Physical and chemical characteristics of polymer coatings in CRF formulation

Tomaszewska, Maria; Jarosiewicz, Anna; Karakulski, Krzysztof

doi:10.1016/s0011-9164(02)00501-5

Cited by 94 publications

(56 citation statements)

References 5 publications

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“…Ao absorver os nutrientes, as raízes causam uma depleção na concentração dos nutrientes nas proximidades da zona radicular induzindo um sistema de liberação de nutrientes por osmose. A taxa de liberação dos nutrientes encapsulados é mais alta em temperaturas mais elevadas coincidindo com o período de crescimento mais ativo das plantas (SHAVIT et al, 1997;TOMASZEWSKA et al, 2002).…”

Section: Introductionunclassified

Sistema de blocos prensados e doses de adubo de liberação lenta na formação de porta-enxerto cítrico

et al. 2006

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Section: Introductionunclassified

Sistema de blocos prensados e doses de adubo de liberação lenta na formação de porta-enxerto cítrico

et al. 2006

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“…Este resultado pode ser explicado devido aos benefícios dos fertilizantes de liberação lenta, como diminuição de perdas de nutrientes por lixiviação e a mortalidade de plantas por choque de plantio. Os fertilizantes de liberação lenta induzem um sistema de liberação por osmose, e a taxa de liberação é alta em maiores temperaturas, ou seja, coincidindo com o período de crescimento mais ativo das plantas (TOMASZEWSKA et al, 2002).…”

Section: Tabela 2 Desempenho Da Variável Diâmetro Do Colo Em Mudas Deunclassified

INFLUÊNCIA DE DIFERENTES SUBSTRATOS NA PRODUÇÃO DE Peltophorum dubium

Szareski¹,

Souza²,

Nardino³

et al. 2015

Enciclopédia Biosfera

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“…Suitable coating must have four properties, including low prices, being biodegradable, non-toxicity, and high availability. It could effectively resolve and improve nutrient efficiency while reducing the environmental hazards (Shavit et al 1997;Tomaszewska et al 2002). Many materials have been reported to be used as coatings, such as sulfur, polyethylene, polysulfone, polyvinyl chloride, polystyrene, polyacrylic acid latex, chitosan, starch, polyvinyl alcohol, mixture of gypsum, limestone, cement, sulfur, and zeolite (Blouin et al 1971;Salman 1989;Al-Zahrani 2000;Hanafi et al 2000;Jarosiewicz and Tomaszewska 2003;Liang and Liu 2006;Lan et al 2011;Mohd Ibrahim et al 2014;Eghbali Babadi et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Utilization of waste lignin to prepare controlled-slow release urea

Behin

Sadeghi

2016

Int J Recycl Org Waste Agricult

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Purpose The present work reports an economically attractive improvement in the area of producing particulate slow release nitrogen fertilizer using lignin as a waste effluent of pulp and paper manufacturing process. Methods An improved coating of modified lignin was applied on the surfaces of the individual urea particles. The Kraft and Sulfite black liquors obtained from two different paper pulping units and were used as sources of sulfate and sulfite lignin, respectively. Chemical modification of extracted lignin was performed through acetylation reaction by acetic acid/sodium metabisulfite to increase its hydrophobicity character. In a separate experiment, a thin layer of synthesized acetylated lignin was coated on granular urea by fluidized-bed technique. The nitrogen release of synthesized fertilizer in the water and soil was examined by the Kjeldahl method. Results The analysis of FTIR spectra indicated the changes in the functional groups of acetylated lignin. Petrographic photography and scanning electron microscopy (SEM) analyses demonstrated a uniform and homogeneous covering of the urea surface. The 7 day nitrogen release rate of urea coated by acetylated lignin in soil was obtained 36.3 and 45.3 % for Kraft and Sulfite lignin, respectively, whereas this value was 59 % for sulfur coated urea. Conclusions Using industrial wastewater as source of lignin gives satisfactory results for industrial applications and yields a quality green fertilizer product with reduced operation difficulties while considerably preserving the environment.Keywords Controlled release fertilizer Á Fluidized-bed coating Á Kraft and sulfite liquor Á Modified lignin coated urea Abbreviations CRF Controlled-release fertilizers FTIR Fourier transform infrared SCU Sulfur coated urea SEM Scanning electron microscopy

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Physical and chemical characteristics of polymer coatings in CRF formulation

Cited by 94 publications

References 5 publications

Sistema de blocos prensados e doses de adubo de liberação lenta na formação de porta-enxerto cítrico

Sistema de blocos prensados e doses de adubo de liberação lenta na formação de porta-enxerto cítrico

INFLUÊNCIA DE DIFERENTES SUBSTRATOS NA PRODUÇÃO DE Peltophorum dubium

Utilization of waste lignin to prepare controlled-slow release urea

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