pressure causes warm air to rise and cold air to sink creating wind which gives rise to variation in weather conditions around the planet. Weather is never stable. It varies over time and space. The same is true for climate, which is the average weather condition over a place and over a period of time. This brings about seasons. Seasonality in climate/weather is a major factor in the socioeconomic and political life style considerations of any nation. In Temperate regions, four seasons are recognizable: Summer, autumn, winter and spring while in Tropical regions like Nigeria two main seasons, dry and wet periods are predominant. The climatic features and variation in any region can be understood in terms of the various weather zones which constitute the major modules of the climate that are peculiar to the region, for instance in Nigeria harmattan (dry but humid weather) the steady rain and drizzle, the uproar line thunderstorms and the little dry season (Adejuwon, 2011). Adejuwon (2011), Ayoade (1974) reported that the various occurrence time, place, duration and intensity are determined by the location in relation to inter-tropical discontinuity. This brings about seasonality. The seasons in Nigeria is easily distinguished based on amount of rainfall, relative humidity and temperature. However, in recent times, it appears that these characteristics are gradually changing.

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“…Authors have recommended the use of geometric mean (Thambavani and Uma Mageswari, 2013;Bhutiani et al, 2017) and median mean (Monakhov et al, 2015;Bhutiani et al, 2017) as background values in assessment of environmental risk and it have been applied by Izah et al (2017c;. Hence, the background values including geometric mean (BGM) and median mean (BMM) was adopted in this study for the assessment of heavy metals level in 5 locations from cassava mill effluents contaminated soil analyzed in two predominant seasons (wet and dry) as reported by Izah et al (2017c) (Table 1).…”

Section: Data Sourcementioning

confidence: 99%

Effects of Environmental Factors on Seed Germination of <i>Salix linearistipularis</i>

Ma¹,

Xu²,

Qi³

et al. 2018

msb

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This study evaluated the ecological risk assessment of heavy metals in cassava mill effluents contaminated soil in rural community in the Niger Delta region of Nigeria. Secondary data was used for the ecological risk assessment. Two background scenarios i.e. geometric mean (BGM) and median mean (BMM) was used as the reference value. The heavy metals that were assessed for ecological risk include viz: Cr, Zn, Cu, Co, Ni, Mn, Pb and Cd. 50% of mean detected individual heavy metals were considered for the location that was not detected. Assessment of the ecological risk was carried out following well established protocol. The results of the potential ecological risk (ER), Ecological risk index (ERI) and Monomial potential ecological risk (MPER) of heavy metals showed low risk under both scenarios except for Cd in one of the locations that showed moderate risk for MPER under both background scenarios in wet season. The distribution of the heavy metals based on potential ecological risk were in the order; Cd > Ni > = Pb > Co > Cu> Cr > Mn = Zn (BMM) and Cd > Pb > Ni = Co > Cu = Cr > Mn > Zn (BGM) for wet season and Cd > Pb = Ni = Cu > Co > Cr > Mn = Zn (BMM) and Cd > Pb > Cu = Co > Ni > Cr > Mn = Zn for dry season. The study showed low ecological risk associated with cassava mill discharged into the environment.

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Environmental Quality Assessment: Geoenvironmental Indices

Cited by 6 publications

References 1 publication

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Public Health Implications of Seasonality in Noxious Gases from Dumpsites in Some Niger Delta States, Nigeria

Effects of Environmental Factors on Seed Germination of <i>Salix linearistipularis</i>

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