Mexican natural clinoptilolite treated with silver for DDD removal from water

The capability of a natural clinoptilolite to remove DDD in function of the temperature and variation of silver concentration was studied. The MEB-EDX and BET tech­niques analyzed the natural and modified samples. By kinetic tests, it was found that equilibrium occurred at 180 minutes of contact and...

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Authors: Alvarado Ibarra, Juana, Terán-Samaniego, Karla, Vargas-Hernández, Diana, Bautista Olivas, Ana Laura
Format: article
Status:Published version
Publication Date:2020
Country:México
Institution:UNIVERSIDAD DE SONORA
Repository:Biotecnia
Language:Spanish
OAI Identifier:oai:oai.biotecnia.unison.mx:article/1308
Online Access:https://biotecnia.unison.mx/index.php/biotecnia/article/view/1308
Access Level:Open access
Keyword:natural clinoptilolite, kinetic of removal, adsorption isotherms, dichlorodiphenyl dichloroethane, silver.
clinoptilolita natural, cinética de remoción, isotermas de adsorción, diclorodifenil dicloroetano, plata.
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repository_id_str
spelling Mexican natural clinoptilolite treated with silver for DDD removal from waterClinoptilolita natural mexicana tratada con plata para remover DDD en aguaAlvarado Ibarra, JuanaTerán-Samaniego, KarlaVargas-Hernández, DianaBautista Olivas, Ana Lauranatural clinoptilolite, kinetic of removal, adsorption isotherms, dichlorodiphenyl dichloroethane, silver.clinoptilolita natural, cinética de remoción, isotermas de adsorción, diclorodifenil dicloroetano, plata.The capability of a natural clinoptilolite to remove DDD in function of the temperature and variation of silver concentration was studied. The MEB-EDX and BET tech­niques analyzed the natural and modified samples. By kinetic tests, it was found that equilibrium occurred at 180 minutes of contact and that silver increases the removal efficiency. The process displayed a chemisorption kinetic, since it was adjusted to the pseudo second-order model and the coef­ficients of determination varied in a range from 0.9933 to 0.9997. By the adsorption isotherms, the maximum adsorbed concentration was obtained at 0.19 mg/g. The data fit per­fectly to the Langmuir model, in which a decrease was ob­served in constant b, related to the adsorption energy, when there was an increase in temperature. The latter indicates a decrease in adsorption at high temperatures, with the order of adsorption being 25° C> 35° C> 45° C. It is concluded that the process is exothermic, since the adsorption was greater when the temperature lowered, corroborated by the calcula­tion of the thermodynamic parameters (ΔH °, ΔG ° and ΔS °).Se estudió el efecto de la temperatura y de la variación de la concentración de plata en una clinoptilolita natural para remover DDD. Mediante las técnicas MEB-EDX y BET se analizó a la muestra natural y modificada. En las pruebas cinéticas se encontró que el equilibrio se presenta a los 180 minutos de contacto y que la plata incrementa la eficiencia de remoción. El proceso presenta una cinética por quimisor­ción, ya que se ajustó al modelo de pseudo segundo orden y los coeficientes de determinación variaron en un intervalo de 0.9933 a 0.9997. Por las isotermas de adsorción se obtuvo que la máxima concentración adsorbida es de 0.19 mg/g y los datos ajustaron perfectamente al modelo de Langmuir, en el cual se observa que la constante b, relacionada con la energía de adsorción, disminuye cuando hay aumento en la temperatura, lo que indica un decremento de la adsorción a altas temperaturas, teniendo que el orden de adsorción es 25 °C > 35 °C > 45 °C. Se concluye que el proceso es de natu­raleza exotérmica, al tener que la adsorción es mayor cuando la temperatura es menor, corroborado por el cálculo de los parámetros termodinámicos (ΔH°, ΔG° y ΔS°).Universidad de Sonora2020-09-23info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionOriginal peer-reviewed articlesArtículos originales evaluados por paresapplication/pdftext/xmlhttps://biotecnia.unison.mx/index.php/biotecnia/article/view/130810.18633/biotecnia.v22i3.1308Biotecnia; Vol. 22 No. 3 (2020): Septiembre-Diciembre; 146-155Biotecnia; Vol. 22 Núm. 3 (2020): Septiembre-Diciembre; 146-1551665-14561665-1456reponame:Biotecniainstname:UNIVERSIDAD DE SONORAinstacron:UNISONspahttps://biotecnia.unison.mx/index.php/biotecnia/article/view/1308/467https://biotecnia.unison.mx/index.php/biotecnia/article/view/1308/521Derechos de autor 2020 Biotecniainfo:eu-repo/semantics/openAccessoai:oai.biotecnia.unison.mx:article/13082024-08-19T18:52:20Z
dc.title.none.fl_str_mv Mexican natural clinoptilolite treated with silver for DDD removal from water
Clinoptilolita natural mexicana tratada con plata para remover DDD en agua
title Mexican natural clinoptilolite treated with silver for DDD removal from water
spellingShingle Mexican natural clinoptilolite treated with silver for DDD removal from water
Alvarado Ibarra, Juana
natural clinoptilolite, kinetic of removal, adsorption isotherms, dichlorodiphenyl dichloroethane, silver.
clinoptilolita natural, cinética de remoción, isotermas de adsorción, diclorodifenil dicloroetano, plata.
title_short Mexican natural clinoptilolite treated with silver for DDD removal from water
title_full Mexican natural clinoptilolite treated with silver for DDD removal from water
title_fullStr Mexican natural clinoptilolite treated with silver for DDD removal from water
title_full_unstemmed Mexican natural clinoptilolite treated with silver for DDD removal from water
title_sort Mexican natural clinoptilolite treated with silver for DDD removal from water
dc.creator.none.fl_str_mv Alvarado Ibarra, Juana
Terán-Samaniego, Karla
Vargas-Hernández, Diana
Bautista Olivas, Ana Laura
author Alvarado Ibarra, Juana
author_facet Alvarado Ibarra, Juana
Terán-Samaniego, Karla
Vargas-Hernández, Diana
Bautista Olivas, Ana Laura
author_role author
author2 Terán-Samaniego, Karla
Vargas-Hernández, Diana
Bautista Olivas, Ana Laura
author2_role author
author
author
dc.subject.none.fl_str_mv natural clinoptilolite, kinetic of removal, adsorption isotherms, dichlorodiphenyl dichloroethane, silver.
clinoptilolita natural, cinética de remoción, isotermas de adsorción, diclorodifenil dicloroetano, plata.
topic natural clinoptilolite, kinetic of removal, adsorption isotherms, dichlorodiphenyl dichloroethane, silver.
clinoptilolita natural, cinética de remoción, isotermas de adsorción, diclorodifenil dicloroetano, plata.
description The capability of a natural clinoptilolite to remove DDD in function of the temperature and variation of silver concentration was studied. The MEB-EDX and BET tech­niques analyzed the natural and modified samples. By kinetic tests, it was found that equilibrium occurred at 180 minutes of contact and that silver increases the removal efficiency. The process displayed a chemisorption kinetic, since it was adjusted to the pseudo second-order model and the coef­ficients of determination varied in a range from 0.9933 to 0.9997. By the adsorption isotherms, the maximum adsorbed concentration was obtained at 0.19 mg/g. The data fit per­fectly to the Langmuir model, in which a decrease was ob­served in constant b, related to the adsorption energy, when there was an increase in temperature. The latter indicates a decrease in adsorption at high temperatures, with the order of adsorption being 25° C> 35° C> 45° C. It is concluded that the process is exothermic, since the adsorption was greater when the temperature lowered, corroborated by the calcula­tion of the thermodynamic parameters (ΔH °, ΔG ° and ΔS °).
publishDate 2020
dc.date.none.fl_str_mv 2020-09-23
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Original peer-reviewed articles
Artículos originales evaluados por pares
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://biotecnia.unison.mx/index.php/biotecnia/article/view/1308
10.18633/biotecnia.v22i3.1308
url https://biotecnia.unison.mx/index.php/biotecnia/article/view/1308
identifier_str_mv 10.18633/biotecnia.v22i3.1308
dc.language.none.fl_str_mv spa
language spa
dc.relation.none.fl_str_mv https://biotecnia.unison.mx/index.php/biotecnia/article/view/1308/467
https://biotecnia.unison.mx/index.php/biotecnia/article/view/1308/521
dc.rights.none.fl_str_mv Derechos de autor 2020 Biotecnia
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Derechos de autor 2020 Biotecnia
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
text/xml
dc.publisher.none.fl_str_mv Universidad de Sonora
publisher.none.fl_str_mv Universidad de Sonora
dc.source.none.fl_str_mv Biotecnia; Vol. 22 No. 3 (2020): Septiembre-Diciembre; 146-155
Biotecnia; Vol. 22 Núm. 3 (2020): Septiembre-Diciembre; 146-155
1665-1456
1665-1456
reponame:Biotecnia
instname:UNIVERSIDAD DE SONORA
instacron:UNISON
instname_str UNIVERSIDAD DE SONORA
instacron_str UNISON
institution UNISON
reponame_str Biotecnia
collection Biotecnia
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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