Determination of partition coefficients of metals in the Sava River environment

1990 ◽  
Vol 140 (2) ◽  
pp. 341-348 ◽  
Author(s):  
N. Drndarski ◽  
D. Stojić ◽  
M. Župančić ◽  
S. Čupić
Keyword(s):  
Partition Coefficients ◽  
Sava River ◽  
The Sava River

scholarly journals Determination of Cd, Pb and As in sediments of the Sava river by electrothermal atomic absorption spectrometry

2010 ◽  
Vol 75 (1) ◽  
pp. 113-128 ◽  
Author(s):  
Simona Murko ◽  
Radmila Milacic ◽  
Marjan Veber ◽  
Janez Scancar
Keyword(s):  
Nitric Acid ◽  
Analytical Procedure ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Magnesium Nitrate ◽  
Matrix Modifier ◽  
Reliable Determination ◽  
Sava River ◽  
The Sava River

The applicability of nitric acid, palladium nitrate and a mixture of palladium and magnesium nitrate as matrix modifiers was estimated for the accurate and reproducible determination of cadmium (Cd), lead (Pb) and arsenic (As) in sediments of the Sava River by electrothermal atomic absorption spectrometry, ETAAS. Decomposition of the samples was done in a closed vessel microwave-assisted digestion system using nitric, hydrochloric and hydrofluoric acids, followed by the addition of boric acid to convert the fluorides into soluble complexes. The parameters for the determination of Cd, Pb and As in sediments were optimized for each individual element and for each matrix modifier. In addition, two sediment reference materials were also analyzed. In determination of Cd and Pb, nitric acid was found to be the most appropriate matrix modifier. The accurate and reliable determination of Cd and Pb in sediments was possible also in the presence of boric acid. The use of a mixture of palladium and magnesium nitrate efficiently compensated for matrix effects and enabled the accurate and reliable determination of As in the sediments. Quantification of Cd and As was performed by calibration using acid matched standard solutions, while the standard addition method was applied for the quantification of Pb. The repeatability of the analytical procedure for the determination of Cd, Pb and As in sediments was ?5 % for Cd, ?4 % for Pb and ?2 % for As. The LOD values of the analytical procedure were found to be 0.05 mg/kg for Cd and 0.25 mg/kg for Pb and As, while the LOQ values were 0.16 mg/kg for Cd and 0.83 mg/kg for Pb and As. Finally, Cd, Pb and As were successfully determined in sediments of the Sava River in Slovenia.

scholarly journals Determination of the sources of nitrate and the microbiological sources of pollution in the Sava River Basin

2016 ◽  
Vol 573 ◽  
pp. 1460-1471 ◽  
Author(s):  
Janja Vrzel ◽  
Branka Vuković-Gačić ◽  
Stoimir Kolarević ◽  
Zoran Gačić ◽  
Margareta Kračun-Kolarević ◽  
...  
Keyword(s):  
River Basin ◽  
Sources Of Pollution ◽  
Sava River ◽  
The Sava River

scholarly journals Rijeka Sava kao resurs u prostornom planiranju

Geoadria ◽  
2017 ◽  
Vol 13 (1) ◽  
pp. 81 ◽  
Author(s):  
Marijan Jukić
Keyword(s):  
Spatial Planning ◽  
Planning Process ◽  
Rational Utilization ◽  
Economic Determinants ◽  
National Importance ◽  
Sava River ◽  
Management And Development ◽  
Spatial Plan ◽  
The Sava River

From the spatial planning aspect the river Sava is the meeting area of numerous spatial, natural and economic determinants. Appropriate and purposeful planning has an inestimable importance due to the fact that it is the only way for the rational utilization of the river basin. It should be emphasized that rational utilization also includes the overall protection of mentioned area. Special attention should be dedicated to the problem of defining spatial plan borders, because of the specific characteristics of the area. Namely,current spatial plans of the river Sava basin are outlined in a way that Sava river is their border instead of their skeleton. That approach, induced by cross-border issues between the neighbouring countries, especially Croatia and Bosnia and Herzegovina, disables the rational utilization, development and protection of the area. The preconditions of purposefully planning process of the Sava river are evaluation and determination of the common utilization of criteria and elements of the area. The latter refers to political circumstances since the river Sava flowsthroughseveral neighbouring countries. Consequently, it is a question of a spatial planning which, in case of the Sava river, has above-national importance because every faulty step jeopardizes balanced and sustainable development of a wide area. Taking into consideration the whole complexity of above mentioned, the main aim of this paper is to give contribution to the understanding of the spatial planning process in the way that planning, by itself, results in the sustainable management and development of the Sava river area.

scholarly journals COENOLOGICAL SIMILARITIES OF DIATOMS IN WELLS AND IN OTHER WATER BIOTOPES IN BOSNIA AND HERZEGOVINA

2018 ◽  
Vol 1 (18) ◽  
Author(s):  
Milenko Ćurčić ◽  
Dragica Milinković ◽  
Olivera Petrović-Tomanić ◽  
Dijana Đurić
Keyword(s):  
Comparative Analysis ◽  
Bosnia And Herzegovina ◽  
Qualitative Data ◽  
Anthropogenic Activity ◽  
Seasonal Fluctuations ◽  
Sava River ◽  
Infraspecific Taxa ◽  
Artesian Wells ◽  
The Sava River

The research and determination of diatoms (Bacillariophyta) have been carried out in the area ofSemberija (Bosnia and Herzegovina) in several locations, which included 35 open shadoof wellsincurred by the anthropogenic activity many decades ago, and they represent artificial fresh waterecosystems. The algological material has been collected from wells in 9 villages, the Sava River, at thesite Bosanska Rača, the Drenovača pond in Velino Selo, artesian wells in Velino Selo and DonjiBrodac, and ephemeral puddles in the immediate proximity of the researched wells. In all investigatedhabitats of those locations 149 species and infraspecific taxa of Bacillariophyta in total have beenidentified, of which 89 (59.73%) were identified only in the investigated wells in Semberija.On the basis of comparative analysis results, it can be concluded that 45 (30.20%) of species andinfraspecific taxa of Bacillariophyta are common for the wells and other investigated localities (SavaRiver, Drenovača pond, artesian wells, ephemeral puddles). 61 species and infraspecific taxa ofBacillariophyta (40.93%) were identified in Sava River, 57 species and infraspecific taxa (38.25%) inDrenovača pond, 21 species in front of the artesian wells and 16 species and infraspecific taxa in theephemeral puddles. The density of population, i.e. the production of Bacillariophyta in the investigatedwells, shows similar seasonal fluctuations. The highest average number of plants per unit of area on themoss leaves at a depth of 50 cm of well walls amounted to 453702 items/cm2, and the lowest averagenumber of plants was recorded at the depth of 200 cm of well walls and amounted to 68.207 items/cm2.In order to have the objective results of the researched and identified diatoms in the mentioned biotopes,the numerical analysis of qualitative data on the structure of diatoms in similar biotopes, i.e. on theircoenological similarities, have been carried out.

Interphase distribution of 2-furylethylenes

1985 ◽  
Vol 50 (8) ◽  
pp. 1642-1647 ◽  
Author(s):  
Štefan Baláž ◽  
Anton Kuchár ◽  
Ernest Šturdík ◽  
Michal Rosenberg ◽  
Ladislav Štibrányi ◽  
...  
Keyword(s):  
Partition Coefficient ◽  
Partition Coefficients ◽  
Transport Rate ◽  
Phase System ◽  
Two Phase ◽  
Interphase Distribution ◽  
Distribution Kinetics ◽  
System 1 ◽  
Kinetics Of

The distribution kinetics of 35 2-furylethylene derivatives in two-phase system 1-octanol-water was investigated. The transport rate parameters in direction water-1-octanol (l1) and backwards (l2) are partition coefficient P = l1/l2 dependent according to equations l1 = logP - log(βP + 1) + const., l2 = -log(βP + 1) + const., const. = -5.600, β = 0.261. Importance of this finding for assesment of distribution of compounds under investigation in biosystems and also the suitability of the presented method for determination of partition coefficients are discussed.

scholarly journals Evidence for two asymmetric conformational states in the human erythrocyte sugar-transport system

1975 ◽  
Vol 145 (3) ◽  
pp. 417-429 ◽  
Author(s):  
J E Barnett ◽  
G D Holman ◽  
R A Chalkley ◽  
K A Munday
Keyword(s):  
Glucose Transport ◽  
Transport System ◽  
Human Erythrocyte ◽  
Partition Coefficients ◽  
External Medium ◽  
Sugar Transport ◽  
Conformational States ◽  
Glucose Transport System ◽  
Oil Water

6-O-methyl-, 6-O-propyl-, 6-O-pentyl- and 6-O-benzyl-D-galactose, and 6-O-methyl-, 6-O-propyl- and 6-O-pentyl-D-glucose inhibit the glucose-transport system of the human erythrocyte when added to the external medium. Penetration of 6-O-methyl-D-galactose is inhibited by D-glucose, suggesting that it is transported by the glucose-transport system, but the longer-chain 6-O-alkyl-D-galactoses penetrate by a slower D-glucose-insensitive route at rates proportional to their olive oil/water partition coefficients. 6-O-n-Propyl-D-glucose and 6-O-n-propyl-D-galactose do not significantly inhibit L-sorbose entry or D-glucose exit when present only on the inside of the cells whereas propyl-beta-D-glucopyranoside, which also penetrates the membrane slowly by a glucose-insensitive route, only inhibits L-sorbose entry or D-glucose exit when present inside the cells, and not when on the outside. The 6-O-alkyl-D-galactoses, like the other nontransported C-4 and C-6 derivatives, maltose and 4,6-O-ethylidene-D-glucose, protect against fluorodinitrobenzene inactivation, whereas propyl beta-D-glucopyranoside stimulates the inactivation. Of the transported sugars tested, those modified at C-1, C-2 and C-3 enhance fluorodinitrobenzene inactivation, where those modified at C-4 and C-6 do not, but are inert or protect against inactivation. An asymmetric mechanism is proposed with two conformational states in which the sugar binds to the transport system so that C-4 and C-6 are in contact with the solvent on the outside and C-1 is in contact with the solvent on the inside of the cell. It is suggested that fluorodinitrobenzene reacts with the form of the transport system that binds sugars at the inner side of the membrane. An Appendix describes the theoretical basis of the experimental methods used for the determination of kinetic constants for non-permeating inhibitors.

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