Application of the Walkley–Black titration for the organic carbon quantification in organic rich sedimentary rocks

Gelman, Faina; Binstock, Ruth; Halicz, Ludwik

doi:10.1016/j.fuel.2011.12.053

Cited by 104 publications

(50 citation statements)

References 11 publications

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“…The Walkley-Black procedure was used to measure the organic matter (OM) content of the soil samples. 26 Cation exchange capacity (CEC) of the soils was determined using method 9081.…”

Section: Physical and Chemical Properties Of Shooting Range Soilsmentioning

confidence: 99%

Lead pollution of shooting range soils

et al. 2017

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“…The Walkley-Black procedure was used to measure the organic matter (OM) content of the soil samples. 26 Cation exchange capacity (CEC) of the soils was determined using method 9081.…”

Section: Physical and Chemical Properties Of Shooting Range Soilsmentioning

confidence: 99%

Lead pollution of shooting range soils

et al. 2017

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“…Total solid was determined using the method of Meynell (1982). The carbon content was determined as reported by Gelman et al (2011). Free fatty acid was determined using the method of AOAC (2010).…”

Section: Description Of Digester Assembly and Biogas Productionmentioning

confidence: 99%

Design and fabrication of 3.60 m3 household plastic bio digester loaded with kitchen waste and cow dung for biogas generation

Nwankwo¹,

Eze²,

Okoyeuzu³

2017

Sci. Res. Essays

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A 3.6 m 3 pilot plastic digester for family generation of biogas was designed, constructed and evaluated through physico-chemical studies using 50% cow dung and 50% kitchen wastes. The ash content of waste increased after digestion while the fibre and fat contents of the waste was 5.10 and 1.05% but significantly (p<0.05) decreased to 2.49 and 0.70% after digestion. The carbohydrate content of the waste was 11.02% which significantly (p<0.05) decreased to 7.91%. The volatile solid content of 50% cow dung + 50% cassava peel + yam peels + vegetable was 11.10%. The biochemical oxygen demand was 44.58% while the chemical oxygen demand was 139.20% before digestion but decreased significantly (p<0.05) after digestion. The pH of 50% cow dung + 50% cassava + yam peels + vegetable waste during digestion increased from 6.71 at day of charging to 6.81 at the 8th day after which it began to fluctuate between 6.68 and 6.85 throughout the retention period. Afternoon temperatures of both ambient and slurry were within the mesophilic (30 and 40°C) temperature which was higher than the morning and evening temperatures. The production of biogas started at the 2nd day by producing 406 L and increased each day till day 8, by producing 738 L and after which its production began to fluctuate between 572 and 718 L/day. Early biogas flammability was observed on the 4th day for 50% cow dung + 50% cassava + yam peels + vegetable. At the point of flaming, the methane content of the biogas increased significantly (p<0.05) to 65.65%, while the carbon dioxide decreased significantly (p<0.05) to 25.15%, for 50% cow dung + 50% cassava + yam peels + vegetable. The average biogas (0.601 to 0.505 m 3 /day) produced from the waste using 3.6 m 3 capacity plastic bio-digester could be sufficient to cook three times a day for household of 3 to 4 persons.

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“…Texture affects the ability of the soil to retain the organic matter. Gelman et al [16] observed that the concentration of organic matter was greater in the fractions of fine silt and clay.…”

Section: Descriptive Analysismentioning

confidence: 98%

“…Electrical conductivity (EC) was carried out with a multiparameter (Toledo, Seven Excellence) based on methodology proposed by Chi & Wang [15]. Organic matter (OM) was determined by the Walkley & Black method [16], inorganic nitrogen (Ninor) by distillation in micro-Kjeldahl [17] and available phosphorus (Pava) according to Bray and Kurtz method [18]. In addition, atomic absorption spectrometry with an Agilent Technologies 200 Series AA equipment were used for soil samples in order to determine the following elements [19]: sodium (Na), potassium (K), calcium (Ca), magnesium (Mg), Iron (Fe), manganese (Mn), zinc (Zn), copper (Cu).…”

Section: Sampling and Analysis Of Soil Quality Indicatorsmentioning

confidence: 99%

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Robust Soil Quality Index for Tropical Soils Influenced by Agricultural Activities

Rangel‐Peraza¹,

Padilla-Gasca²,

López-Corrales³

et al. 2017

JACEN

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The knowledge of the soil quality plays a vital role in the agricultural sector. Despite its importance, there is scarce scientific information concerning this regard. The objective of this research is to develop a methodology to identify and select the most appropriate indicators of Soil Quality Index (SQI) in a region with high agricultural activity. For its conformation, a descriptive statistical analysis and a Pearson correlation matrix were performed and the indicators that showed greater variation were identified using a Principal Components Analysis (PCA). A sensitivity analysis was carried out and the most sensible soil indicators of SQI were identified. This statistical procedure was also used to specify the weights of the indicators in SQI. The variables resulting from the multiparametric statistical analysis were pH, organic matter, sodium, calcium, iron, zinc, cation exchange capacity and electrical conductivity. The robustness of the SQI obtained in this study was demonstrated through simulations carried out by the numerical optimization through simplex method. The Soil Quality Index range obtained (0.54 -0.75) locates Culiacan Valley soils as moderate/high quality.

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Application of the Walkley–Black titration for the organic carbon quantification in organic rich sedimentary rocks

Cited by 104 publications

References 11 publications

Lead pollution of shooting range soils

Lead pollution of shooting range soils

Design and fabrication of 3.60 m3 household plastic bio digester loaded with kitchen waste and cow dung for biogas generation

Robust Soil Quality Index for Tropical Soils Influenced by Agricultural Activities

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