Removal of copper(II) in aqueous solution using pyrolytic biochars derived from red macroalga Porphyra tenera

Steam activation enhanced the copper removal performance of Porphyra tenera-derived biochar significantly by increasing the quantity of exchangeable cations, whereas KOH activation reduced the copper removal performance of the biochar, despite the huge increase in specific surface area and pore volu...

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Bibliographic Details
Published inJournal of industrial and engineering chemistry (Seoul, Korea) Vol. 36; pp. 314 - 319
Main Authors Park, Sung Hoon, Cho, Hye Jung, Ryu, Changkook, Park, Young-Kwon
Format Journal Article
LanguageEnglish
Published Elsevier B.V 25.04.2016
한국공업화학회
Subjects
Activation
Adsorption
Biochar
Cation exchanging
Copper
Ion exchange
Isotherms
Macroalga
Porosity
Porphyra
Porphyra tenera
Surface chemistry
화학공학
Porphyra tenera
Macroalga
Adsorption
Copper
Biochar
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ISSN1226-086X
1876-794X
DOI10.1016/j.jiec.2016.02.021

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Summary:Steam activation enhanced the copper removal performance of Porphyra tenera-derived biochar significantly by increasing the quantity of exchangeable cations, whereas KOH activation reduced the copper removal performance of the biochar, despite the huge increase in specific surface area and pore volume, by washing out the exchangeable cations into the basic KOH solution. Both ion exchange and adsorption appeared to be important mechanisms for copper removal by P. tenera-derived biochar but ion exchange may be a more important mechanism. The pseudo-2nd order kinetic model and the Langmuir's isotherm model provided a good interpretation of the kinetics and equilibrium of copper removal.
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G704-000711.2016.36..049
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2016.02.021