published by "GHEORGHE ASACHI" TECHNICAL UNIVERSITY of Iaşi
Secţia CHIMIE şi INGINERIE CHIMICĂ
abridged as Bul. Inst. Polit. Iaşi
THE BULLETIN OF THE POLYTECHNIC INSTITUTE FROM IAŞI
CHEMISTRY and CHEMICAL ENGINEERING Section
ISSN: 2537 - 2947
ISSN-L: 0254 - 7104
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Contents pages 1 - 8 |
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MIHAELA DARIE, GABRIELA CARJA Photocatalytic and Photo-Fenton Degradation of Ibuprophen under Solar Light Irradiation pages 9 - 21 |
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OANA ALEXANDRA PĂTRĂUŢANU, MIHAI BREBU, VALENTIN I. POPA, IRINA VOLF Opportunity to Apply Thermal Decomposition of Spruce Bark after Extractives Recovery pages 23 - 33 |
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CRISTIAN IONUȚ SANDU, ANA-MARIA CHEȘCĂ, ADRIAN CĂTĂLIN PUIȚEL, DAN
GAVRILESCU Cellulosic Fibers from Miscanthus pages 35 - 46 |
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SILVIA PRUTEANU, LAURA BULGARIU, MARIA GAVRILESCU Biosorption Potential of the Main Fractions Separated from Peat (Poiana Stampei, Romania) pages 47 - 56 |
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LAVINIA TOFAN, CARMEN PĂDURARU, ION BUNIA, ROXANA LAURA MIHĂILESCU
AMĂLINEI, ANCA MIRON Pb(II) Removal from Aqueous Solutions by Using Wastes of Pinus Strobus Bark pages 57 - 70 |
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Contents
pages 1- 8
Photocatalytic and Photo-Fenton Degradation of Ibuprophen under Solar Light Irradiation
pages 9 - 21
MIHAELA DARIE, “Gheorghe Asachi” Technical University of
Iaşi, Faculty of Chemical Engineering and Environmental Protection,
ddariemihaela@yahoo.com
GABRIELA CARJA, “Gheorghe Asachi” Technical University of
Iaşi, Faculty of Chemical Engineering and Environmental Protection,
gcarja@ch.tuiasi.ro
Abstract:
In this work, the degradation of pharmaceutical agent ibuprofen by
photocatalysis and photo-Fenton catalysis, using artificial visible
light irradiation and H2O2 as Fenton reagent, was carried out. Two
efficient Fe/LDHs photocatalysts with different iron content were
fabricated. First, the LDH precursor with Zn2+ and Al3+ as di- and
trivalent brucite-like cations (Zn2+/Al3+ = 3/1) was obtained by
co-precipitation method and denoted as Zn3Al. Then, by the
structural reconstruction of the calcined Zn3Al in aqueous solution
of FeSO4∙7H2O, two Fe/LDH- based nanocomposites were obtained and
denoted as Fe(1%)Zn3Al and Fe(4%)Zn3Al. The structural and optical
properties of the samples were studied by XRD, FTIR and UV-Vis
techniques. The photocatalytic tests were performed using a solar
simulator as irradiation source. Photocatalytic results showed that
the novel catalysts is efficient for the ibuprofen degradation. A
remarkable enhancement of Ibuprofen degradation was obtained in the
case of photo-Fenton process, up to 89% by Fe(1%)Zn3Al
nanocomposite. Increasing the content of Fe in the catalysts showed
an insignificant effect in enhancing the catalyst efficiency for
ibuprofen removal.
Keywords: photocatalyst; ibuprofen; photo-Fenton; solar photodegradation.
Opportunity to Apply Thermal Decomposition of Spruce Bark after Extractives Recovery
pages 23 - 33
OANA ALEXANDRA PĂTRĂUŢANU, “Gheorghe Asachi” Technical
University of Iaşi, Faculty of Chemical Engineering and
Environmental Protection
MIHAI BREBU, “Petru Poni” Institute of Macromolecular
Chemistry, Iaşi
VALENTIN I. POPA, “Gheorghe Asachi” Technical University of
Iaşi, Faculty of Chemical Engineering and Environmental Protection
IRINA VOLF, “Gheorghe Asachi” Technical University of Iaşi,
Faculty of Chemical Engineering and Environmental Protection,
iwolf@tuiasi.ro
Abstract
The work explores the possibility to use the thermal decomposition
of spruce bark (Picea Abies) in a second biorefinery flow
sheet. Spruce bark was characterised and humidity, ash,
hemicelluloses, cellulose and lignin content were determined. For
the recovery of extractives two procedures were applied: the biomass
was extracted with toluene-ethanol mixture using a conventional
extraction and a 70% ethanol solution was used in an ultrasound
assisted extraction process. In both cases the solid waste was
subjected to pyrolysis conducted at 550°C under relatively low
heating rate of 10°C/min. The aqueous phase was analysed by GC-MS.
Similarities and some differences are highlighted by the
GC-chromatograms and NP-gram characterisation, depending on the
extraction procedures applied.
Keywords: biomass; extractives; pyrolysis; GC-MS; NP-gram.
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