Study of adsorption capacity of commercial activated carbon versus storage time
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/38092 |
Resumo: | The pulverized activated carbon, when well packed and stored, doesn't have either a regulated or approved shelf life. In general, this expiration date is determined based on the established requirements coming from the manufacturer itself and it is directly related to an overestimation of the time that the product is held in the customer storage location until its use. In this analysis, the research has assessed the efficiency of the moistened and the dry activated carbon powder, relating parameters of adsorption capacity (numbers of iodine and humidity) in these materials with time information. The charcoals containing alkaline surface didn’t exhibit a variation in the parameters evaluated along the storage time, since they didn’t feature statistical significance, once the Fregression < Fcritical and the rate of p > 0.05, both for dry and wet basis. From the viewed acid carbons (with corrected pH), there was only one which got sensitive to moisture and iodine adsorptions over time. From the equation of the line originated by analysis of regression for this charcoal, the following correlation was obtained: Iodine Index=824-0.370 days, showing that the storage time for the carbon was equal to 605 days, assuring that the right value of iodine index is equivalent to the limit of 600 mg I2 g-1 carbon. |
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Study of adsorption capacity of commercial activated carbon versus storage timeEstudo da capacidade de adsorção de carvões ativados comerciais versus tempo de armazenamentoCharcoalIodine indexMoistureExpiration dateCarvão vegetalÍndice de iodoUmidadePrazo de validadeThe pulverized activated carbon, when well packed and stored, doesn't have either a regulated or approved shelf life. In general, this expiration date is determined based on the established requirements coming from the manufacturer itself and it is directly related to an overestimation of the time that the product is held in the customer storage location until its use. In this analysis, the research has assessed the efficiency of the moistened and the dry activated carbon powder, relating parameters of adsorption capacity (numbers of iodine and humidity) in these materials with time information. The charcoals containing alkaline surface didn’t exhibit a variation in the parameters evaluated along the storage time, since they didn’t feature statistical significance, once the Fregression < Fcritical and the rate of p > 0.05, both for dry and wet basis. From the viewed acid carbons (with corrected pH), there was only one which got sensitive to moisture and iodine adsorptions over time. From the equation of the line originated by analysis of regression for this charcoal, the following correlation was obtained: Iodine Index=824-0.370 days, showing that the storage time for the carbon was equal to 605 days, assuring that the right value of iodine index is equivalent to the limit of 600 mg I2 g-1 carbon.O carvão ativado pulverizado quando bem embalado e estocado não possui um prazo de validade regulamentado. Em geral, esta validade é determinada de acordo com requisitos estabelecidos pelo próprio fabricante e está diretamente relacionada a uma estimativa de tempo superior ao tempo em que o produto ficará estocado no cliente até a sua utilização. Neste trabalho, avaliou-se a eficiência de carvões ativados de base seca e umectados, relacionando parâmetros de capacidade adsortiva (índice de iodo e umidade) destes materiais com o tempo. Os carvões contendo superfície alcalina não apresentaram variação nos parâmetros avaliados ao longo do tempo de armazenamento, pois não apresentaram significância estatística, uma vez que os valores de Fregressão<Fcrítico e os valores de p> 0,05, tanto para base seca como úmida. Dos carvões com caráter ácido (pH corrigido), apenas um tipo foi mais sensível à adsorção de umidade e iodo ao longo do tempo. A partir da equação de reta oriunda da análise de regressão linear para este carvão, obteve-se a correlação Índice de Iodo = 824 – 0,370 x dias, indicando que o tempo de armazenamento para este material foi igual a 605 dias, garantindo que o valor do índice de iodo seja igual ao valor limite de 600 mg I2.g-1 carvão.Universidade Federal de Santa Maria2019-09-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/3809210.5902/1980509838092Ciência Florestal; Vol. 29 No. 3 (2019); 1090-1099Ciência Florestal; v. 29 n. 3 (2019); 1090-10991980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/38092/pdfCopyright (c) 2019 Ciência Florestalinfo:eu-repo/semantics/openAccessFischer, Helen Caroline ValterLima, Liliane Schier deFelsner, Maria LurdesQuinaia, Sueli Percio2019-10-01T13:06:32Zoai:ojs.pkp.sfu.ca:article/38092Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2019-10-01T13:06:32Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Study of adsorption capacity of commercial activated carbon versus storage time Estudo da capacidade de adsorção de carvões ativados comerciais versus tempo de armazenamento |
title |
Study of adsorption capacity of commercial activated carbon versus storage time |
spellingShingle |
Study of adsorption capacity of commercial activated carbon versus storage time Fischer, Helen Caroline Valter Charcoal Iodine index Moisture Expiration date Carvão vegetal Índice de iodo Umidade Prazo de validade |
title_short |
Study of adsorption capacity of commercial activated carbon versus storage time |
title_full |
Study of adsorption capacity of commercial activated carbon versus storage time |
title_fullStr |
Study of adsorption capacity of commercial activated carbon versus storage time |
title_full_unstemmed |
Study of adsorption capacity of commercial activated carbon versus storage time |
title_sort |
Study of adsorption capacity of commercial activated carbon versus storage time |
author |
Fischer, Helen Caroline Valter |
author_facet |
Fischer, Helen Caroline Valter Lima, Liliane Schier de Felsner, Maria Lurdes Quinaia, Sueli Percio |
author_role |
author |
author2 |
Lima, Liliane Schier de Felsner, Maria Lurdes Quinaia, Sueli Percio |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Fischer, Helen Caroline Valter Lima, Liliane Schier de Felsner, Maria Lurdes Quinaia, Sueli Percio |
dc.subject.por.fl_str_mv |
Charcoal Iodine index Moisture Expiration date Carvão vegetal Índice de iodo Umidade Prazo de validade |
topic |
Charcoal Iodine index Moisture Expiration date Carvão vegetal Índice de iodo Umidade Prazo de validade |
description |
The pulverized activated carbon, when well packed and stored, doesn't have either a regulated or approved shelf life. In general, this expiration date is determined based on the established requirements coming from the manufacturer itself and it is directly related to an overestimation of the time that the product is held in the customer storage location until its use. In this analysis, the research has assessed the efficiency of the moistened and the dry activated carbon powder, relating parameters of adsorption capacity (numbers of iodine and humidity) in these materials with time information. The charcoals containing alkaline surface didn’t exhibit a variation in the parameters evaluated along the storage time, since they didn’t feature statistical significance, once the Fregression < Fcritical and the rate of p > 0.05, both for dry and wet basis. From the viewed acid carbons (with corrected pH), there was only one which got sensitive to moisture and iodine adsorptions over time. From the equation of the line originated by analysis of regression for this charcoal, the following correlation was obtained: Iodine Index=824-0.370 days, showing that the storage time for the carbon was equal to 605 days, assuring that the right value of iodine index is equivalent to the limit of 600 mg I2 g-1 carbon. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-09-30 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/38092 10.5902/1980509838092 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/38092 |
identifier_str_mv |
10.5902/1980509838092 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/38092/pdf |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Ciência Florestal info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 Ciência Florestal |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Florestal; Vol. 29 No. 3 (2019); 1090-1099 Ciência Florestal; v. 29 n. 3 (2019); 1090-1099 1980-5098 0103-9954 reponame:Ciência Florestal (Online) instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Florestal (Online) |
collection |
Ciência Florestal (Online) |
repository.name.fl_str_mv |
Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br |
_version_ |
1799944134747750400 |