Assessment of Miscanthus × giganteus derived biochar as copper and zinc adsorbent: study of the effect of pyrolysis temperature, pH and hydrogen peroxide modification

Alessio Cibati, Bente Foereid, Ajay Bissessur, Simona M. Hapca

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Abstract

In this work, experimental and modelling investigations were conducted on biochars pyrolyzed at 350 °C and 600 °C, to determine the effect of pyrolysis temperature, hydrogen peroxide activation and pH on copper and zinc removal, in comparison with commercially available activated carbons. Characterization of biochars was performed by BET surface area, elemental analysis and FTIR spectroscopy. Experiments results demonstrated that biochar pyrolyzed at 600 °C adsorbed both copper and zinc more efficiently than biochar pyrolyzed at 350 °C. Chemical activation by H2O2 increased the removal capacity of biochar pyrolyzed at 350 °C. All investigated biochars showed a stronger affinity for copper retention, with a maximum adsorption capacity of 15.7 mg/g while zinc was 10.4 mg/g. The best adsorption performances were obtained at pH 5 and 6. Langmuir adsorption isotherm described copper adsorption process satisfactorily, while zinc adsorption was better described by Freundlich isotherm.
Original languageEnglish
Pages (from-to)1285-1296
Number of pages12
JournalJournal of Cleaner Production
Volume162
Early online date18 Jun 2017
DOIs
Publication statusPublished - 20 Sep 2017

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Adsorbents
Hydrogen Peroxide
Zinc
Copper
Pyrolysis
Adsorption
Temperature
Chemical activation
Adsorption isotherms
Activated carbon
Isotherms
biochar
Spectroscopy
Chemical analysis
Experiments

Cite this

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title = "Assessment of Miscanthus × giganteus derived biochar as copper and zinc adsorbent: study of the effect of pyrolysis temperature, pH and hydrogen peroxide modification",
abstract = "In this work, experimental and modelling investigations were conducted on biochars pyrolyzed at 350 °C and 600 °C, to determine the effect of pyrolysis temperature, hydrogen peroxide activation and pH on copper and zinc removal, in comparison with commercially available activated carbons. Characterization of biochars was performed by BET surface area, elemental analysis and FTIR spectroscopy. Experiments results demonstrated that biochar pyrolyzed at 600 °C adsorbed both copper and zinc more efficiently than biochar pyrolyzed at 350 °C. Chemical activation by H2O2 increased the removal capacity of biochar pyrolyzed at 350 °C. All investigated biochars showed a stronger affinity for copper retention, with a maximum adsorption capacity of 15.7 mg/g while zinc was 10.4 mg/g. The best adsorption performances were obtained at pH 5 and 6. Langmuir adsorption isotherm described copper adsorption process satisfactorily, while zinc adsorption was better described by Freundlich isotherm.",
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Assessment of Miscanthus × giganteus derived biochar as copper and zinc adsorbent : study of the effect of pyrolysis temperature, pH and hydrogen peroxide modification. / Cibati, Alessio; Foereid, Bente; Bissessur, Ajay; Hapca, Simona M.

In: Journal of Cleaner Production, Vol. 162, 20.09.2017, p. 1285-1296.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Assessment of Miscanthus × giganteus derived biochar as copper and zinc adsorbent

T2 - study of the effect of pyrolysis temperature, pH and hydrogen peroxide modification

AU - Cibati, Alessio

AU - Foereid, Bente

AU - Bissessur, Ajay

AU - Hapca, Simona M.

PY - 2017/9/20

Y1 - 2017/9/20

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AB - In this work, experimental and modelling investigations were conducted on biochars pyrolyzed at 350 °C and 600 °C, to determine the effect of pyrolysis temperature, hydrogen peroxide activation and pH on copper and zinc removal, in comparison with commercially available activated carbons. Characterization of biochars was performed by BET surface area, elemental analysis and FTIR spectroscopy. Experiments results demonstrated that biochar pyrolyzed at 600 °C adsorbed both copper and zinc more efficiently than biochar pyrolyzed at 350 °C. Chemical activation by H2O2 increased the removal capacity of biochar pyrolyzed at 350 °C. All investigated biochars showed a stronger affinity for copper retention, with a maximum adsorption capacity of 15.7 mg/g while zinc was 10.4 mg/g. The best adsorption performances were obtained at pH 5 and 6. Langmuir adsorption isotherm described copper adsorption process satisfactorily, while zinc adsorption was better described by Freundlich isotherm.

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