Nitrate occlusion studies in Y zeolite and in a clay pillared with aluminium oxide

Carvalho, Ana P.; Pires, João; Veloso, Patrı́cia; Machado, Manuel; Carvalho, M. Brotas de; Rocha, João

doi:10.1016/s1387-1811(02)00625-x

Cited by 8 publications

(5 citation statements)

References 28 publications

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“…After application to soil, a large proportion of urea hydrolyzes before being absorbed by plants. One method to develop CRFs reported in previous studies is the occlusion of chemical sources of nutrients in natural porous minerals or between layers of clay minerals [6][7][8][9][10]. Correspondence To eliminate this environmental concern, controlled release fertilizers (CRFs) have been used as an alternative for conventional fertilizers [1,3,4].…”

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confidence: 99%

Intercalation of urea into kaolinite for preparation of controlled release fertilizer

Mahdavi

Abdul

Khanif

2014

CI&CEQ

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Article Highlights• Urea was intercalated between elementary layers of kaolinite • Urea-intercalated kaolinite was characterized using, XRD, FTIR and CHNS methods • Urea-intercalated kaolinite was mixed with binder to prepare controlled release fertilizer granule • The nitrogen release property of granules was investigated using UV-Vis spectroscopy • Results showed that release property of granules conformed to the standard of controlled release fertilizers Abstract Urea was intercalated between layers of kaolinite by dry grinding technique to be used for preparation of controlled release fertilizer. X-ray powder diffraction (XRPD) patterns confirmed the intercalation of urea into kaolinite by the significant expansion of the basal spacing of kaolinite layers from 0.710 to 1.090 nm. Fourier transform infrared spectroscopy (FT-IR) also confirmed the hydrogen bonding between urea and kaolinite. Based on CHNS elemental analysis, 20 wt.% urea was intercalated between kaolinite layers. The urea-intercalated kaolinite was mixed with hydroxypropyl methylcellulose (HPMC) binder and was granulated to prepare the nitrogen-based controlled release fertilizer.To study the nitrogen release behavior of granules, ultraviolet/visible (UV-Vis) spectroscopy was used through the diacetyl monoxime (DAM) colorimetric method. The result of UV-Vis spectroscopy showed that intercalation of urea into kaolinite decreased the nitrogen release from 25.50 to 13.66% after 24 h and from 98.15 to 70.01% after 30 days of incubation in water. According to the results, the prepared controlled release fertilizer (CRF) behaved according to the standard for CRFs.

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confidence: 99%

Intercalation of urea into kaolinite for preparation of controlled release fertilizer

Mahdavi

Abdul

Khanif

2014

CI&CEQ

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“…Depending on the pore diameter of zeolite, the incorporated salt can be stabilized through geometric adjustment and/or electrostatic interaction with the zeolite. The most common salt used in this process is ammonium nitrate, as it is one of the most used in the fertilizer industry (Carvalho et al., 2003).…”

Section: Application Of Zeolites From Residues In Plant Growthmentioning

confidence: 99%

Zeolites synthesized from agro‐industrial residues applied in agriculture: A review and future prospects

de Carvalho Izidoro,

Fungaro,

Cataldo

2023

Soil Use and Management

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Zeolites have been widely applied as catalysts, wastewater treatment agents, gas adsorbents and fertilizers, among others. However, the use of natural zeolites or those synthesized from oversaturated commercial solutions are more explored commercially than the zeolites synthesized from residues. Therefore, the aim of this review is to highlight the importance of zeolites synthesized from agro‐industrial residues and their use in agriculture. This review has been divided into three different sections, that is, zeolites, agriculture applications, synthesis of zeolites from residues and their application in plant growth. In the first section, the definition, types and the critical properties of zeolites are explained. The second section gives a brief review of the application of zeolites in agriculture. Finally, the synthesis of zeolites from residues, such as coal ash, rice husk ash and sugarcane ash, with special attention to renewable sources is presented. The optimization of the synthesis of zeolites from residues with the incorporation of specific nutrients necessary for the cultivation of soybeans, corn and sugarcane (considered the most significant crops in Brazilian agriculture in terms of the planted area) can significantly contribute to the concept of circular economy at the industries and the fulfilment of sustainable development objectives, especially, the number 12 (SDO—12—Responsible consumption and production).

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“…4,5 Quando as zeólitas são tratadas com sais no estado sólido ou fundido, ocorrem substituições das água de adsorção, dentro dos poros da zeólita. 6 Dependendo do tamanho da janela dos poros da zeólita, o sal introduzido pode ser estabilizado através de ajuste geométrico e/ou interação eletrostática com a zeólita.…”

Section: Introductionunclassified

Nitrato de amônio ocluído em zeólita 4A: lixiviação e absorção de nitrogênio no cultivo de milho

Andrade¹,

Silva²,

Soares³

et al. 2011

Quím. Nova

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Recebido em 9/1/11; aceito em 4/5/11; publicado na web em 4/7/11 NITRATE OCCLUDED IN ZEOLITE 4A: ABSORPTION AND LEACHING OF NITROGEN IN THE CULTIVATION OF CORN. Systematic studies were undertaken in the intra zeolitic media to better understand the ability of zeolite type LTA in occluded nitrogen used in fertilizer and soil conditioning. We have measured the dry matter production from the cultivation of corn in a greenhouse for about 40 days, and also the amounts of nitrogen absorbed, retained and lost by leaching. The dry matter production in the cultivation with different concentrations of nitrogen occluded in the zeolite, was more efficient than the traditional fertilizer, which demonstrated better use of nitrogen to reduce leaching losses, which implies a possible reduction of costs for nitrogen.Keywords: occlusion; release of nitrogen; fertilization. INTRODUÇÃOCom a tendência de crescimento do mercado agrícola, pesquisadores têm apresentado novos sistemas de cultivo, como os protegidos (túneis e estufas) e o hidropônico, em alternativa ao sistema tradicional do campo. Além destas, existe uma possibilidade de cultivo pouco empregada que é o zeopônico, no qual plantas são cultivadas em substrato artificial composto pelo aluminossilicato zeólita, 1 que funciona como um sistema de liberação controlada e renovável de nutrientes minerais para as plantas. 2 Este mineral apresenta três propriedades principais que conferem grande interesse para uso na agricultura: alta capacidade de troca de cátions, alta capacidade de retenção de água livre nos canais e alta habilidade na adsorção. 3 Assim, a zeólita pode atuar na melhoria da eficiência do uso de nutrientes quanto à sua disponibilidade, na melhora do aproveitamento do nitrogênio (NH 4 + e NO 3 -) e redução das perdas por lixiviação dos cátions trocáveis, especialmente K + , e também como um fertilizante de liberação lenta. 4,5 Quando as zeólitas são tratadas com sais no estado sólido ou fundido, ocorrem substituições das água de adsorção, dentro dos poros da zeólita. 6 Dependendo do tamanho da janela dos poros da zeólita, o sal introduzido pode ser estabilizado através de ajuste geométrico e/ou interação eletrostática com a zeólita.Os pesquisadores relatam que, além do nitrato de amônio, diversos outros sais poderiam ser ocluídos em estruturas zeolíticas e argilas. [7][8][9][10] Zeólitas ocluídas com sais possuem dois tipos diferentes de fontes de nutrientes para plantas, cátions trocáveis de sua própria estrutura e o sal ocluído. Suas estruturas acomodam muito mais nutrientes no estado sólido do que através de troca catiônica em solução aquosa. Com isso, estudos sistemáticos sobre as propriedades de sais ocluídos têm se mostrado necessários para melhor compreensão dos mecanismos que permitiriam que as zeólitas pudessem ser utilizadas na estabilização de fertilizantes e como condicionadores de solos. 2,11,12 Para a região tropical, há uma necessidade de se desenvolver tecnologias próprias para obtenção de matérias-primas e novos fertilizantes voltados às condições ...

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Nitrate occlusion studies in Y zeolite and in a clay pillared with aluminium oxide

Cited by 8 publications

References 28 publications

Intercalation of urea into kaolinite for preparation of controlled release fertilizer

Intercalation of urea into kaolinite for preparation of controlled release fertilizer

Zeolites synthesized from agro‐industrial residues applied in agriculture: A review and future prospects

Nitrato de amônio ocluído em zeólita 4A: lixiviação e absorção de nitrogênio no cultivo de milho

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