JSCS Vol 75, No. 4
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J. Serb. Chem. Soc. 75 (4) 423–431 (2010)
UDC 678.746+546.62’131:544.478+547.756;
JSCS–3975; doi: 10.2298/JSC090831026T;
Original scientific paper
Polystyrene-supported aluminum chloride
as an efficient and reusable catalyst for condensation of indole with various
carbonyl compounds
BAHMAN TAMAMI, AMIR NASROLAHI SHIRAZI and KAVEH PARVANAK BORUJENI*
Department of Chemistry, Shiraz University, Shiraz 71454,
Iran
*College of Science, Shahrekord University, Shahrekord
115, Iran
(Received 31 August 2009, revised 8 February 2010)
Crosslinked polystyrene-supported aluminum chloride
(PS–AlCl3) is a stable, recyclable and environmental friendly
heterogeneous catalyst for the condensation of indole with aldehydes and
ketones to afford diindolylmethanes. In addition, PS–AlCl3 shows
satisfactory selectivity in the reaction of mixtures of an aldehyde and a
ketone with indole. Although AlCl3 is water sensitive, corrosive and
environmentally harmful compound, PS–AlCl3 is a stable and
water-tolerant species. The mild reaction conditions, short reaction times,
easy work-up, high to excellent yields, chemoselectivity, reuse of the catalyst
for at least ten times without significant change in its catalytic activity,
low cost, and easy preparation and handling of the polymeric catalyst are
obvious advan-tages of the present method.
Keywords: bis-indolylmethanes; indole; polystyrene; aluminum
chloride.
Full
Article - PDF 213 KB Available OnLine: 10. 03. 2010.
J. Serb. Chem. Soc. 75 (4)
433–440 (2010)
UDC 547.93+541.183:57.04:547.933;
JSCS–3976; doi: 10.2298/JSC080810029P; Original
scientific paper
Influence of bile acids on the
adsorption of lidocaine and verapAMil in an in
vitro experiment
MIHALJ M. POŠA and KSENIJA N. KUHAJDA*
Department of Pharmacy, Faculty of Medicine, University of Novi Sad, Hajduk Veljkova
3, 21000 Novi Sad, Serbia
*Department of Chemistry, Faculty of Sciences,
University of Novi Sad, Trg D. Obradovića 3, 21000 Novi Sad, Serbia
(Received 10 August, revised 6 October
2009)
The work is concerned with the influence of the
structure of bile acids (cholic, deoxycholic, chenodeoxycholic, and their keto
derivatives) on the in vitro
adsorption of lidocaine and verapAMil from an aqueous phase to rat’s intestine
membrane. Transport of lidocaine from an aqueous medium to the rat’s intestine
membrane was significantly increased (p
< 0.05) only by 7-ketodeoxycholic acid, whereas an analogous increase in
verapAMil transport was produced only by cholic acid. It appeared that, of all
the tested bile acids, these two acids form the most stable complexes (by
hydrogen bonds) with the respective drug.
Keywords:
lidocaine; verapAMil; bile acids.
Full
Article - PDF 296 KB Available OnLine: 18. 03. 2010.
J. Serb. Chem. Soc. 75 (4)
441–447 (2010)
UDC 665.52/.54:635.71(540); JSCS–3977; doi:
10.2998/JSC090814023V;
Original scientific paper
Changes in the essential oil composition of Majorana hortensis Moench. cultivated in
India during plant ontogeny
RAM S. VERMA, RAJESH K. VERMA, AMIT CHAUHAN and AJAI
K. YADAV
Central Institute of Medicinal and Aromatic Plants,
Resource Centre Purara, P.O. – Gagrigole, Bageshwar, Uttrakhand-263688, India
(Received 14 August, revised 7 October
2009)
The essential oil content and composition of “sweet
marjorAM” (Majorana hortensis
Moench.) cultivated in the Kumaon region of the western Himalayas was studied at
different ages of the crop. The sAMples were taken after 60, 90, 120 and 150
days of transplanting. The essential oil contents varied from 0.20 to 0.70 %.
The essential oil was analyzed by GC and GC–MS. Twenty eight components,
representing 96.53–98.44 % of the oil, were identified. The major essential oil
constituents, viz., cis-sabinene hydrate (37.05–47.49 %),
terpinen-4-ol (14.45–16.22 %) and trans-sabinene
hydrate (5.81–6.97 %) showed considerable variation in their concentrations in
relation to crop age.
Keywords:
Majorana hortensis; LAMiaceae; crop age;
essential oil content; GC–MS.
Full Article - PDF 204 KB Available
OnLine: 10. 03. 2010.
J. Serb.
Chem. Soc. 75 (4) 449–458 (2010)
UDC 633.15:631.547.3:631.55:664.25;
JSCS–3978; doi: 10.2298/JSC090904027M; Original scientific paper
Effects of autoclaving and pullulanase
debranching on the resistant starch yield of normal maize starch
MARIJA S. MILAŠINOVIĆ, MILICA M. RADOSAVLJEVIĆ and LJUBICA P. DOKIĆ*
Maize Research Institute, Zemun Polje,
Slobodana Bajića 1, Belgrade-Zemun, Serbia
*Faculty of Technology, University of
Novi Sad, Bul. Cara Lazara 1, Novi Sad, Serbia
(Received 4 September, revised 2
November 2009)
In this
study, resistant starch (RS), type 3, was prepared by the autoclaving and
debranching of normal maize starch isolated from a selected ZP genotype. The
objectives of this study were to optimize both starch autoclaving and
debranching with pullulanase (PromozymeBrewQ) for the production of RS.
Autoclaving at 120 °C (30 min) increased the RS content of all sAMples,
whereas freezing at –20 °C did not have an obvious effect on the RS contents.
The highest RS yield in the autoclaved starch sAMples was 7.0 % after three
autoclaving–cooling cycles. After pullulanase debranching at 50 °C and
retrogradation at 4 °C, the RS yields ranged from 10.2 to 25.5 % in all sAMples
(depending on the hydrolysis time). Debranched starch sAMples with a maximum RS
yield of 25.5 % were obtained after a debranching time of 24 h. This study
showed that starch from the selected ZP maize genotype is suitable for
pullulanase treatment and RS preparation but that additional studies with a
greater number of different treatments (incubation time/temperature) are
necessary to manipulate and promote crystallization and enhance RS formation.
Keywords: maize starch; autoclaving; debranching; pullulanase;
resistant starch.
Full Article - PDF 227 KB Available OnLine: 10. 03. 2010.
J. Serb. Chem. Soc. 75 (4) 459–473 (2010)
UDC 546.11+547.581.2:541.49:548.7;
JSCS–3979; doi: 10.2298/JSC090416011Z;
Original scientific paper
Crystal engineered acid–base complexes
with 2D and 3D hydrogen bonding systems using p-hydroxybenzoic acid as the building block
PU SU ZHAO, XIAN WANG, FANG FANG JIAN, JUN LI ZHANG and HAI LIAN XIAO
New Materials and Function Coordination Chemistry Laboratory, Qingdao
University of Science and Technology, Qingdao Shandong 266042, P. R. China
(Received 16 April, revised 21 September
2009)
p-Hydroxybenzoic acid (p-HOBA) was selected as the
building block for self-assembly with five bases, i.e., diethylAMine, tert-butylAMine,
cyclohexylAMine, imidazole and piperazine, and generation of the corresponding
acid–base complexes 1–5. Crystal
structure analyses suggest that proton-transfer from the carboxyl hydrogen to
the nitrogen atom of the bases can be observed in 1–4, while only in 5
does a solvent water molecule co-exist with p--HOBA
and piperazine. With the presence of O–H···O hydrogen bonds in 1–4, the deprotonated p-hydroxybenzoate anions (p-HOBAA–)
are simply connected each other in a head-to-tail motif to form one-dimensional
(1D) arrays, which are further extended to distinct two-dimensional (2D) (for 1 and 4) and three-dimensional (3D) (for 2 and 3) networks via
N–H···O interactions. While in 5, neutral acid and base are combined pair-wise
by O–H···N and N–H···O bonds to form a 1D tape and then the 1D tapes are
sequentially combined by water molecules to create a 3D network. Some
interlayer or intralayer C–H···O, C–H···p and p×××p interactions help to stabilize the
suprAMolecular buildings. Melting point determination analyses indicate that
the five acid–base complexes are not the ordinary superposition of the
reactants and they are more stable than the original reactants.
Keywords: hydrogen bonding; crystal structure; suprAMolecular; p-hydroxybenzoic acid.
Full Article - PDF 707 KB Available OnLine: 10. 03. 2010.
UDC
547.442+542.913:542.9+547.571+547.551:615.282; JSCS–3980; doi: 10.2298/JSC091021028S; Original scientific paper
Macrocyclic complexes: synthesis and characterization
DHARMPAL SINGH and KRISHAN KUMAR
Department of Chemistry,
National Institute of Technology, Kurukshetra – 136 119, India
(Received 21 October 2009, revised 12 January
2010)
A novel series of complexes of the type [M(C28H24N4)X]X2,
where M = Cr(III), Fe(III) or Mn(III), X = Cl−, NO3−,
CH3COO− and (C28H24N4)
corresponds to the tetradentate macrocyclic ligand, were synthesized in
methanolic media by the template condensation of 1,8-diAMinonaphthalene and
2,3-butanedione (diacetyl) in the presence of trivalent metal salts. The
complexes were characterized by elemental analyses, conductance and magnetic
measurements, and UV/Vis and IR spectroscopy. Based on these studies, a
five-coordinate square pyrAMidal geometry for all the prepared complexes is
proposed. All the synthesized macrocyclic complexes were tested for their in
vitro antifungal activity against some fungal strains viz. Aspergillus
niger and A. fumigatus. The results obtained were compared with the
standard antifungal drug fluconazole.
Keywords: antifungal activity; 2,3-butanedione;
template synthesis; macrocyc¬lic Schiff-base complexes.
Full Article - PDF 187 KB Available OnLine: 10. 03. 2010.
UDC
54–145.2+615.2:54.02:001.891.53; JSCS–3981; doi: 10.2298/JSC090809022E; Original scientific paper
The importance of the accuracy of the experimental data for the
prediction of solubility
SLAVICA ERIĆ, MARKO KALINIĆ, ALEKSANDAR POPOVIĆ, HALID
MAKIĆ*, ELVISA CIVIĆ* and MEJRA BEKTAŠEVIĆ*
Faculty of Pharmacy, University
of Belgrade, Vojvode Stepe 450, 11000 Belgrade, Serbia
*Biotechnical Faculty,
University of Bihać, Kulina Bana 2, 77000 Bihać, Bosnia and Herzegovina
(Received 9
August, revised 7 October 2009)
Aqueous
solubility is an important factor influencing several aspects of the
pharmacokinetic profile of a drug. Numerous publications present different
methodologies for the development of reliable computational models for the
prediction of solubility from structure. The quality of such models can be significantly
affected by the accuracy of the employed experimental solubility data. In this
work, the importance of the accuracy of the experimental solubility data used
for model training was investigated. Three data sets were used as training sets
– data set 1, containing solubility data collected from various literature
sources using a few criteria (n = 319), data set 2, created by
substituting 28 values from data set 1 with uniformly determined experimental
data from one laboratory (n = 319), and data set 3, created by including
56 additional components, for which the solubility was also determined under
uniform conditions in the sAMe laboratory, in the data set 2 (n = 375).
The selection of the most significant descriptors was performed by the
heuristic method, using one-parAMeter and multi-parAMeter analysis. The
correlations between the most significant descriptors and solubility were
established using multi-linear regression analysis (MLR) for all three
investigated data sets. Notable differences were observed between the equations
corresponding to different data sets, suggesting that models updated with new
experimental data need to be additionally optimized. It was successfully shown
that the inclusion of uniform experimental data consistently leads to an
improvement in the correlation coefficients. These findings contribute to an
emerging consensus that improving the reliability of solubility prediction
requires the inclusion of many diverse compounds for which solubility was
measured under standardized conditions in the data set.
Keywords: aqueous solubility
prediction; experimental data; model training; heuristic method.
Full Article - PDF 343 KB Available OnLine: 10. 03. 2010.
J. Serb. Chem. Soc. 75 (4) 497–504 (2010)
UDC 547.288.15+546.26-162-31:541.121:536.7;
JSCS–3982; doi: 10.2298/JSC090408009M; Original
scientific paper
HexAMethylenetetrAMine reaction with
graphite oxide (GO) as a strategy to increase the thermal stability of GO:
synthesis and characterization of a compound
ROBSON F. de
FARIAS and CLAUDIO AIROLDI*
DepartAMento de
Química, Universidade Federal do Rio Grande do Norte, Cx. Postal 1662,
59078-970 Natal, Rio Grande do Norte, , Brazil
*Instituto de Química,
UNICAMP, Cx. Postal 1664, 13083-97170 CAMpinas, São Paulo, Brazil
(Received 17 July, revised 23 September 2009)
In this paper, the synthesis and
characterization of a GO–hmta compound (GO – graphite oxide; hmta –
hexAMethylenetetrAMine) are presented. It is shown that the presence of hmta
molecules inside the GO matrix, with very strong interactions, stabilize the GO
matrix from a thermal point of view. Such a fact could be used to explore
possible applications of GO matrix, especially in catalysis.
Keywords: graphite oxide; hexAMethylenetetrAMine; thermal
stability.
Full Article - PDF 295 KB Available OnLine: 10. 03. 2010.
J. Serb. Chem. Soc. 75 (4)
505–512 (2010)
UDC 620.193:546.226–325:546.131:091.5+681.32;
JSCS–3983; doi: 10.2298/JSC090627016W; Original scientific paper
Digital
holographic reconstruction detection of localized corrosion arising from
scratches
LIANG WANG*, SHENHAO CHEN*,**,
BOYU YUAN***, FANJIANG MENG**, JIANQIU WANG*, CHAO WANG**,**** and
LIANG LI****
*Department of Chemistry,
Shandong University, Jinan 250100, P. R. China
**State Key Laboratory for
Corrosion and Protection, Shenyang 110016, P. R. China
***Department of Physics,
Xuzhou Normal University, Xuzhou 221116, P. R. China
****Department of
Chemistry, Xuzhou Normal University, Xuzhou 221116, P. R. China
(Received 27 June, revised
18 October 2009)
In this study,
electrochemical methods and the digital holographic reconstruction technique
were combined to detect the localized scratch-induced corrosion process of
Alloy 690 in 0.50 mol dm-3 H2SO4 containing
0.10 mol dm-3 NaCl. The numerical reconstruction method has been
proved to be an effective technique to detect changes of solution
concentration. One can obtain direct information from the reconstructed images
and capture subtle more revealing changes. It provides a method to detect
localized corrosion arising from scratches.
Keywords: digital holography; numerical reconstruction;
Alloy 690; scratch corrosion.
Full Article - PDF 678 KB Available OnLine: 10. 03. 2010.
J. Serb. Chem. Soc. 75 (4)
513–521 (2010)
UDC
546.733’763’963’+547.442:543.544.943.068.7:532.74; JSCS–3984, doi: 10.2298/JSC090225002B; Original
scientific paper
Prediction of the retention
of β-diketonato complexes in TLC systems on silica gel by quantitative
structure–retention relationships
RADA M. BAOŠIĆ, ANA D.
RADOJEVIĆ and ŽIVOSLAV LJ. TEŠIĆ
Faculty of Chemistry, University
of Belgrade, Studentski trg 12, P.O. Box 158, 11000 Belgrade, Serbia
(Received 25 February,
revised 9 December 2009)
Quantitative
structure–retention relationships for a series of 30 mixed β-diketonato complexes
of cobalt(III), chromium(III) and ruthenium(III) were derived by multiple
linear regression analyses using molecular descriptors obtained by quantum
chemical calculations. The retention parAMeters were obtained by thin layer
chromatography on silica gel using mono and two-component solvent systems. The
molecular descriptors included in the multiple linear regression analysis were
molecular weight, molecular volume, surface area, hydrophilic–lipophilic
balance, percent hydrophilic surface area, dipole moment, polarizability,
refractivity, energy of the highest occupied molecular orbital and energy of
the lowest unoccupied molecular orbital. High agreement between the
experimental and predicted retention parAMeters was obtained when
polarizability and the hydrophilic–lipophilic balance were used as the
molecular descriptors. Comparison of the models with those established on
polyacrylonitrile showed that the structure of the sorbent is responsible for
the chromatographic behaviour of the sAMe compounds. The presented models can
be used for the prediction of the retention of new solutes in screening
chromatographic systems.
Keywords: quantitative structure–retention relationship; β-diketonato
complexes; molecular descriptors; thin layer chromatography.
Full Article - PDF 414 KB Available OnLine: 10. 03. 2010.
J. Serb. Chem. Soc. 75 (4) 523–535 (2010)
UDC
633+632.95:628.31:662.61:544.27; JSCS–3985; doi: 10.2298/JSC090820024A; Original
scientific paper
Fluidized bed combustion of
pesticide-manufacture liquid wastes
ZORANA ARSENIJEVIĆ, ŽELJKO
GRBAVČIĆ*, BOŠKO GRBIĆ, NENAD RADIĆ, RADMILA GARIĆ-GRULOVIĆ, SAŠA MILETIĆ**,
GORDAN SAVČIĆ** and BOJANA
ĐORĐEVIĆ**
Institute of Chemistry,
Technology and Metallurgy – Department of Catalysis and Chemical Engineering,
University of Belgrade, Njegoševa 12, Belgrade, Serbia
*Faculty of Technology and
Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade, Serbia
**Galenika – Fitofarmacija
A.D., Batajnički drum bb, Belgrade, Serbia
(Received 20 August,
revised 4 November 2009)
Industrial liquid wastes
can be in the form of solutions, suspensions, sludges, scums or waste oil and
have organic properties. The objective of this work was to demonstrate the
technical feasibility of a fluidized bed as a clean technology for burning
liquid waste from a pesticide production plant. The combustion of liquid waste
mixtures, obtained from realistic sAMples, was investigated in a pilot scale
fluidized bed with quartz sand particles of 0.63–1.25 mm in diAMeter and 2610
kg/m3 in density at 800–950 °C. To ensure complete combustion of
liquid waste and additional fuel, the combustion chAMber was supplied with
excess air and the U/UmF (at AMbient temperature) was
in between 1.1 and 2.3. In the fluidized bed chAMber, liquid waste, additional
liquid fuel and air can be brought into intense contact sufficient to permit
combustion in bed without backfire problems. The experimental results show that
the fluidized bed furnace offers excellent thermal uniformity and temperature
control. The results of the combustion tests showed that degradation of liquid
wastes can be successfully realized in a fluidized bed with no harmful gaseous
emissions by ensuring that the temperatures of both the bed and the freeboard
are not lower than 900 °C.
Keywords: fluidized bed incinerator; liquid waste; pesticide
production plant; design; operating experience.
Full Article - PDF 494 KB Available OnLine: 10. 03. 2010.
J. Serb. Chem. Soc. 75 (4) 537–549 (2010)
UDC
678.652+66.095.26:539.12–039.26; JSCS–3986; doi: 10.2298/JSC090527012S; Original
scientific paper
Polyaniline–multi-wall-carbon
nanotube nanocomposites as a dopAMine sensor
REZA EMAMALI SABZI*,**,
KAMRAN REZAPOUR* and NASER SAMADI*
*Department of Chemistry,
Faculty of Science, Urmia University, Urmia, Iran
**Institute of
Biotechnology, Urmia University, Urmia, Iran
(Received 27 May, revised 6
November 2009)
A composite of polyaniline
with multi-wall-carbon nanotubes (PANi/ /MWCNTs) was synthesized by an in
situ chemical oxidative polymerization method. The PANi nanoparticles were
synthesized chemically using aniline as the monomer and AMmonium
peroxydisulfate as the oxidant. The nanocomposites were prepared as a carbon
paste using functionalized MWCNTs and PANi nanoparticles. The PANi–MWCNTs were
characterized physically using scanning electron microscopy (SEM) and the
electrochemical behavior of the composites in acidic solution (HCl) was
investigated using cyclic voltAMmetry. The PANi/MWCNT composite electrode was
used for studying dopAMine (DA) as an electroactive material. The cyclic
voltAMmetric results indicated that multi-wall carbon nanotubes (MWCNTs)
significantly enhanced the electrocatalytic activity in favor of the oxidation
of DA. The kinetics of the catalytic reaction was investigated using the
chronoAMperometry technique whereby the average va¬lue of the diffusion
coefficient (D) and the catalytic rate constant (k) for DA were
determined to be (7.98±0.8)×10-7 cm2 s-1 and (8.33±0.072)×104
dm3 mol-1 s-1, respectively.
Keywords: multi-wall-carbon nanotubes; dopAMine;
nanocomposite; polyaniline; sensor.
Full Article - PDF 335 KB Available OnLine: 10. 03. 2010.
J. Serb. Chem. Soc. 75 (4) 551–564 (2010)
UDC
628.316:546.766+582.282.123.4; JSCS–3987; doi: 10.2298/JSC090331008G; Original
scientific paper
Hexavalent chromium removal
by waste mycelium of Aspergillus awAMori
VELIZAR K. GOCHEV, ZDRAVKA
I. VELKOVA* and MARGARITA S. STOYTCHEVA**
Department of Biochemistry
and Microbiology, Paisii Hilendarski University of Plovdiv, Tzar Asen Str. 24,
Plovdiv 4000, Bulgaria
*Department of Inorganic
and Physical Chemistry, University of Food Technologies, Maritza Boulevard 26,
Plovdiv 4000, Bulgaria
**University of Baja
California, Mexicali, Mexico
(Received 31 March, revised
15 July 2009)
In this study, the Cr(VI)
removal potential of waste mycelium from the industrial xylanase-producing
strain Aspergillus awAMori was evaluated. It was determined by FTIR
analysis that AMino groups from the major fungal wall constituents, chitin and
chitosan, played a key role in the metal binding process. The effect of pH,
initial ion concentration, temperature and AMount of biomass on the removal was
also studied. The removal efficiency increased with decreasing pH and
increasing temperature and AMount of biomass. The mechanism of Cr(VI) removal
by A. awAMori can be explained by a two-stage process involving an
initial adsorption stage followed by a reducing stage. The removal process was
described by a second-order polynomial and the optimal process parAMeters for
attaining Rmax 94.4 % in 48 h were predicted, i.e., pH 1.5
and t = 40 °C. From both economic and ecological points of
view, a promising possibility for the utilization of waste industrial mycelium
of A. awAMori as a low-cost Cr(VI) removal agent was proposed.
Keywords: Aspergillus awAMori; Cr(VI) removal; waste
fungal mycelium.
Full Article - PDF 266 KB Available OnLine: 10. 03. 2010.
J. Serb. Chem. Soc. 75 (4) 565–573 (2010)
UDC
632.95–039.7.004.74+661.183.2+541.183:543.544.3; JSCS–3988; doi: 10.2298/JSC090615014N; Original
scientific paper
Removal of organochlorine
pesticides from water using virgin and regenerated granular activated carbon
MIRJANA B. NINKOVIĆ, RADA
D. PETROVIĆ* and MILA D. LAUŠEVIĆ*
Belgrade Waterworks and
Sewerage, Deligradska 28, 11000 Belgrade, Serbia
*Faculty of Technology and
Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
(Received 15 June, revised
3 September 2009)
Public water systems use
granular activated carbon in order to eliminate pesticides. After saturation,
the used activated carbon is regenerated and reused in order to reduce the
costs of water production and minimize waste. In this study, the adsorption of
10 different chlorinated pesticides from water using columns packed with
commercial virgin and regenerated granular activated carbon was simulated in
order to compare their adsorption capacities for different chlorinated
pesticides. The breakthrough curves showed that chlorinated pesticides from the
group of hexachlorocyclohexane (HCH) were poorly adsorbed, followed by cyclodiens
as averagely adsorbed and the derivatives of halogenated aromatic hydrocarbons
(DDT) as strongly adsorbed. However, the adsorption capacity of regenerated
granular activated carbon was considerably lower for tested pesticides compared
to the virgin granular carbon. In addition, rinsing of the pesticides after the
saturation point is a far more efficient process on regenerated carbon.
Keywords: granular activated carbon; adsorption;
organochlorine pesticides; gas chromatography.
Full Article - PDF 211 KB Available OnLine: 10. 03. 2010.
J. Serb. Chem. Soc. 75 (4) 575–586 (2010)
UDC
632.951–039.7+661.183.2:628.1.033:628.161.2; JSCS–3989; doi: 10.2298/JSC090602013M; Original
scientific paper
Purification of
waters and elimination of organochloric insecticides by means of active coal
DRAGAN MARINOVIĆ, MARINA
STOJANOVIĆ* and DANILO POPOVIĆ*
Public Health Institute,
Slobodana Penezića 16, 36000 Kraljevo, Serbia
*Faculty of Occupational
Safety, University of Niš, Čarnojevića 10a, 18 000 Niš, Serbia
(Received 2 June, revised 7
October 2009)
Pollution of water and the
determination of the degree of its pollution with numerous physical, chemical
and biological polluters have become general, ever increasing social and health
related problems. Within this study, the concentrations of some most frequently
used organochloric insecticides (OCI): a-hexachlorocyclohexane (a-HCH), γ-hexachlorocyclohexane
(lindane), heptachlor, aldrin, dieldrin, endrin, dichlorodiphenyl
trichlorethane (DDT) were investigated. OCI are highly toxic substances for the human population
and their effective elimination from the environment is of parAMount interest.
To determine the OCI concentration in water sAMples, the EPA–608 method and the
liquid–liquid extraction principle were applied. A procedure for OCI
elimination was realized by passing the water over four columns filled with
various active coals: KRF, K-81/B, NORIT ROW-0.8 and AQUA SORB CS. These active
coals are carbonized coconut shells activated by different procedures. The
obtained results indicated that best purification of potable and waste water
achieved using a column with Norit Row-0.8 filling. Research proved that small
quantities of OCI can also be effectively removed using a Norit Row-0.8 active
coal filled column, without altering the organoleptic properties of the water,
which meets the requirements of water purification processes.
Keywords: potable (drinking) water; waste water;
organochloric insecticides; waters purification; active coal; gas
chromatography.
Full Article - PDF 288 KB Available OnLine: 10. 03. 2010.
J. Serb. Chem. Soc. 75 (4) 587–594 (2010)
UDC 543+061.3(4);
JSCS–3989; EuCheMS news
EUCHEMS NEWS
European Analytical
Column no. 38 from the Division of Analytical Chemistry (DAC) of the European
Association for Chemical and Molecular Sciences (EuCheMS), January 2010
BO KARLBERG, PAUL WORSFOLD*
and JENS E. T. ANDERSEN***
Department of Analytical
Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
*School of Geography, Earth
and Environmental Sciences, University of Plymouth, Plymouth PL4 8AA, UK
**Department of Chemistry,
Technical University of Denmark, Building 207, DK-2800 Lyngby, Denmark
January 2010
The Euroanalysis conference
series constitutes the cornerstone activity of the Division of Analytical
Chemistry (DAC) of the European Association for Chemical and Molecular Sciences
(EuCheMS). Hence this column reports on the last Euroanalysis conference held
in Innsbruck, Austria, in September 2009. The present column also follows up
the pattern from the previous two columns; nAMely to invite a European
analytical chemist to give his or her view on a certain topic of interest. This
time Professor Paul Worsfold gives his personal view on water quality in the
developing world.
Full
Article - PDF 158 KB
Copyright
&AMp; copy; SHD 2010.
April 21, 2010.
For more information contact: JSCS-info@shd.org.rs