2020, Volume 66(70), Issue 3 (September)
Contents
pages 1- 8 Download
Fuzzy Logic Methodology for Environmental Sustainability Performance Evaluation
IONUŢ VIOREL HERGHILIGIU, "Gheorghe Asachi" Technical University of
Iaşi, Faculty of Industrial Design and Business Management, "Alexandru Ioan
Cuza" University of Iaşi, Faculty of Economics and Business Administration,
iherghelegiu@tuiasi.ro
IOAN
BOGDAN ROBU, "Alexandru Ioan Cuza" University of Iaşi, Faculty of Economics
and Business Administration
MARIUS PÎSLARU, "Gheorghe Asachi" Technical
University of Iaşi, Faculty of Industrial Design and Business Management
ADRIAN VÎLCU, "Gheorghe Asachi" Technical University of Iaşi, Faculty of
Industrial Design and Business Management
ANCA LAURA ASANDULUI,
"Alexandru Ioan Cuza" University of Iaşi, Faculty of Economics and Business
Administration
pages 9 - 21 Download
Abstract
Environmental sustainability performance evaluation has
become a challenge even if the literature presents many associated
researches. This challenge is a consequence of multiple measures that can be
used to approach this phenomenon. The paper purpose is to improve the
evaluation process associated to this pillar of organizational
sustainability – environmental issue/ performance. Hence this paper aim to
propose a suitable evaluation methodology, based on fuzzy logic, for
environmental sustainability performance – focus on variables and associated
dimensions of the proposed model.
Keywords: environmental performance;
EMS; suitable evaluation methodology.
Recent Advances in Anticorrosive Phosphate Pigments
NICOLAE APOSTOLESCU, "Gheorghe Asachi" Technical University of Iaşi,
"Cristofor Simionescu" Faculty of Chemical Engineering and Environmental
Protection
CORINA CERNĂTESCU, "Gheorghe Asachi" Technical University of
Iaşi, "Cristofor Simionescu" Faculty of Chemical Engineering and
Environmental Protection
CLAUDIA COBZARU, "Gheorghe Asachi" Technical
University of Iaşi, "Cristofor Simionescu" Faculty of Chemical Engineering
and Environmental Protection
RAMONA ELENA TĂTARU-FĂRMUȘ,
"Gheorghe
Asachi" Technical University of Iaşi, "Cristofor Simionescu" Faculty of
Chemical Engineering and Environmental Protection
MIHAELA AURELIA
VIZITIU, "Gheorghe Asachi" Technical University of Iaşi, "Cristofor
Simionescu" Faculty of Chemical Engineering and Environmental Protection
GABRIELA ANTOANETA APOSTOLESCU, "Gheorghe Asachi" Technical University of
Iaşi, "Cristofor Simionescu" Faculty of Chemical Engineering and
Environmental Protection,
ganto@ch.tuiasi.ro
pages 23 - 36 Download
Abstract
This study presents the anticorrosive properties of certain
types of phosphate pigments. Anticorrosive inorganic pigments are one of the
most studied categories of pigments because, according to the existing data,
nearly one-third of the world's metal production is out of use due to
corrosion. Damage due to corrosion is often related not only to the loss of
metal but also to the decommissioning of entire installations, whose
processing and installation is spent more than the cost of the material from
which they are made. The development of new products with anticorrosive
action requires an understanding of the theoretical principles - fundamental
chemistry, as well as the parameters that influence the processing
techniques. In addition, this review will also summarize the most promising
phosphates solutions (classes of compounds, physicochemical properties,
methods of obtaining, anticorrosive efficiency) for corrosion protection of
steel, aluminium, other materials and their alloys. It also briefly presents
future directions for the manufacture of anticorrosive pigments such as
submicron anticorrosive pigments, smart coatings (e.g., corrosion sensing)
or nanotechnology.
Keywords: anticorrosive inorganic pigments; corrosion
environments; phosphate pigments.
A Study of the Flammability of Magnesium in Absence of Oxygen
IOAN BARABULICĂ, "Gheorghe Asachi" Technical University
of Iași, "Cristofor Simionescu" Faculty of Chemical Engineering and
Environmental Protection,
ioan.barabulica@tuiasi.ro
IOAN MĂMALIGĂ, "Gheorghe Asachi"
Technical University of Iași, "Cristofor Simionescu" Faculty of Chemical
Engineering and Environmental Protection
pages 37 - 48 Download
Abstract
This study was performed to provide information on the
flammability of magnesium in absence of oxygen. An investigation of the
ignition and burning characteristics was conducted on prepared specimens of
magnesium ribbon from magnesium ribbon coil, by cutting samples 7 to 10 mm
in length and about 11 to 13 milligrams in weigh. Source of ignition was
represented by a kanthal wire that is passed through magnesium samples and
positioned on the device for connecting to electricity. The electrically
connectable device is added in to a pressure resistant chamber in volume of
350 cm3 connected with gas sources, vacuum pump and provided with an
evacuation outlet for depressurisation. Gases (CO2 and N2) was added in to
the chamber after using vacuum pump to extract the air. The major results of
the prepared specimen tests are presented as a family of curves which
indicate the heating effect of kanthal wire, the thermal effect of magnesium
ignition and the time and temperature were ignition take place. In general,
tests indicated that magnesium can ignite in gaseous mixtures of CO2 and N2.
The manner of developing combustion can be considered an indicator of
gaseous mixtures composition.
Keywords: carbon dioxide; combustion; heat;
magnesium; nitrogen.
Physico-Chemical Characterization of Arabica and Robusta Spent Coffee Blends
VICTORIA BEJENARI, "Gheorghe Asachi" Technical University of Iași,
"Cristofor Simionescu" Faculty of Chemical Engineering and Environmental
Protection, victoria.bejenari@tuiasi.ro
MIRELA-ANASTASIA MORARAŞ,
"Gheorghe Asachi" Technical University of Iași, "Cristofor Simionescu"
Faculty of Chemical Engineering and Environmental Protection
MARICEL
DANU, "Gheorghe Asachi" Technical University of Iași, "Cristofor Simionescu"
Faculty of Chemical Engineering and Environmental Protection, "Petru Poni"
Institute of Macromolecular Chemistry of Iaşi
CONSTANŢA IBĂNESCU,
"Gheorghe Asachi" Technical University of Iași, "Cristofor Simionescu"
Faculty of Chemical Engineering and Environmental Protection, "Petru Poni"
Institute of Macromolecular Chemistry of Iaşi
GABRIELA LISA,
"Gheorghe
Asachi" Technical University of Iași, "Cristofor Simionescu" Faculty of
Chemical Engineering and Environmental Protection
pages 49 - 57 Download
Abstract
Market surveys have lately shown that coffee is the second
best-selling commodity – after oil. Our paper is aimed at analyzing the
spent coffee blends in a professional DeLonghi coffee maker in which four
types of coffee available on the market were used. The analyzed coffee
contains blends of Arabica and Robusta coffee in various proportions. Spent
coffee blends density and viscosity was measured experimentally at different
temperatures. The browning index was measured by reading sample absorbance
at 420 nm, using a spectrophotometer. We used fir-wood boards to determine
whether spent coffee blends may be used for the beautification and
protection of wood. The contact angle was measured and values ranging from
63°and 83° were read for the treated plates, whereas the value on the
untreated control plate was 52°. These results confirm that the spent coffee
blends could be used to beautify and protect wood.
Keywords: spent coffee
blends; physico-chemical characterization; density; viscosity; browning
index; contact angle keywords.
TiO2_W Material Used as Adsorbent and/or Photocatalyst in Water Depollution
AMALIA MARIA SESCU, "Gheorghe Asachi" Technical University of Iași,
"Cristofor Simionescu" Faculty of Chemical Engineering and Environmental
Protection
LIDIA FAVIER, Ecole Nationale Supérieure de Chimie de Rennes,
CNRS, ISCR – UMR6226
DOINA LUTIC, "Alexandru Ioan Cuza" University of
Iași, Faculty of Chemistry
GABRIELA CIOBANU, "Gheorghe Asachi" Technical
University of Iași, "Cristofor Simionescu" Faculty of Chemical Engineering
and Environmental Protection
MARIA HARJA, "Gheorghe Asachi" Technical
University of Iași, "Cristofor Simionescu" Faculty of Chemical Engineering
and Environmental Protection,
mharja@tuiasi.ro
pages 59 - 66 Download
Abstract
This work highlights the performance of TiO2_W material as
adsorbent and photocatalyst. The titanium dioxide was synthesized by sol-gel
method from titanium (IV) butoxide (TIBT) in presence of
cetyl-trimethyl-ammonium bromide (CTAB). The TiO2_W composite was obtained
by doping the titanium dioxide using Na2WO4 as precursor. The UV-DR and BET
analysis were used for the characterization of the obtained materials. Their
adsorption and photocatalytic efficiencies were investigated in a series of
laboratory tests performed with and without UV-A irradiation. The target
molecule was Rhodamine 6G (R6G). Experimental results clearly demonstrated
that the presence of WO3 strongly enhances the dye uptake from diluted
aqueous solutions. It was found that the sample doped with W posed high
performance in adsorption (after 30 min, the adsorption efficiency is over
80%), while the undoped TiO2 exhibits higher photocatalytic activity for
R6G. The experimental data suggested the superiority of combined
adsorption-photocatalysis in the persistent organic compounds removal. The
obtained materials can be successfully used for future applications in
advanced wastewater treatment.
Keywords: adsorption; wolfram doping;
photocatalysis; Rhodamine 6G; titanium dioxide.