Temporal variability of selected heavy metals in automobile soils

Onweremadu, E. U.; ., E.T. Eshett; Osuji, G. E.

doi:10.1007/bf03325959

Cited by 19 publications

(12 citation statements)

References 9 publications

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“…Soils are sandy due to their parent material origin and act as a filter (Donahue, et al, 1990) as labile Cd is leached away from the pedosphere. Soils of the study area are porous (Onweremadu, et al, 2007) and given high r ain fall amount of South eastern Niger ia (Onweremadu, 2006), the concentrations of Cd in both polluted and unpolluted soils are low as tr an slocator y pedogen ic pr ocesses, such as elviation resulted in losses in the soilsphere. However, ground-and surface-water assessment of the site was n ot conducted to ascer tain Cdconcentrations as it is suspected that lost Cd in studied soils may have caused non-point-source Cdpollution in the area.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Cd concentration of crude oil polluted arable soils

Onweremadu

Duruigbo

2007

Int. J. Environ. Sci. Technol.

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Thirty soil samples were analyzed for their properties and cadmium concentration in polluted and unpolluted sites of Isikwuato, Abia State, Nigeria. Polluted soils were more acidic (pH = 4.38) than unpolluted ones (pH = 5.22). Bulk density increased in polluted soils (1.51 g/cm 3 ). Higher average value of organic matter was recorded in polluted soils (mean value = 1.42 %) unlike 0.98 % found in unpolluted soils. Cadmium concentration was higher in polluted soils (0.76 mg/kg) contrasting with 0.02 mg/kg obtained in their unpolluted counterparts. Good relationship existed between exchangeable acidity and cadmium status in polluted soils (R = 0.83, R 2 = 0.77, N = 30) as opposed to values in unpolluted soils (R = 0.58, R 2 = 0.49, N = 30).

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Section: Discussionmentioning

confidence: 99%

Assessment of Cd concentration of crude oil polluted arable soils

Onweremadu

Duruigbo

2007

Int. J. Environ. Sci. Technol.

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“…The variation in percent clay among the soils studied could be attributed to land use history, the intensity of cultivation. On this subject Onweremadu et al (2007) noted slight temporal textural differences in arable soils resulting from continuous (2003), very strongly acidic soils accounted for 58%, while 42% of the studied soils could be categorized as strongly acidic suggesting the presence of substantial quantities of exchangeable hydrogen and aluminum ions which are associated with acidity ( Table 2). The cation exchange capacity of the studied soils ranged from 21.15 to 36.03 cmol c kg −1 .…”

Section: Physicochemical Properties Of the Studied Soilsmentioning

confidence: 93%

Phosphorous status and adsorption characteristics of acid soils from Cheha and Dinsho districts, southern highlands of Ethiopia

et al. 2018

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Background: Though soils in the study areas are characterized by higher iron and aluminum oxides, and low available P contents, study on P adsorption characteristics is limited. The purpose of this experiment was to evaluate adsorption properties of selected soils and determine the standard phosphorous requirements of the soils. In this experiment, separately weighed 2 g soil samples were equilibrated in 50 ml of 0.01 M CaCl 2 solution containing KH 2 PO 4 at rates of 0, 1, 2.0, 4.0, 8.0, 16.0, 24.0, and 32.0 mg P L −1 .Results: The Freundlich model was found to be the best model for the description of the P adsorption characteristics of the soils. The Freundlich coefficient K f ranged from 123.32 to 315.31 mg P kg −1 . The Goha-1 soil had the highest K f (315.31 mg P kg −1 ) as Ketasire had lowest K f (123.32 mg P kg −1 ) values. The value of SPR f was ranged from 50.50 to 154.02 mg P kg −1 for soils of the study area. Highly significant (P ≤ 0.01) correlation was observed between the Freundlich adsorption parameters and soil physicochemical properties. Conclusion:The standard P requirement of the studied soils was higher than the blanket P fertilizer rate recommendations in Ethiopia. Lack of inadequate knowledge about internal and external P requirement of each crop might have decreased yield in the study areas as it could have resulted in under-application of fertilizer P. The presence of high correlation between the adsorption parameters and the soil properties suggested the indices' prominent role in explaining P adsorption characteristics of the soils. Since higher dose of P is required by soils in the study area because of fixation, alternative P management strategies is needed to reduce P adsorption and enhance P availability. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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“…Bulk density was significantly higher (P<0.05) in rainy season in all the studied landuse, being 1.23-1.37 g/cm 3 CCS; 1.33-1.37 g/cm 3 in FS; 1.29-1.33 g/cm 3 in POS and 1.41-1.39 g/cm 3 in BF The values of bulk density were in line with the ranges documented by Landon (1991) for tropical soils. Onweremadu et al (2007), Achmad et al (2003) and Scot et al (1994) found higher bulk densities during rainy season. Seasonal changes in bulk density are attributed to heavy annual rainfall that lasts for about 9 months and estimated to be 2500 mm thus clogging the pore spaces (Oti, 2002).…”

Section: Resultsmentioning

confidence: 88%

Seasonal Dynamics of Soil Organic Matter and Total Nitrogen in soils under different land uses in Owerri Southeastern Nigeria

Lc¹,

Osuji²,

Onweremadu³

et al. 2013

Agro-Sci.

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ABSTRACT:The study investigated seasonal dynamics of soil organic matter and total nitrogen in soils affected by different land use types in Owerri, Southeastern Nigeria. A total of 72 soil samples were randomly collected at two monthly intervals in the dry season (October/November, December/January and February/March) and rainy season (April/May, June/July and August/September) at 0-20 cm depth in all the studied land uses, namely soils under continuous cassava cultivation (CCS), pineapple orchard soil (POS), bush fallow (FS) and bare fallow (BF.) . Collected soil samples were air dried, passed through 2mm sieve and were analysed using standard methods. The experiment was factorially arranged in randomized complete block design (RCBD), with three factors namely, season, month and landuse. The treatments were replicated three times. Generated soil data were analysed using analysis of variance (ANOVA) and significant means were separated using least significant difference (LSD) at 5% probability. Results showed that soil organic matter and total nitrogen were significantly higher (P<0.05) in the dry season especially between January and April compared to the rainy season where the least was found around June/July in all the studied land uses, although in all cases, their variability was minimal, ranging from 30.

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Temporal variability of selected heavy metals in automobile soils

Cited by 19 publications

References 9 publications

Assessment of Cd concentration of crude oil polluted arable soils

Assessment of Cd concentration of crude oil polluted arable soils

Phosphorous status and adsorption characteristics of acid soils from Cheha and Dinsho districts, southern highlands of Ethiopia

Seasonal Dynamics of Soil Organic Matter and Total Nitrogen in soils under different land uses in Owerri Southeastern Nigeria

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