Diatomite: Its Characterization, Modifications and Applications

Elden, Hossam; Morsy, Galal; Bakr, M.

doi:10.3923/ajmskr.2010.121.136

Cited by 114 publications

(21 citation statements)

References 70 publications

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“…The results of the chemical analysis of the materials (Table 2) indicate that the main compounds present in D and SCBA are silica and alumina, with low traces of CaO and MgO. Similar results were reported by Wen-Tien et al, 2004;Galal Morsy, 2010;Chargas-Cordeiro et al, 2009. The sum of major oxides is higher than 70%; therefore, the materials have pozzolanic potential (ASTM, 2012) and can react in an alkaline environment created by C (Malhotra and Ramezanianpour, 1994).…”

Section: Characterization Of the Materialssupporting

confidence: 61%

Manufacturing of Granular Matrix with Diatomacious earth, Lime and Sugarcane Bagasse ash to Encapsulate Entomopathogenic Nematodes (Steinernema glaseri)

Bustamante-Espinosa¹,

Castañeda-Ovando²,

Hernández-Ávila³

et al. 2020

American Journal of Agricultural and Biological Sciences

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An alternative for pest control in corn production is the use of biopesticides formulated with entomopathogenic nematodes encapsulated in granular matrices. However, it has been observed that the granular matrices´ lack of resistance to handling and transport causes their deterioration, therefore limiting their use. This study analyzes the use of lime and sugarcane bagasse ash as stabilizer additives in granular matrices made of diatomite earth in order to improve the survival rate of Entomopathogenic Nematodes. Six formulations were prepared and evaluated at 3, 12, 21 and 30 days of age. A total of 192 granular matrices were produced, 144 for axial compressive strength testing and 48 for the estimation of the survival rate of the nematodes. In order to carry out the last test, Steinernema glaseri nematodes were encapsulated. The results indicate that the granular matrices made with the combination of 88% diatomaceous earth plus 6% lime and 6% sugarcane bagasse ash have adequate hardness (mechanical strength) for handling and transportation purposes; in addition, at 30 days of age the survival rate was the highest obtained when compared to the granular matrices of all tested formulations.

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Section: Characterization Of the Materialssupporting

confidence: 61%

Manufacturing of Granular Matrix with Diatomacious earth, Lime and Sugarcane Bagasse ash to Encapsulate Entomopathogenic Nematodes (Steinernema glaseri)

Bustamante-Espinosa¹,

Castañeda-Ovando²,

Hernández-Ávila³

et al. 2020

American Journal of Agricultural and Biological Sciences

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“…On the other hand, diatomite promoted a significant increase in the CEC and availability of K and Mn contents. The increase in CEC may be due to the high porosity (35 -65%), high permeability, low density, small particle size, and high specific surface area of diatomite (Bakr, 2010). Therefore, it is capable of retaining water and cationic ions owing to its CEC > 50 cmol c kg -1 (Pati et al, 2016).…”

Section: Diatomite Effects On the Soil Chemical Characteristicsmentioning

confidence: 99%

Biomass and concentration of nutrients and silicon in sugarcane grown on soil fertilized with diatomite

Oliva

Nascimento

Silva

et al. 2020

Agraria

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Silicon (Si) plays an important role in sugarcane, but there is a gap of information regarding the potential of diatomite as a Si fertilizer to this crop. Here, we assessed the effects of five rates (equivalents to 75; 150; 225; 300 and 375 kg ha-1 Si) of a diatomite-based fertilizer on the biomass yield and concentration of nutrients and Si in sugarcane plants grown on a sandy soil. The efficiency of the extractants acetic acid and calcium chloride in predicting Si uptake was also assessed. Results showed that diatomite was efficient in supplying available Si in the soil and increased Si concentration in the plant. The addition of diatomite significantly increased the available contents of P, K, Mn, Cu, and the cationic exchangeable capacity of the soil. The concentrations of N, P, Mn, Cu, and Zn in shoots were elevated, suggesting that the fertilizer can play a role in the efficient use of nutrients by sugarcane. The extractant 0.01 mol L-1 CaCl 2 was better correlated with Si concentration in plants than 0.5 mol L-1 acetic acid. Therefore, CaCl 2 is the recommended extractant to estimate Si availability because of its higher efficiency and lower cost.

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“…La diatomita forma parte del grupo de rocas silíceas sedimentarias, que posee los siguientes rasgos característicos: (1) presencia de sílice amorfo activo SiO2, (2) estructura de finos poros, (3) ligereza y (4) baja conductividad térmica (Galal Mors, 2010; Ivanov y Belyakov, 2008; Loganina et al 2014). Las tierras diatomeas están constituidas por restos de esqueletos fosilizados de diatomeas, un tipo de algas unicelulares de origen acuático (Arik, 2003;Galal Mors, 2010;Loganina et al, 2014;Paschen, 1986). La diatomita se utiliza desde hace miles de años, pero en los últimos 200 años, se ha producido un incremento en su uso y una extracción a escala comercial (Flower, 2013).…”

Section: Método a Fundamento Teóricounclassified

Fabricación De Ladrillos Macizos Con Diatomeas Calcinadas

Pico

Carrasco

2019

1390-1117

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Los ladrillos cerámicos son elementos utilizados en albañilería fabricados a base de arcilla con o sin arena, agua y sometidos a un proceso de cocción a una temperatura determinada. Sin embargo, en su fabricación es posible añadir otros elementos en la dosificación para mejorar el producto. Uno de estos son las diatomeas.Primero se caracterizaron las arcillas (SI-01) adquiridas en Catamayo-Loja y diatomeas calcinadas (MG) procedentes de México. Mediante ensayos de clasificación de suelos, físicos, mecánicos, fluorescencia y difracción de rayos X. También, se realizó una microscopía electrónica de barrido a las diatomeas.Posteriormente se elaboraron varias dosificaciones hasta encontrar la mezcla óptima. Para ello se realizaron ensayos de tracción indirecta con la finalidad de encontrar la mezcla con menor densidad y mayor resistencia mecánica.Finalmente, se fabricaron ladrillos con la mezcla óptima, cocidos a 950°C, que fueron caracterizados mediante ensayos físicos y mecánicos. Estos resultados fueron comparados con los obtenidos de ladrillos artesanales fabricados con la misma arcilla.Los resultados mostraron que la mezcla óptima corresponde a la proporción 70/30 (SI-01/MG). El valor de resistencia a compresión simple fue 12.65MPa, la porosidad total fue 56.93%, el porcentaje de absorción de agua fue 44.83% y la densidad aparente fue 1.08g/cm3.

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Diatomite: Its Characterization, Modifications and Applications

Abstract: The review tackles common diatomite, its characterization, modifications and its composites, heavy metal toxicity and its immobilization techniques using diatomite, other important applications of diatomite.

Cited by 114 publications

References 70 publications

Manufacturing of Granular Matrix with Diatomacious earth, Lime and Sugarcane Bagasse ash to Encapsulate Entomopathogenic Nematodes (Steinernema glaseri)

Manufacturing of Granular Matrix with Diatomacious earth, Lime and Sugarcane Bagasse ash to Encapsulate Entomopathogenic Nematodes (Steinernema glaseri)

Biomass and concentration of nutrients and silicon in sugarcane grown on soil fertilized with diatomite

Fabricación De Ladrillos Macizos Con Diatomeas Calcinadas

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