JSCS - Vol 75, No 4

JSCS Vol 75, No. 4

Whole issue - PDF 3,332 KB

J. Serb. Chem. Soc. 75 (4) 423–431 (2010)
UDC 678.746+546.62’131:544.478+547.756; JSCS–3975; doi: 10.2998/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: 10.2998/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: 10.2998/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.

J. Serb. Chem. Soc. 75 (4) 475–482 (2010)

UDC 547.442+542.913:542.9+547.571+547.551:615.282; JSCS–3980; doi: 10.2998/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.

J. Serb. Chem. Soc. 75 (4) 483–495 (2010)

UDC 54–145.2+615.2:54.02:001.891.53; JSCS–3981; doi: 10.2998/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: 10.2998/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: 10.2998/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: 10.2998/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: 10.2998/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/U_mF (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: 10.2998/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: 10.2998/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 R_max 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: 10.2998/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: 10.2998/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

Society Home Page

Journal Home Page