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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
03/07/2024 |
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Data da última atualização: |
31/07/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BORGES, R.; BRONDI, M.; ELIAS, A. M.; FARINAS, C. S.; RIBEIRO, C. |
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Afiliação: |
FEDERAL TECHNOLOGICAL UNIVERSITY OF PARANA; FEDERAL UNIVERSITY OF SAO CARLOS; ANDREW MILLI ELIAS, UNIVERSIDADE FEDERAL DE SÃO CARLOS (UFSCAR); CRISTIANE SANCHEZ FARINAS, CNPDIA; CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
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Título: |
Mechanochemical recycling of cellulose multilayer carton packages to produce micro and nanocellulose from the perspective of techno-economic and environmental analysis. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Journal of Environmental Management, v. 363, 121254, 2024. |
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Páginas: |
1 - 12 |
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ISSN: |
0301-4797 |
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DOI: |
https://doi.org/10.1016/j.jenvman.2024.121254 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT Despite being composed of recyclable materials, the main technological challenge of multilayer carton packs involves the efficient decompatibilization of the cellulosic, polymeric, and metallic phases. Here, a simple twostep mechanochemical process is described that uses only aqueous media and mechanical force to promote phase separation in order to fully recycle multi-layer carton packaging. The first step produces value-added micro- and nanocellulose, while in the second step, aluminum is extracted, forming precipitated aluminum and aluminum oxyhydroxides. Solid polyethylene (PE) remains with a degree of purity defined by the process efficiency. The results show that cellulose is efficiently extracted and converted into micro- and nanocellulose after 15 min of milling. In the second stage, approximately 90% of the aluminum is extracted from the PE after 15 min of milling. Due to the separation and drying medium conditions, the finely divided particles of extracted aluminum also have oxyhydroxides in their composition. It is believed that a passivation layer forms on the metallic aluminum particle. The techno-economic analysis revealed a positive net present value (NPV) of $17.5 million, with a minimum selling price of 1.62 USD/kg of cellulose. The environmental analysis concluded that most of the environmental impact of the process is associated with the entry of carton packages into the system, incorporating a small environmental load related to the industrial process. The results indicate a promising option toward a circular economy and carbon neutrality. MenosABSTRACT Despite being composed of recyclable materials, the main technological challenge of multilayer carton packs involves the efficient decompatibilization of the cellulosic, polymeric, and metallic phases. Here, a simple twostep mechanochemical process is described that uses only aqueous media and mechanical force to promote phase separation in order to fully recycle multi-layer carton packaging. The first step produces value-added micro- and nanocellulose, while in the second step, aluminum is extracted, forming precipitated aluminum and aluminum oxyhydroxides. Solid polyethylene (PE) remains with a degree of purity defined by the process efficiency. The results show that cellulose is efficiently extracted and converted into micro- and nanocellulose after 15 min of milling. In the second stage, approximately 90% of the aluminum is extracted from the PE after 15 min of milling. Due to the separation and drying medium conditions, the finely divided particles of extracted aluminum also have oxyhydroxides in their composition. It is believed that a passivation layer forms on the metallic aluminum particle. The techno-economic analysis revealed a positive net present value (NPV) of $17.5 million, with a minimum selling price of 1.62 USD/kg of cellulose. The environmental analysis concluded that most of the environmental impact of the process is associated with the entry of carton packages into the system, incorporating a small environmental load related to the industrial pr... Mostrar Tudo |
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Palavras-Chave: |
Mechanochemical recycling; Micro- and nanocellulose; Multilayer carton packages. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02421naa a2200241 a 4500
001 2165362
005 2024-07-31
008 2024 bl uuuu u00u1 u #d
022 $a0301-4797
024 7 $ahttps://doi.org/10.1016/j.jenvman.2024.121254$2DOI
100 1 $aBORGES, R.
245 $aMechanochemical recycling of cellulose multilayer carton packages to produce micro and nanocellulose from the perspective of techno-economic and environmental analysis.$h[electronic resource]
260 $c2024
300 $a1 - 12
520 $aABSTRACT Despite being composed of recyclable materials, the main technological challenge of multilayer carton packs involves the efficient decompatibilization of the cellulosic, polymeric, and metallic phases. Here, a simple twostep mechanochemical process is described that uses only aqueous media and mechanical force to promote phase separation in order to fully recycle multi-layer carton packaging. The first step produces value-added micro- and nanocellulose, while in the second step, aluminum is extracted, forming precipitated aluminum and aluminum oxyhydroxides. Solid polyethylene (PE) remains with a degree of purity defined by the process efficiency. The results show that cellulose is efficiently extracted and converted into micro- and nanocellulose after 15 min of milling. In the second stage, approximately 90% of the aluminum is extracted from the PE after 15 min of milling. Due to the separation and drying medium conditions, the finely divided particles of extracted aluminum also have oxyhydroxides in their composition. It is believed that a passivation layer forms on the metallic aluminum particle. The techno-economic analysis revealed a positive net present value (NPV) of $17.5 million, with a minimum selling price of 1.62 USD/kg of cellulose. The environmental analysis concluded that most of the environmental impact of the process is associated with the entry of carton packages into the system, incorporating a small environmental load related to the industrial process. The results indicate a promising option toward a circular economy and carbon neutrality.
653 $aMechanochemical recycling
653 $aMicro- and nanocellulose
653 $aMultilayer carton packages
700 1 $aBRONDI, M.
700 1 $aELIAS, A. M.
700 1 $aFARINAS, C. S.
700 1 $aRIBEIRO, C.
773 $tJournal of Environmental Management$gv. 363, 121254, 2024.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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Biblioteca |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Unidades Centrais. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
08/12/1997 |
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Data da última atualização: |
08/12/1997 |
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Autoria: |
HEWITT, G. B. |
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Afiliação: |
CNPGC. |
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Título: |
Environmental factors affecting spittlebug egg survival during the dry season in central Brazil. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.21, n.12, p.1237-1243, dez. 1986. |
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Idioma: |
Inglês |
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Conteúdo: |
Spittlebug egg survival and hatching was compared in pastures where differences occurred in vegetative characteristics and grazing intensity. Egg samples were placed in pastures at the start of the dry season and recovered before hatching began. Significantly (P<0.05) more eggs were recovered from areas where litter was present than from bare soil areas. Mortality from predators and scavengers was estimated at 73%. An additional 34% of the eggs were desiccated and 35% were nonviable. Egg survival was estimated to be 8,5% and was greater in pastures with the following characteristics: 1) canopy height > 30 cm; 2) abundant litter; 3) plant cover < 50%;4) minimal or no grazing. More predators, especially spiders (Araneida) were also collected from these types of pastures. At one site more eggs halched in a high grass pasture (74%) than in a low grass pature (59%). Although high grass may receive less damage from spittlebug feeding the disadvantages of maintaining grass > 30 cm appear to outweigh the advantages. |
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Palavras-Chave: |
Araneida; Spider. |
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Thesagro: |
Aranha; Brachiaria Decumbens; Deois Flavopicta; Zulia Entreriana. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01604naa a2200193 a 4500
001 1104446
005 1997-12-08
008 1986 bl uuuu u00u1 u #d
100 1 $aHEWITT, G. B.
245 $aEnvironmental factors affecting spittlebug egg survival during the dry season in central Brazil.
260 $c1986
520 $aSpittlebug egg survival and hatching was compared in pastures where differences occurred in vegetative characteristics and grazing intensity. Egg samples were placed in pastures at the start of the dry season and recovered before hatching began. Significantly (P<0.05) more eggs were recovered from areas where litter was present than from bare soil areas. Mortality from predators and scavengers was estimated at 73%. An additional 34% of the eggs were desiccated and 35% were nonviable. Egg survival was estimated to be 8,5% and was greater in pastures with the following characteristics: 1) canopy height > 30 cm; 2) abundant litter; 3) plant cover < 50%;4) minimal or no grazing. More predators, especially spiders (Araneida) were also collected from these types of pastures. At one site more eggs halched in a high grass pasture (74%) than in a low grass pature (59%). Although high grass may receive less damage from spittlebug feeding the disadvantages of maintaining grass > 30 cm appear to outweigh the advantages.
650 $aAranha
650 $aBrachiaria Decumbens
650 $aDeois Flavopicta
650 $aZulia Entreriana
653 $aAraneida
653 $aSpider
773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.21, n.12, p.1237-1243, dez. 1986.
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