Cork waste for metal removal from aqueous solution
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dc.contributor.author
dc.contributor.other
dc.date.accessioned
2016-03-01T09:33:43Z
dc.date.available
2016-03-01T09:33:43Z
dc.date.issued
2015-06
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dc.description.abstract
In this work the potencial of cork waste to remove Cu (II) and Cr (VI) from aqueous solutions
has been studied. Raw cork and biochar prepared by pyrolysis of the cork, were used.
Kinetic and equilibrium batch sorption experiments were performed in order to compare
the sorption efficiency of each material. Adsorption isotherms were expressed by Langmuir
and Freundlich equilibrium models. Moreover the batch kinetic experiments were fitted to
the commonly pseudo-first-order and pseudo-second-order equations.
The results showed that the metal removal using raw cork as the sorbent is pH-dependent
with the uptake of 61.5% for chromium at pH 3 and 55.6% for copper at pH 6. Two types of
cork size (0.5mm and 2 mm particle size) showed the same adsorption potential.
Biochar with high specific surface area (300 m2 g-1) can be easily prepared from the raw
cork.
The raw cork results show that pseudo-second-order describe better kinetic data for both
metals. According to kinetic data the adsorption of chromium using biochar is the best
option for removing this metal from water.
Biochar is able to sorb copper and chromium. The Langmuir model is not able to fit the
experimental values for Cr, nevertheless is able to fit Cu, where the maximum adsorption
was 13.4 mg kg-1. Freundlich model can fit the experimental values for both metals. Where
Cu maximum adsorption was 14.8 mg kg-1 and Cr maximum adsorption was 4.6 mg kg-1
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application/pdf
dc.language.iso
eng
dc.relation.ispartofseries
Enginyeria Química (TFG)
dc.rights
Attribution-NonCommercial-NoDerivs 3.0 Spain
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dc.subject
dc.title
Cork waste for metal removal from aqueous solution
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info:eu-repo/semantics/bachelorThesis
dc.rights.accessRights
info:eu-repo/semantics/openAccess