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Influence of post-treatment strategies on the properties of activated chars from broiler manure

•Acid washing broiler litter activated biochars has no effect in copper ion adsorption.•Acid washing litter activated biochars affects surface area, pH, ash and carbon contents.•Manure type and activation conditions are determining factors in copper ion adsorption.•Positive correlations found betwee... Full description

Journal Title: Chemosphere January 2014, Vol.95, pp.96-104
Main Author: Lima, Isabel M.
Other Authors: Boykin, Debbie L. , Thomas Klasson, K. , Uchimiya, Minori
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0045-6535 ; DOI: 10.1016/j.chemosphere.2013.08.027
Link: http://dx.doi.org/10.1016/j.chemosphere.2013.08.027
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recordid: sciversesciencedirect_elsevierS0045-6535(13)01143-0
title: Influence of post-treatment strategies on the properties of activated chars from broiler manure
format: Article
creator:
  • Lima, Isabel M.
  • Boykin, Debbie L.
  • Thomas Klasson, K.
  • Uchimiya, Minori
subjects:
  • Activated Char
  • Broiler Manure
  • Acid Treatment
  • Adsorption
ispartof: Chemosphere, January 2014, Vol.95, pp.96-104
description: •Acid washing broiler litter activated biochars has no effect in copper ion adsorption.•Acid washing litter activated biochars affects surface area, pH, ash and carbon contents.•Manure type and activation conditions are determining factors in copper ion adsorption.•Positive correlations found between copper uptake and concentration of certain elements.•The elements (P, S) are likely present as negatively charged functional groups in the activated biochar. There are a myriad of carbonaceous precursors that can be used advantageously to produce activated carbons or chars, due to their low cost, availability and intrinsic properties. Because of the nature of the raw material, production of granular activated chars from broiler manure results in a significant ash fraction. This study was conducted to determine the influence of several pre- and post-treatment strategies in various physicochemical and adsorptive properties of the resulting activated chars. Pelletized samples of broiler litter and cake were pyrolyzed at 700°C for 1h followed by a 45min steam activation at 800°C at different water flow rates from 1 to 5mLmin−1. For each activation strategy, samples were either water-rinsed or acid-washed and rinsed or used as is (no acid wash/rinse). Activated char’s physicochemical and adsorptive properties towards copper ions were selectively affected by both pre- and post-treatments. Percent ash reduction after either rinsing or acid washing ranged from 1.1 to 15.1% but washed activated chars were still alkaline with pH ranging from 8.4 to 9.1. Acid washing or water rinsing had no significant effect in the ability of the activated char to adsorb copper ions, however it significantly affected surface area, pH, ash content and carbon content. Instead, manure type (litter versus cake) and the activation water flow rate were determining factors in copper ion adsorption which ranged from 38mgg−1 to 104mgg−1 of activated char. Moreover, strong positive correlations were found between copper uptake and concentration of certain elements in the activated char such as phosphorous, sulfur, calcium and sodium. Rinsing could suffice as a post treatment strategy for ash reduction since no significant differences in the carbon properties were observed between rinsed and acid wash treatments.
language: eng
source:
identifier: ISSN: 0045-6535 ; DOI: 10.1016/j.chemosphere.2013.08.027
fulltext: fulltext
issn:
  • 00456535
  • 0045-6535
url: Link


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titleInfluence of post-treatment strategies on the properties of activated chars from broiler manure
creatorLima, Isabel M. ; Boykin, Debbie L. ; Thomas Klasson, K. ; Uchimiya, Minori
ispartofChemosphere, January 2014, Vol.95, pp.96-104
identifierISSN: 0045-6535 ; DOI: 10.1016/j.chemosphere.2013.08.027
subjectActivated Char ; Broiler Manure ; Acid Treatment ; Adsorption
description•Acid washing broiler litter activated biochars has no effect in copper ion adsorption.•Acid washing litter activated biochars affects surface area, pH, ash and carbon contents.•Manure type and activation conditions are determining factors in copper ion adsorption.•Positive correlations found between copper uptake and concentration of certain elements.•The elements (P, S) are likely present as negatively charged functional groups in the activated biochar. There are a myriad of carbonaceous precursors that can be used advantageously to produce activated carbons or chars, due to their low cost, availability and intrinsic properties. Because of the nature of the raw material, production of granular activated chars from broiler manure results in a significant ash fraction. This study was conducted to determine the influence of several pre- and post-treatment strategies in various physicochemical and adsorptive properties of the resulting activated chars. Pelletized samples of broiler litter and cake were pyrolyzed at 700°C for 1h followed by a 45min steam activation at 800°C at different water flow rates from 1 to 5mLmin−1. For each activation strategy, samples were either water-rinsed or acid-washed and rinsed or used as is (no acid wash/rinse). Activated char’s physicochemical and adsorptive properties towards copper ions were selectively affected by both pre- and post-treatments. Percent ash reduction after either rinsing or acid washing ranged from 1.1 to 15.1% but washed activated chars were still alkaline with pH ranging from 8.4 to 9.1. Acid washing or water rinsing had no significant effect in the ability of the activated char to adsorb copper ions, however it significantly affected surface area, pH, ash content and carbon content. Instead, manure type (litter versus cake) and the activation water flow rate were determining factors in copper ion adsorption which ranged from 38mgg−1 to 104mgg−1 of activated char. Moreover, strong positive correlations were found between copper uptake and concentration of certain elements in the activated char such as phosphorous, sulfur, calcium and sodium. Rinsing could suffice as a post treatment strategy for ash reduction since no significant differences in the carbon properties were observed between rinsed and acid wash treatments.
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description•Acid washing broiler litter activated biochars has no effect in copper ion adsorption.•Acid washing litter activated biochars affects surface area, pH, ash and carbon contents.•Manure type and activation conditions are determining factors in copper ion adsorption.•Positive correlations found between copper uptake and concentration of certain elements.•The elements (P, S) are likely present as negatively charged functional groups in the activated biochar. There are a myriad of carbonaceous precursors that can be used advantageously to produce activated carbons or chars, due to their low cost, availability and intrinsic properties. Because of the nature of the raw material, production of granular activated chars from broiler manure results in a significant ash fraction. This study was conducted to determine the influence of several pre- and post-treatment strategies in various physicochemical and adsorptive properties of the resulting activated chars. Pelletized samples of broiler litter and cake were pyrolyzed at 700°C for 1h followed by a 45min steam activation at 800°C at different water flow rates from 1 to 5mLmin−1. For each activation strategy, samples were either water-rinsed or acid-washed and rinsed or used as is (no acid wash/rinse). Activated char’s physicochemical and adsorptive properties towards copper ions were selectively affected by both pre- and post-treatments. Percent ash reduction after either rinsing or acid washing ranged from 1.1 to 15.1% but washed activated chars were still alkaline with pH ranging from 8.4 to 9.1. Acid washing or water rinsing had no significant effect in the ability of the activated char to adsorb copper ions, however it significantly affected surface area, pH, ash content and carbon content. Instead, manure type (litter versus cake) and the activation water flow rate were determining factors in copper ion adsorption which ranged from 38mgg−1 to 104mgg−1 of activated char. Moreover, strong positive correlations were found between copper uptake and concentration of certain elements in the activated char such as phosphorous, sulfur, calcium and sodium. Rinsing could suffice as a post treatment strategy for ash reduction since no significant differences in the carbon properties were observed between rinsed and acid wash treatments.
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abstract•Acid washing broiler litter activated biochars has no effect in copper ion adsorption.•Acid washing litter activated biochars affects surface area, pH, ash and carbon contents.•Manure type and activation conditions are determining factors in copper ion adsorption.•Positive correlations found between copper uptake and concentration of certain elements.•The elements (P, S) are likely present as negatively charged functional groups in the activated biochar. There are a myriad of carbonaceous precursors that can be used advantageously to produce activated carbons or chars, due to their low cost, availability and intrinsic properties. Because of the nature of the raw material, production of granular activated chars from broiler manure results in a significant ash fraction. This study was conducted to determine the influence of several pre- and post-treatment strategies in various physicochemical and adsorptive properties of the resulting activated chars. Pelletized samples of broiler litter and cake were pyrolyzed at 700°C for 1h followed by a 45min steam activation at 800°C at different water flow rates from 1 to 5mLmin−1. For each activation strategy, samples were either water-rinsed or acid-washed and rinsed or used as is (no acid wash/rinse). Activated char’s physicochemical and adsorptive properties towards copper ions were selectively affected by both pre- and post-treatments. Percent ash reduction after either rinsing or acid washing ranged from 1.1 to 15.1% but washed activated chars were still alkaline with pH ranging from 8.4 to 9.1. Acid washing or water rinsing had no significant effect in the ability of the activated char to adsorb copper ions, however it significantly affected surface area, pH, ash content and carbon content. Instead, manure type (litter versus cake) and the activation water flow rate were determining factors in copper ion adsorption which ranged from 38mgg−1 to 104mgg−1 of activated char. Moreover, strong positive correlations were found between copper uptake and concentration of certain elements in the activated char such as phosphorous, sulfur, calcium and sodium. Rinsing could suffice as a post treatment strategy for ash reduction since no significant differences in the carbon properties were observed between rinsed and acid wash treatments.
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doi10.1016/j.chemosphere.2013.08.027
eissn18791298
date2014-01