JSCS Vol 78, No. 8

 

Whole issue - PDF  4,284 KB

J. Serb. Chem. Soc. 78 (8) 1079–1117 (2013)

UDC 536.7+53+512.62:541.135.1+54–145.2; JSCS–4482; doi:10.2298/JSC130130029D Authors’ review

 

AUTHORS’ REVIEW

Prediction of thermophysical and transport properties of ternary organic non-electrolyte systems including water by polynomials

BOJAN D. DJORDJEVIĆ, MIRJANA Lj. KIJEVČANIN, IVONA R. RADOVIĆ, SLOBODAN P. ŠERBANOVIĆ and ALEKSANDAR Ž. TASIĆ

Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, P. O. Box 35-03, 11120 Belgrade, Serbia

 

(Received 30 January, revised 4 March 2013)

The description and prediction of thermophysical and transport properties of ternary organic non-electrolyte systems including water by polynomial equations are reviewed. Empirical equations of Radojković et al. (also known as Redlich–Kister), Kohler, Jacob–Fitzner, Colinet, Tsao–Smith, Toop, Scatchard et al. and Rastogi et al. are compared with experimental data of available papers that appeared in well know international journals (Fluid Phase Equilibria, Journal of Chemical and Engineering Data, Journal of Chemical ThermodynAMics, Journal of Solution Chemistry, Journal of the Serbian Chemical Society, The Canadian Journal of Chemical Engineering, Journal of Molecular Liquids, Thermochimica Acta, etc.). The applicability of empirical models to estimate excess molar volumes, VE, excess viscosities, Dη, excess free energies of activation of viscous flow, ΔG*E, molar refraction changes on mixing, DR, changes in the refractive indices on mixing, DnD, changes of isentropic compressibility, Δκs, surface tension deviations, Dσ, speed of sound deviations, Du, relative permittivity deviations, σεr, were checked on the series of ternary mixtures of very complex structure, which is described very shortly. The obtained results of prediction are discussed and some recommendations about the use of symmetric or asymmetric models to the possible application to mixtures are made.

 

Keywords: prediction; thermophysical properties; transport properties; polynomials; ternary non-electrolyte systems.

Full Article - PDF  361 KB               Available OnLine: 07. 03. 2013.     Cited by

J. Serb. Chem. Soc. 78 (8) 1119–1125 (2013)

542.913:547.752+547.791+547–304.9; JSCS–4483; doi: 10.2298/JSC120914013G Original scientific paper

 

Synthesis of new functionalized derivatives of 1,2,4-triazolo[4¢,3¢:2,3][1,2,4]triazino[5,6-b]indole

SOBHI M. GOMHA and HATEM A. ABDEL-AZIZ*

Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt

*Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P. O. Box 2457, Riyadh 11451, Saudi Arabia

 

(Received 14 September, revised 3 October 2012)

New functionalized 1,2,4-triazolo[4¢,3¢:2,3][1,2,4]triazino[5,6-b]indole derivatives were synthesized via reaction of the hydrazonoyl halides with 2,4-dihydro-3H-1,2,4-triazino[5,6-b]indole-3-thione or its 3-methylthio derivative. The mechanism and the regioselectivity of the studied reactions are discussed.

 

Keywords: hydrazonoyl halides; 1,2,4-triazino[5,6-b]indole-3-thione; hydrazonothioates.

Full Article - PDF  889 KB               Supplementary Material PDF  152 KB          Available OnLine: 03. 02. 2013.        Cited by

J. Serb. Chem. Soc. 78 (8) 1127–1134 (2013)

UDC 547.78:542.913:615.281:612.064; JSCS–4484; doi: 10.2298/JSC120917126F Original scientific paper

 

Synthesis, spectroscopic characterization and pharmacological evaluation of oxazolone derivatives

GHULAM FAREED*,**, NIGHAT AFZA*, MUHAMMAD ALI VERSIANI**, NAZIA FAREED**, UZMA RASHEED MUGHAL***, MAHBOOB ALI KALHORO*, LUBNA IQBAL* and MEHREEN LATEEF*

*Pharmaceutical Research Center, PCSIR Laboratories Complex Karachi, Shahrah-e-Dr. Salim-uz-ZAMan Siddiqui Karachi-75280, Sindh, Pakistan

**Department of Chemistry, Federal Urdu University of Arts, Science and Technology, Ghulshan-e-Iqbal, Karachi-75300, Sindh, Pakistan

***HEJ Research Institute of Chemistry, ICCBS, University of Karachi, Karachi-75280, Pakistan

 

(Received 17 September, revised 21 November 2012)

A series of six 4-(arylmethylidene)-2-phenyl/methyl-5(4H)-oxazolone derivatives were synthesized using a reported method by condensation of aldehydes with N-benzoyl/N-acetyl glycine in the presence of zinc oxide as a catalyst and acetic anhydride at room temperature in ethanol. Five of the compounds are new derivatives. The structures of the compounds were evaluated based on 1H-NMR, 13C-NMR, EI-MS and FT-IR spectroscopy and elemental analysis. All the compounds were screened for their antibacterial and urease inhibition activity. The antibacterial activity was tested by the agar well diffusion method using Mueller–Hinton agar medium. Compound 2 showed excellent activity against Staphylococcus aureus exhibiting 16 mm (80 %) inhibition and above 24 mm (70 %) against Salmonella typhi. Compound 6 was the most active compound against Escherichia coli having 20 mm (80 %) inhibition followed by compound 5 having above 18 mm (70 %) inhibition. Urease inhibition activity of all the compounds was determined by the indophenol method. Compounds 3, 6 and 7 showed significant inhibition against Jack bean urease.

 

Keywords: aldehyde; antibacterial; urease inhibition activities; oxazolones; synthesis; zinc oxide.

Full Article - PDF  258 KB               Supplementary Material PDF  134 KB          Available OnLine: 19. 11. 2012.        Cited by

J. Serb. Chem. Soc. 78 (8) 1135–1147 (2013)

UDC 628.336+66.094.941+628.356+579.852.11; JSCS–4485; doi: 10.2298/JSC121008024Z Original scientific paper

 

Enhancing the hydrolysis of excess sludge using thermophilic Bacillus sp. Hnu under different oxygen supply conditions

WEI ZHENG, XIAO MING LI*, BING ZHENG LI, HONG YING XU and YA BING GUO

School of Environment and Safety, Taiyuan University of Science and Technology, Taiyuan 030024, P. R. China

*College of Environmental Science and Engineering, Hunan University, Changsha 410082, P. R. China

 

(Received 8 October 2012, revised 14 February 2013)

A thermophilic Bacillus strain was isolated from excess sludge in the present study. A 16S rDNA analysis indicated that this strain was a Bacillus sp. that had not been previously reported (nAMed Bacillus sp. Hnu). The aim of the present study was to investigate the enhanced efficiency of excess sludge hydrolysis by the addition of thermophilic Bacillus sp. Hnu under different oxygen supply conditions. The results indicated that higher temperature and a greater oxygen supply were advantageous for the volatile suspended solid removal ratio, having the sAMe effect to that of protease activity. The maximum volatile suspended solid removal ratio was achieved at 21.5, 42.5 and 54.4 % after 108 h digestion at pH 6.9 and 60 °C and increased by 17.2, 38 and 45.4 % under anaerobic, microaerobic, and aerobic conditions compared with the control test, respectively. The hydrolysis rate constants under anaerobic, microaerobic, and aerobic conditions were 3, 4.8, and 7 times (40 °C), 3.5, 9.8, and 11.8 times (50 °C) and 2.7, 7.2, and 10.3 times (60 °C), respectively. Hydrolysis performance indicated that the Bacillus sp. Hnu could accelerate the hydrolysis rate. The kinetic study showed that the hydrolysis of sludge with Bacillus sp. Hnu and the control test followed first-order kinetics except at 60 °C.

 

Keywords: thermophilic; excess sludge; microaeration; hydrolysis; first-order kinetics.

Full Article - PDF  293 KB               Available OnLine: 21. 02. 2013.        Cited by

J. Serb. Chem. Soc. 78 (8) 1149–1160 (2013)

UDC *Arabidopsis thaliana+664.8.047+66–973; JSCS–4486; doi: 10.2298/JSC121127017B; Original scientific paper

 

Dehydrins (LTI29, LTI30, and COR47) from Arabidopsis thaliana expressed in Escherichia coli protect thylakoid membranes during freezing

VLADAN BOZOVIC, JAN SVENSSON*, JÜRGEN SCHMITT** and CARSTEN KOHN**

University of Montenegro, Biotechnical Faculty, Mihajla Lalića 1, 20000 Podgorica, Montenegro

*Uppsala Genetic Center, Swedish University of Agricultural Sciences, Uppsala S-750 07, Sweden

**Institute for Plant Physiology and Microbiology – Department of Biology, Chemistry and Pharmacy - FU Berlin, Schwendenerstrasse 1, 14195 Berlin, Germany

 

(Received 27 November 2012, revised 5 February 2013)

As the nAMe dehydrins implies, these proteins are typically expressed in response to dehydration, which can be caused by drought, osmotic stress, or freezing temperatures. In general, dehydrins occur in plants as multi-gene fAMilies. Four arabidopsis dehydrins (LTI29, ERD14, COR47 and RAB18) were tested for protection of thylakoid membranes during freeze–thaw cycles in vitro. The first reported results showed that dehydrins LTI29, ERD14, COR47 have cryoprotective activity while RAB18 did not protect the thylakoid membranes at low temperatures. The cryoprotective activity reached a maximum of 50–60 % at a protein concentration of 140–250 µg mL-1 in the assay. A contribution of dehydrins to freezing tolerance in vivo is supported by the observation of Nylander et al. that LTI29 and COR47 are cold induced at the mRNA and protein expression level.

 

Keywords: Arabidopsis thaliana; dehydrins; freezing tolerance; thylakoid; cold acclimation.

Full Article - PDF  432 KB               Available OnLine: 11.02. 2013.         Cited by

J. Serb. Chem. Soc. 78 (8) 1161–1170 (2013)

UDC 546.881.5–31+547.821’461.2’288.2’495.9:548.7:535.33; JSCS–4487; doi: 10.2298/JSC130326038L; Original scientific paper

 

Dioxidovanadium(V) complexes with pyridoxal AMinoguanidine derivative: synthesis and spectral and structural characterization

MIRJANA M. LALOVIĆ, VUKADIN M. LEOVAC, LJILJANA S. VOJINOVIĆ-JEŠIĆ, MARKO V. RODIĆ, LJILJANA S. JOVANOVIĆ and VALERIJA I. ČEŠLJEVIĆ

Faculty of Sciences, University of Novi Sad, Trg D. Obradovića 3, 21000 Novi Sad, Serbia

 

(Received 26 March 2013)

Three square–pyrAMidal complexes of dioxidovanadium(V) with {[(3-hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridyl)methylene]AMino}guanidine (PLAG), of the formulas NH4[VO2(PLAG−2H)]·H2O (1), VO2(PLAG−H) (2) and K[VO2(PLAG−2H)]·H2O (3) were synthesized and characterized by IR and electronic spectra, and in case of 1 and 3 by X-ray crystallography as well. The reaction of aqueous AMmoniacal solution of NH4VO3 and PLAG resulted in formation of 1, which in MeOH undergoes spontaneous transformation into 2, which, in turn, in the reaction with KOH transforms into 3. In these complexes, PLAG is coordinated in a common tridentate ONN mode, via the phenoxide oxygen atom and the nitrogen atoms of the azomethine and imino groups of the AMinoguanidine fragment. In all previously characterized complexes, PLAG was coordinated in the neutral form. However, here it was proven that this ligand could be coordinated in both mono- (2) and doubly-deprotonated forms (1 and 3) as well.

 

Keywords: pyridoxalAMinoguanidine derivative, dioxidovanadium(V), complexes, crystal structure, spectra.

Full Article - PDF  235 KB               Supplementary Material PDF  225 KB          Available OnLine: 15. 02. 2013.        Cited by

J. Serb. Chem. Soc. 78 (8) 1171–1176 (2013)

UDC 546.982+547.313.2+546.131:542.913; JSCS–4488; doi: 10.2298/JSC130113021Z; Short communication

 

SHORT COMMUNICATION

Palladium(II) complexes with R₂edda derived ligands. Part VI. O,O¢-Diisopropyl ester of N,N¢-1,2-ethanediylbis-L-leucine, dihydrochloride dihydrate and its palladium(II) complex: synthesis and characterization

BOJANA B. ZMEJKOVSKI, TIBOR J. SABO* and GORAN N. KALUĐEROVIĆ**

Department of Chemistry, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia

*Faculty of Chemistry, University of Belgrade, P. O. Box 158, 11001 Belgrade, Serbia

**Institut für Chemie, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Straße 2, D-06120 Halle, Germany and Faculty of Pharmacy, European University, Trg mladenaca 5, 21000 Novi Sad, Serbia

 

(Received 23 January, revised 15 February 2013)

A new R2edda-type ester, O,O′-diisopropyl ester of N,N¢-1,2-ethanediylbis-L-leucine, dihydrochloride dihydrate, [(S,S)-H2iPr2eddl]Cl2·2H2O, 1, and its palladium(II) complex, dichlorido(O,O′-diisopropyl-N,N¢-1,2-ethanediylbis-L-leucinate)palladium(II) hemihydrate, [PdCl2{(S,S)-iPr2eddl}]·0.5H2O, 2, were synthesized and characterized by elemental analysis, and IR and NMR spectroscopy. As expected, the palladium(II) complex was found in two from three possible diastereoisomeric forms (R,R), (S,S) and (R,S) ≡ (S,R).

 

Keywords: palladium complexes; R2edda-type ligands; diastereoisomers.

Full Article - PDF  236 KB               Available OnLine: 15. 02. 2013.        Cited by

J. Serb. Chem. Soc. 78 (8) 1177–1188 (2013)

UDC 547.431.4+66.094.3:544.4+541.124:544.452; JSCS–4489; doi: 10.2298/JSC121122023W; Original scientific paper

 

A criterion based on computational singular perturbation for the construction of a reduced mechanism for dimethyl ether oxidation

ZUOZHU WU, XINQI QIAO AND ZHEN HUANG

Key Laboratory of Power Machinery and Engineering, Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China

 

(Received 22 November 2012, revised 9 February 2013)

A criterion based on the computational singular perturbation (CSP) method is proposed in order to determine the number of quasi-steady state (QSS) species. This criterion is employed for the reduction of a detailed chemical kinetics mechanism for the oxidation of dimethyl ether (DME), involving 55 species and 290 reactions, leading to a 20-step reduced mechanism that involves 26 species. A software package, nAMed I-CSP, was developed to make the reduction process algorithmic. The input to the I-CSP includes: a) the detailed mechanism, b) the numerical solution of the problem for a specific set of operating conditions and c) the number of quasi steady state (QSS) species. The resulting reduced mechanism was validated both in homogenous reactor, including auto-ignition and a perfectly stirred reaction (PSR), over a wide range of pressures and equivalence ratios, and in a one-dimensional, unstretched, premixed, lAMinar steady DME/air flAMe. Comparison of the results calculated with the detailed and the reduced mechanisms shows excellent agreement in the case of a homogenous reactor, but discrepancies could be observed in the case of a premixed lAMinar flAMe.

 

Keyword: I-CSP; auto-ignition; perfectly stirred reaction; premixed flAMe; ignition delay; combustion.

Full Article - PDF  292 KB               Available OnLine: 20. 02. 2013.        Cited by

J. Serb. Chem. Soc. 78 (8) 1189–1202 (2013)

UDC 547.291:541.138.2:544.478:544.6.076–32–546.92’87; JSCS–4490; doi:10.2298/JSC121012138L; Original scientific paper

 

Electrocatalytic properties of Pt–Bi electrodes towards the electro-oxidation of formic acid

JELENA D. LOVIĆ, DUŠAN V. TRIPKOVIĆ, KSENIJA Đ. POPOVIĆ, VLADISLAVA M. JOVANOVIĆ AND AMALIJA V. TRIPKOVIĆ

ICTM – Institute of Electrochemistry, University of Belgrade, Njegoševa 12, P. O. Box 473, 11000 Belgrade, Serbia

 

(Received 12 October, revised 16 November 2012)

Formic acid oxidation was studied on two Pt–Bi catalysts, i.e., Pt2Bi and polycrystalline Pt modified by irreversible adsorbed Bi (Pt/Biirr) in order to establish the difference between the effects of Biirr and Bi in the alloyed state. The results were compared to pure Pt. It was found that both bimetallic catalysts were more active than Pt with the onset potentials shifted to more negative values and the currents at 0.0 V vs. saturated calomel electrode (under steady state conditions) improved by up to two order of magnitude. The origin of the high activity and stability of Pt2Bi was increased selectivity toward formic acid dehydrogenation caused by the ensemble and electronic effects and suppression of Bi leaching from the surface during formic acid oxidation. However, although Pt/Biirr also showed remarkable initial activity compared to pure Pt, dissolution of Bi was not suppressed and poisoning of the electrode surface induced by the dehydration path was observed. Comparison of the initial quasi-steady state and potentiodynAMic results obtained for these two Pt–Bi catalysts revealed that the electronic effect, existing only in the alloy, contributed to the earlier start of the reaction, while the maximum current density was determined by the ensemble effect.

 

Keywords: formic acid; electrochemical oxidation; Pt2Bi catalyst; Pt/Biirr catalyst; fuel cell.

Full Article - PDF  489 KB               Available OnLine: 07. 12. 2012.        Cited by

J. Serb. Chem. Soc. 78 (8) 1203–1212 (2013)

UDC 54–32+53.085.4:544.6.076.32–546.11’98:543.554; JSCS–4491; doi: 10.2298/JSC120927018J; Original scientific paper

 

The application of hydrogen–palladium electrode for potentiometric acid–base determinations in tetrahydrofuran

ANJA B. JOKIĆ, RADMILA M. DŽUDOVIĆ*, LJILJANA N. JAKŠIĆ** and SNEŽANA D. NIKOLIĆ-MANDIĆ***

Faculty of Science, Kosovska Mitrovica, University of Priština, Lole Ribara 29, Kosovska Mitrovica, Serbia

*Faculty of Science, University of Kragujevac, R. Domanovića 12, Kragujevac, Serbia

**University of Belgrade, Faculty of Mining and Geology, Đušina 7, Belgrade, Serbia

***University of Belgrade, Faculty of Chemistry,Studentski trg 16, Belgrade, Serbia

 

(Received 27 September 2012, revised 9 February 2013)

The application of the hydrogen–palladium electrode (H2/Pd) as an indicator electrode for the determination of the relative acidity scale (Es, mV) of tetrahydrofuran (THF) and potentiometric titrations of acids in this solvent were investigated. The relative acidity scale of THF was determined from the difference between the half-neutralization potentials of perchloric acid and tetrabutylAMmonium hydroxide (TBAH), which were measured using both H2/Pd–SCE and glass–SCE electrode pairs. The experimentally obtained value of the Es scale of THF with the H2/Pd–SCE electrode pair was 1155 mV, while that obtained with the glass–SCE electrode pair was 880 mV. By using an H2/Pd indicator electrode, the individual acids (benzoic acid, palmitic acid, maleic acid, acetyl acetone and α-naphthol) and two component acid mixtures (benzoic acid + α-naphthol, palmitic acid + α-naphthol, maleic acid + α-naphthol and maleic acid + phthalic acid) were titrated with a standard solution of TBAH. In addition, sodium methylate and potassium hydroxide proved to be very suitable titrating agents for the titrations of the individual acids and the acids in mixtures, respectively. The relative error of the determination of acids in the mixtures was less than 3 %. The results are in agreement with those obtained using a conventional glass electrode. The advantages of the H2/Pd electrode over a glass electrode in the potentiometric acid–base determinations in THF lie in the following: this electrode gives a wider relative acidity scale for THF, larger potential jumps at the titration end-point and relatively fast response times. Furthermore, it is very durable, simple to prepare and can be used in the titrations of small volumes.

 

Keywords: relative acidity scale; hydrogen–palladium electrode; potentiometry; acid mixtures; tetrahydrofuran.

Full Article - PDF  243 KB               Available OnLine: 11. 02. 2013.        Cited by

J. Serb. Chem. Soc. 78 (8) 1213–1223 (2013)

UDC 678.84–261+62–405.8:546.261.000.57+536.421.5:539.24; JSCS–4492; doi: 10.2298/JSC121201014L; Original scientific paper

 

Conversion of a wood flour–SiO₂–phenolic composite to a porous SiC cerAMic containing SiC whiskers

ZHONG LI, TIEJUN SHI* and DEXIN TAN

School of Chemical Engineering, Anhui University of Science &AMp; Technology, Huainan 232001, China

*School of Chemical Engineering, Hefei University of Technology, Hefei 230009, China

 

(Received 1 December 2012, revised 5 February 2013)

A novel wood flour–SiO2–phenolic composite was chosen for conversion into a porous SiC cerAMic containing SiC whiskers via carbothermal reduction. At 1550 °C, the composite was converted into porous a SiC cerAMic, with pore diAMeters of 10–40 μm, consisting of β-SiC located at the position of former wood cell walls. β-SiC wire-like whiskers of less than 50 nm in diAMeter and several tens to over 100 μm in length form within the pores. The surface of the resulting cerAMic was coated with β-SiC necklace-like whiskers with diAMeters of 1–2 μm.

 

Keywords: porous silicon carbide; biocarbon; sintering; microstructure.

Full Article - PDF  1,133 KB           Available OnLine: 01. 04. 2013.        Cited by

J. Serb. Chem. Soc. 78 (8) 1225–1240 (2013)

UDC 633.71–32+54–145.2+547.288.1+546.11’226:541.25; JSCS–4493; doi: 10.2298/JSC111212027S; Original scientific paper

 

Solution thermodynAMics of aqueous nicotinic acid solutions in the presence of tetrabutylAMmonium hydrogen sulphate

ABHIJIT SARKAR and BISWAJIT SINHA

Department of Chemistry, University of North Bengal, Darjeeling-734013, India

 

(Received 12 December 2012, revised 27 February 2013)

In this study, we investigated the effects of tetrabutylAMmonium hydrogen sulphate (Bu4NHSO4) on the solute–solute and solute–solvent interactions in the aqueous solutions of nicotinic acid in terms of the apparent molar volumes (φV), standard partial molar volumes () and viscosity B-coefficients at 298.15, 308.15 and 318.15 K under AMbient pressure. These interactions are further discussed in terms of ion–dipolar, hydrophobic–hydrophobic, hydrophilic–hydrophobic group interactions. The activation parAMeters of viscous flow for Bu4NHSO4 in the aqueous solutions of nicotinic acid are discussed in terms of the transition state theory. The overall results indicated that ion–hydrophilic and hydrophilic–hydrophilic group interactions are predominant in aqueous solutions of nicotinic acid and that Bu4NHSO4 has a dehydration effect on hydrated nicotinic acid.

 

Keywords: Partial molar volumes; viscosity B-coefficients; tetrabutylAMmonium hydrogen sulphate; nicotinic acid.

Full Article - PDF  299 KB               Supplementary Material PDF  139 KB          Available OnLine: 27. 02. 2013.        Cited by

J. Serb. Chem. Soc. 78 (8) 1241–1258 (2013)

UDC *Phragmites australis+546.47/.49’56’815:627.81.000.57:581.9(497.16); JSCS–4494; doi: 10.2298/JSC121026153K; Original scientific paper

 

Seasonal changes in metal accumulation and distribution in the organs of Phragmites australis (common reed) from Lake Skadar, Montenegro

VLATKO KASTRATOVIĆ, SLAĐANA KRIVOKAPIĆ, DIJANA ĐUROVIĆ* and NADA BLAGOJEVIĆ**

Faculty of Natural Sciences and Mathematics, University of Montenegro, G. Washington Street, P. O. Box 5455, 81000 Podgorica, Montenegro

*Institute of Public Health of Montenegro, Ljubljanska bb, 81000 Podgorica, Montenegro

**Faculty of Metallurgy and Technology, University of Montenegro, G. Washington Street, P. O. Box 5455, 81000 Podgorica, Montenegro

 

(Received 16 October, revised 8 December 2012)

Due to its ability to accumulate metals, availability throughout the year and large biomass, Phragmites australis (common reed) is suitable for biomonitoring studies for the evaluation of load levels of trace metals in aqueous ecosystems. The heavy metals concentration in P. australis tissue can be several ten to several thousand times higher than those in the surrounding water. In this study, the content of heavy metals (Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn, Sr and V) in sediment, water and different organs of Phragmites australis collected from Lake Skadar, Montenegro, during different seasons of the year 2011, were exAMined. The highest concentrations of Sr were found in the leaves, while the other studied metals showed their highest concentrations in the roots. Thus, P. australis is considered a root bioaccumulation species. For most metals, the concentrations in the roots and stems increased over time until the end of the growing season and then decreased, while the concentrations in the leaves increased even after the growing season of the plant. If P. australis is used for phytoremediation purposes, then it should be harvested after the growing season because then the concentrations of metals in the above-ground parts are maximal.

 

Keywords: phragmites australis; heavy metals; Lake Skadar; bioaccumulation; phytoremediation.

Full Article - PDF  414 KB               Available OnLine: 24. 12. 2012.        Cited by

J. Serb. Chem. Soc. 78 (8) 1259–1268 (2013)

UDC 639.64+581.463+556.56:631.413.3+504.53; JSCS–4495; doi: 10.2298/JSC121102159M; Original scientific paper

 

Halophytes relations to soil ionic composition

DUBRAVKA MILIĆ, JADRANKA LUKOVIĆ, LANA ZORIĆ, JOVICA VASIN*, JORDANA NINKOV*, TIJANA ZEREMSKI* and STANKO MILIĆ*

Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia

*Institute of Field and Vegetable Crops, Novi Sad, Serbia

 

(Received 2 November, revised 27 December 2012)

The concentration of Na+, K+, Ca2+ and Mg2+ in the root and above-ground organs of three halophyte species (Salicornia europaea, Suaeda maritima and Salsola soda) as well as in the soil where they grew from maritime and inland saline areas were investigated. The aim of the research was to evaluate the capability of some halophyte species to absorb different cations and to find if a differentiation of salt accumulation between the populations from inland and maritime saline areas exists. In five analyzed localities (Tivatska solila, Ulcinj salina, Slano Kopovo, Melenci and Okanj), the external Na+ concentrations exceeded those of the other investigated cations. The investigated halophytes accumulated more Na+ than Mg2+, Ca2+ and K+ and more cations were recorded in the above-ground organs than in the root. The populations from maritime saline areas generally had higher cation concentrations than plants from inland saline areas.

 

Keywords: salt accumulation; Salicornia europaea; Suaeda maritima; Salsola soda.

Full Article - PDF  358 KB               Available OnLine: 05. 03. 2013.        Cited by

Society Home Page

Journal Home Page

 

Copyright &AMp; copy; SHD 2013.
Aug 22. 2013.
For more information contact: JSCS-info@shd.org.rs