DETERMINING THE pH OF ACID SOILS

Davey, B. G.; Conyers, Mark

doi:10.1097/00010694-198809000-00001

Cited by 43 publications

(18 citation statements)

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“…The digested samples were analysed for the metals using Atomic Absorption Spectrophotometer, Pye Unicam model Sp-2900. Soil pH was measured in a soil water ratio of 1:2 (Davey and Conyers 1988). Total Organic Carbon(TOC) was determined by the method described by Nelson and Somers(1982) while Electrical conductivity was determined by the method of Chopra and Kanzar(1988).…”

Section: Methodsmentioning

confidence: 99%

Physicochemical Characteristics and Levels of Some Heavy Metals in Soils around Metal Scrap Dumps in Some Parts of Delta State, Nigeria

Akpoveta¹,

Osakwe²,

Okoh³

et al. 2011

Journal of Applied Sciences and Environmental Management

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Some physicochemical characteristics and heavy metal levels in soil samples around metal scrap dumps at Abraka and Agbor vicinities of Delta State, Nigeria, were analysed in order to assess the effects of the dumps on the soils. Conventional analytical methods were employed for the determination of these physicochemical parameters while heavy metals in the soil samples where analysed using Atomic Absorption Spectrophotometer. The results of the physicochemical analysis showed that the pH values in all the sites ranged from 7.01 to 7.99 indicating neutrality to slight alkalinity of the soils. The Total Organic Carbon values ranged from 0.38 to 0.54% indicating presence of some organic matter and some microbiological activities in the soil samples. The high conductivity values ranging from 165 to 201µs/cm indicated significant presence of some soluble inorganic salts in soils studied. For all the physicochemical values recorded, the soil samples at Agbor had slightly higher values than those of Abraka. The heavy metal levels for the soils in Abraka and Agbor respectively were (mgkg -1 ) 1.50 and 1.52 for Cd, 5.10 and 4.48 for Ni, 1431 and 1411 for Fe, 74.26 and 97.21 for Zn, 14.31 and 34.21 for Cu, 24.0 and 18 for Cr, 9.73 and 10.54 for Co, and then 12.24 and 14.47 for Pb. The levels were all higher than those recorded in the control sites. A consistent trend showing a decrease in the concentration of heavy metals was observed for soil samples at increased distances from the impact points for the two towns studied. Metal was observed for soil samples at increased distances from the impact point for the two towns studied. The results from the contamination index indicated a significant degree of soil contamination for Pd, Cd, Co, Cu and Zn in the soils studied showing a higher degree of contamination for these metals. These soils therefore constitute a major health risk to the local population. This study successfully related and attributed the presence of heavy metals with anomalous concentration in the soils to anthropogenic inputs from the metal scrap dumps. @JASEM.

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Section: Methodsmentioning

confidence: 99%

Physicochemical Characteristics and Levels of Some Heavy Metals in Soils around Metal Scrap Dumps in Some Parts of Delta State, Nigeria

Akpoveta¹,

Osakwe²,

Okoh³

et al. 2011

Journal of Applied Sciences and Environmental Management

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“…Analysis of the soil pH: Soil and rumen waste samples were collected, and their pH were measured according to the method of Davey and Conyers (1988). For this, 20 g of air dried samples were weighed and mixed with 20 mL of distilled water in a 50 mL beaker.…”

Section: Materials and Methordsmentioning

confidence: 99%

Glutathione-S-Transferase Production in Earthworm as Tool for Assessment of Heavy Metal Pollution in Abattoir Soil

Owagboriaye

Dedeke

Ademolu

2016

RBT

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Abstract:The use of direct response of animals to environmental challenges by production of biomarkers is a better tool to assess environmental pollution than the conventional methods. This study aimed to measure Glutathione-S-transferase (GST) in earthworms as tools for assessing heavy metal pollution in abattoir soil. Five (5) replicates each of earthworm species (Libyodrilus violaceous, Eudrilus eugeniae and Alma millsoni), soil and rumen waste samples were collected from three (3) abattoir sites (Lafenwa, Gbonogun and Madojutimi abattoirs), and a control site located within Federal University of Agriculture Abeokuta, beside an undisturbed stream with no rumen waste. Heavy metal (Cu, Zn, Pb, Cd, Co, Cr, Ni and Mn) concentrations in rumen waste, abattoir soils and earthworm tissues were determined using Atomic Absorption Spectrophotometer. The pH and organic matter (OM) concentrations of the rumen waste and abattoir soils were determined by standard methods. GST activities in the earthworm tissues were determined through the conjugation of 1 mM reduced glutathione (GSH) with 1 mM 1-chloro-2,4-dinitrobenzene (CDNB). The rumen waste recorded significantly higher (p ≤ 0.05) % OM, heavy metal concentrations and pH level than in their respective abattoir soils. The mean heavy metal concentrations of Cu, Zn, Pb, Cd and Mn were highest in the tissue of earthworm species obtained from Lafenwa abattoir. A significantly (p ≤ 0.05) higher GST activities were recorded in the tissue of earthworm species obtained from Lafenwa and Gbonogun abattoirs. Libyodrilous violaceus obtained from Lafenwa abattoir recorded the highest GST activity (8.47±1.39) in their tissue followed by the ones from Gbonogun abattoir (8.21±0.85). A significant (p ≤ 0.05) positive correlations was observed between GST activities in earthworm tissues and heavy metal concentrations. GST activities can therefore be used to assess the level of heavy metal pollution in abattoir soils. Rev. Biol. Trop. 64 (2): 779-789. Epub 2016 June 01.

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“…Soil pH was measured in a soil-water ratio of 1:2.5 [9] Total Organic Carbon (TOC) was determined by the method described by Nelson and Sommers, [10]. Total Nitrogen was analyzed using Micro-Kjeldahl method.…”

Section: Sample Analysismentioning

confidence: 99%

Evaluation of Physicochemical Characteristics of Soils in the Flood Disaster Affected Areas of Isoko Region of Delta State, Nigeria

Osakwe¹

2014

IOSRJAC

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DETERMINING THE pH OF ACID SOILS

Cited by 43 publications

References 0 publications

Physicochemical Characteristics and Levels of Some Heavy Metals in Soils around Metal Scrap Dumps in Some Parts of Delta State, Nigeria

Physicochemical Characteristics and Levels of Some Heavy Metals in Soils around Metal Scrap Dumps in Some Parts of Delta State, Nigeria

Glutathione-S-Transferase Production in Earthworm as Tool for Assessment of Heavy Metal Pollution in Abattoir Soil

Evaluation of Physicochemical Characteristics of Soils in the Flood Disaster Affected Areas of Isoko Region of Delta State, Nigeria

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