Application of chicken eggshell waste as a starting material for synthesizing calcium niobate (Ca4Nb2O9) powder

“…A similar result was presented by Boronat et al (2015) in which they obtained 97.68% of CaO in the total composition, having magnesium oxide as the secondary composition. Similar results were also obtained by Kamkum et al (2015 Table 2 -Chemical composition of the oxides formed by the calcination of the white eggshell, brown eggshell and commercial CaCO 3 .…”

Section: X-ray Fluorescence (Xrf)supporting

confidence: 83%

GERMINAÇÃO E VIGOR DE SEMENTES DE Lactuca sativa L. APÓS PRAZO DE VALIDADE

Lemos¹,

Silva²,

Silva³

et al. 2019

Ciência, Tecnologia E Inovação

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Elaborado por Maurício Amormino Júnior-CRB6/2422 O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores. 2019 Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. www.atenaeditora.com.br APRESENTAÇÃO Há quase quarenta anos, Alvim Toffler em seu Best Seller, The Third Wave, profetizou; "Pode-se criar mais valor com uma ideia em dez segundos do que com dez mil horas em uma linha de produção". Esta talvez seja a melhor definição de inovação, não exatamente do conceito, mas do que ela efetivamente gera como efeito nas organizações e na sociedade. Ciência, tecnologia e ambiente, considerando neste último fatores econômicos, sociais e legais, são base para a inovação. No que no que concerne a nossos pesquisadores, eles tem feito a parte deles, produzido ciência e tecnologia a despeito das dificuldades econômicas e culturais no Brasil. Há muito que melhorar sim, mas também a muito há se reconhecer. Esse livro apresenta dois pilares de inovação, ciência e tecnologia, em uma reunião de vinte e quatro artigos, que são o resultado de pesquisas realizadas nos mais diversos setores com uma riqueza de metodologias e resultados. Nesta obra, temos a oportunidade de leitura é fruto de trabalhos científicos de diversos pesquisadores. Aos pesquisadores, editores e aos leitores para quem em última análise todo o trabalho é realizado, agradecemos imensamente pela oportunidade de organizar tal obra.

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“…One of the potential biowastes that can be reclaimed into useful and valuable products is eggshell waste. 1,3 CaCO 3 from a calcified chicken eggshell exists in a form of calcite crystal and can be used as a precursor for a wide range of applications 4,5 such as production of hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 ) for bone and teeth substitutes, 6 CaNb 2 O 6 and CaNb 4 O 9 for microwave dielectric ceramics, 7,8 biofillers for polymer composites, 9,10 coating pigments, 11 adsorbents for removal of dyes, organic pollutants, and heavy metals, 12 and catalysts for biodiesel, hydrogen/syngas, and dimethyl carbonated production. Generally, eggshell waste is considered as a useless matter and disposed in landfills without any pretreatment.…”

Section: Introductionmentioning

confidence: 99%

“…2 Chicken eggshell, a major eggshell waste product, is a natural porous bioceramic composed of 94% (weight) calcium carbonate (CaCO 3 ), 1% magnesium carbonate (MgCO 3 ), 1% calcium phosphate (Ca 3 (PO 4 ) 2 ), 4% organic matter, and water. 1,3 CaCO 3 from a calcified chicken eggshell exists in a form of calcite crystal and can be used as a precursor for a wide range of applications 4,5 such as production of hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 ) for bone and teeth substitutes, 6 CaNb 2 O 6 and CaNb 4 O 9 for microwave dielectric ceramics, 7,8 biofillers for polymer composites, 9,10 coating pigments, 11 adsorbents for removal of dyes, organic pollutants, and heavy metals, 12 and catalysts for biodiesel, hydrogen/syngas, and dimethyl carbonated production. 3,13 Among these applications, superhydrophobic surface fabricated from eggshell waste has just been reported recently.…”

Section: Introductionmentioning

confidence: 99%

Facile and eco‐friendly fabrication of hierarchical superhydrophobic coating from eggshell biowaste

Seeharaj

Sripako

Promta

et al. 2019

Int J Applied Ceramic Tech

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This study reports a facile and sustainable approach to fabricate superhydrophobic coating from eggshell biowaste. The coating was prepared by ball milling chicken eggshells, composed of hydrophilic calcium carbonate (CaCO3), to microsized particles followed by surface hydrophobilizing with stearic acid (C17H35COOH) to form low surface energy nanosized calcium stearate ((C17H35COO)2Ca) through the esterification of hydroxyl groups (‐OH) absorbed on a surface of CaCO3 with carboxyl groups (–COOH) of stearic acid. Then, a layer of modified eggshell particles dispersed in polystyrene (PS) binder was dip‐coated on a substrate. A coated surface with water contact angles of 151° ± 1° on glass and 153° ± 1° on cotton fabric substrates was achieved when a 4:1 weight ratio of the modified eggshell:PS was used. The uniform distribution of the modified eggshell particles throughout the coating led to a surface with high degree of hierarchical micro‐nanoscale roughness which resulted in superhydrophobicity. The superhydrophobic eggshell coating showed good environmental stability, self‐cleaning, and oil/water separation properties. These results suggest that eggshell biowaste can be utilized for superhydrophobic applications.

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Application of chicken eggshell waste as a starting material for synthesizing calcium niobate (Ca4Nb2O9) powder

Cited by 21 publications

References 19 publications

Evaluation of Heterogeneous Catalysts Derived From White and Brown Chicken Eggshell for Soybean Biodiesel Synthesis

Evaluation of Heterogeneous Catalysts Derived From White and Brown Chicken Eggshell for Soybean Biodiesel Synthesis

GERMINAÇÃO E VIGOR DE SEMENTES DE Lactuca sativa L. APÓS PRAZO DE VALIDADE

Facile and eco‐friendly fabrication of hierarchical superhydrophobic coating from eggshell biowaste

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