2016, Volume 62(66), Issue 1 (March)
Contents
pages 1- 8 Download
Research Regarding the Estimated Relationship Between Soil Salinity Indices
MARIA CĂTĂLINA PASTIA, "Gheorghe Asachi" Technical
University of Iaşi, Romania, Faculty of Hydrotechnical Engineering, Geodesy
and Environmental Engineering, mariapastia@yahoo.com
FLORIAN STĂTESCU,
"Gheorghe Asachi" Technical University of Iaşi, Romania, Faculty of
Hydrotechnical Engineering, Geodesy and Environmental Engineering
VASILE LUCIAN PAVEL,
"Gheorghe Asachi" Technical University of Iaşi, Romania, Faculty of
Hydrotechnical Engineering, Geodesy and Environmental Engineering
LAURA
BULGARIU, "Gheorghe Asachi" Technical University of Iaşi, Romania,
Faculty of Chemical Engineering and Environmental Protection
SABINA IOANA COJOCARU,
"Alexandru Ioan Cuza" University of Iaşi, Romania, Faculty of
Biology
pages 9 - 16 Download
Abstract
Despite salinization is one of the most widespread soil
degradation processes and affects between 1 and 3 million hectares
in the European Union, the measurement of exchangeable cations
concentration of soil generates some problems related to the
intensity and duration of these laboratory tests for determination.
In these context it is desirable to determine relationships between
certain models of soil salinity indices. One of these indicators is
soil Exchangeable Sodium Percentage (ESP), which is determined using
laborious and time consuming laboratory tests. Therefore it may be
more appropriate and economical to develop a relationship which uses
a more simple soil salinity indicator. Therefore, the main objective
of this study is to propose a pattern ESP-SAR for salinized soils
from investigated perimeter of Osoi-Moreni, Iaşi County, Romania.
The research required the use of pairs of samples, which were
collected and processed as the indicated above, to compare ESP
values measured by laboratory tests with data from the application
of the linear regression equation SAR-ESP. The Bland-Altman method
(Bland and Altman, 1999) was used to compare the results from
laboratory tests with the results of SAR-ESP model. Statistical
analyzes were performed using Microsoft Excel (version 2010).
Keywords: Sodium absorption ratio; Exchangeable sodium percentage;
Soil.
Synthesis of 4’-Aminophenyl Benzimidazole
CORINA CERNĂTESCU, "Gheorghe Asachi" Technical University
of Iaşi, Romania, Faculty of Chemical Engineering and Environmental
Protection
MARIUS CĂTĂLIN CLOŞCĂ, "Gheorghe Asachi" Technical
University of Iaşi, Romania, Faculty of Chemical Engineering and
Environmental Protection
CLAUDIA COBZARU, "Gheorghe Asachi" Technical
University of Iaşi, Romania, Faculty of Chemical Engineering and
Environmental Protection,
ccobzaru@yahoo.com
pages 17 - 26 Download
Abstract
In order to synthesize new azomethines derivate from p-
aminophenyl benzimidazole we tried to obtain the benzimidazole using
synthetic paths from scientific literature. Three different
synthetic methods have been used, the optimal method has been
selected and the obtained product was purified by different means in
order to establish the best solvent. The samples were analysed by
the means NMR spectrometry.
Keywords: p-aminophenyl
benzimidazole; different synthetic methods; NMR spectra.
Adsorption of Crystal Violet Dye onto Modified Ash
MARIA HARJA, "Gheorghe Asachi" Technical University of Iaşi,
Romania, Faculty of Chemical Engineering and Environmental Protection
GABRIELA CIOBANU,
"Gheorghe Asachi" Technical University of Iaşi, Romania, Faculty of Chemical
Engineering and Environmental Protection
LIDIA FAVIER, "Ecole Nationale Supérieure de Chimie de
Rennes, CNRS, France
LAURA BULGARIU,
"Gheorghe Asachi" Technical University of Iaşi, Romania, Faculty of Chemical
Engineering and Environmental Protection
LĂCRĂMIOARA
RUSU, "Vasile Alecsandri" University of Bacău, Romania, Faculty of
Engineering, listrati@ub.ro
pages 27 - 37 Download
Abstract
In the present study, the dye adsorption from aqueous
solution, using available resources such as crystal violet as model
colorant and ash/modified ash as low cost sorbent from a local power
plant. The adsorbent was prepared by the alkaline method and
investigated using scanning electron microscopy (SEM-EDX), X-ray
diffraction (XRD) and Brunauer- Emmett - Teller (BET) methods. The
adsorbent in this study had a specific surface area of 41 m2·g-1.
The influence of several experimental conditions (initial pH,
adsorbent dose, initial dye concentration, contact time) on dye
removal rate was determined via batch adsorption experiments. The
highest dye removal rate obtained was about 92% at pH = 10 and
ambient temperature. The results obtained in this study confirm the
potential of modified ash to be used as efficient adsorbent for the
removal of crystal violet dye from aqueous solution.
Keywords:
modified waste ash; crystal violet dye; adsorption; factor
influence; removal rate.
Challenges of the New Sensors: Nucleobases Containing Materials
ELENA LUIZA EPURE, "Gheorghe Asachi" Technical University of Iaşi, Romania, Faculty of Chemical Engineering and Environmental Protection, lepure@tuiasi.ro
pages 39 - 44 Download
Abstract
The miniaturizing is an important request nowadays.
Sophisticated nano-structures are obtained by top-down or bottom-up
approach, growing the number of application in various domains like
biology, medicine, environmental, information technologie. Due to
the simplicity and multiple H- bonding, the nucleobases are very
suitable molecules for programmed self- assembled structures.
Synthetic chemists encouraged by the vast potential of nucleobases
application are in continuum search to apply the recognitive
function of these complementary pairs in various domains like
self-healing, medical diagnosis, sensors, drug delivery, information
storage, purification etc. This review highlights some important
recent developments of the nucleobases applications.
Keywords:
nucleobases; supramolecular; nanostructures; self-assembling.
Phenol and Colour Removal from Wastewater Using Two Coal-Based Adsorptive Materials: Preliminary Laboratory Tests and Performances
CARMEN ZAHARIA, "Gheorghe Asachi" Technical University of Iaşi, Romania, Faculty of Chemical Engineering and Environmental Protection, czah@ch.tuiasi.ro
pages 45 - 57 Download
Abstract
Some preliminary laboratory scale set-up results of
adsorption process performance using different types of coal, as
carbonaceous adsorbents, meaning powder activated charcoal (PAC), or
granular activated charcoal (GAC) and mezotrophic peat (MP), applied for
phenol and color removal from different high phenol-containing synthetic and
real wastewaters were summarized. The influence of high phenol concentration
in some adsorption processes applied for synthetic wastewaters (i.e.
10-3,000 mg/L phenol-containing solutions) and real wastewaters (i.e.
wastewaters produced in manufacturing of wood fibrous plates, in a furniture
processing plant, which was contained a known phenol concentration of 3,000
mg phenol/L) were studied in order to obtain a laboratory estimation of
highest performance in phenol removal and its discoloration. The highest
phenol removal efficiency, working with a dose of 50 g/L PAC, was of 99.875%
in the case of 100 mg/L phenol-containing solutions, 80.70% in the case of
278 mg/L phenol-containing solutions with 50 g/L GAC, and 60.42% in the case
of 2000 mg/L phenol-containing solutions with 50 mg/L MP. For the studied
real wastewater containing around 3,000 mg/L phenol, the highest removal was
of 73.46% for color with PAC, and 57.58% with MP, after 60 min (50.83% after
10 min), and of 95.19% phenol with PAC and 63.30% with MP, after 60 min.
These data were useful in preparation of future experiments, and also of
in-deep adsorption mechanism characterization for high phenol- containing
industrial effluents, its optimization and industrial applications of
adequate operating conditions.
Keywords: adsorption; powder (PAC) and
granular (GAC) activated charcoal; mezotrophic peat (MP); phenol and color
removal; wastewater treatment.