Physico-chemical characterization of powdered activated carbons obtained by thermo-chemical conversion of brown municipal waste | Fizičko-hemijska karakterizacija praškastih aktivnih ugljeva dobijenih termo-hemijskom konverzijom biljnog komunalnog otpada
2011
Momčilović, M.Z., Prirodno-matematički fakultet, Niš (Serbia) | Purenović, M.M., Prirodno-matematički fakultet, Niš (Serbia) | Miljković, M.N., Prirodno-matematički fakultet, Niš (Serbia) | Bojić, A.Lj., Prirodno-matematički fakultet, Niš (Serbia) | Zarubica, A.R., Prirodno-matematički fakultet, Niš (Serbia) | Ranđelović, M.S., Prirodno-matematički fakultet, Niš (Serbia)
Cones of the European Black pine and Horse chestnut kernel, regarded as brown municipal waste, were utilized in this work as a precursor for powdered activated carbons. Chemical activation was employed at 500 deg C in inert atmosphere of nitrogen. Standard physico-chemical analyses were performed to examine obtained products. FTIR method was employed to determine fuctional groups which were found to be typical for activated carbons. Acidic oxygen groups were quantitatively determined using Boehm titrations. It was established that carboxylic groups on pine cone activated carbon, and phenolic groups on chestnut kernel activated carbon were dominant from all acidic oxygen groups. Since both contact pH and pHPZC were determined to be fairly acidic, it can be concluded that obtained activated carbons belong to L-type. Shape and layout of micrometer dimensioned particles were observed by scanning electron microscopy. Particles of different shapes and dimensions along with small cracks and wide crevices and voids were noticed. Textural analysis was used to determine specific surface area and pore distribution of obtained activated carbons. Obtained products possess highly developed surface area and wide pore distribution.
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