In the 21 century drinking water of acceptable quality should be available to every person. Numerous investigations are on-going worldwide around the world, to develop innovative and cost attractive approaches for production of high quality drinking water. To allow application of new treatment technology in practice, pilot testing under field conditions are required. Groundwater used for drinking water productions in the Subotica municipalities (Serbia) contains elevated concentrations of arsenic, iron and ammonia, and therefore provided a good basis for continuation of research of UNESCO-IHE, the Netherlands Institute for Water Education, that has been developing innovative water treatment technologies specifically in the field of groundwater treatment and specifically arsenic removal. Objective of this project presented in this paper were to test under field conditions IHE ADART, the innovative adsorptive arsenic removal technology. The pilot project has demonstrated that in addition to conventional approach based on coagulation and break-point chlorination, there is and alternative treatment approach based on biological ammonia removal and adsorptive removal of arsenic that could be economically and ecologically attractive.

This study investigates the effect of low molecular weight carboxylic acid on degradation of textile dye C.I. Reactive Orange 16 (RO16), in function of initial pH, using Ultra Violet light and H2O2. Experiments were performed in photoreactor with UVC lamps in stationary conditions. Results shows that carboxylic acids have inhibitory effect on degradation process of dye. With increasing concentration of dye inhibitory effect grows. Inhibitory effect of acid are higher on pH values of solution higher than pKa acids, because than in solution acids appear almost entirely in the form of anion. The highest inhibitory effect shows formates, smaller propanoates, and the smallest acetates. UV/H2O2 process is very effective for removal of organic pollutants, but the efficiency of this process was significantly lower in the presence of lower carboxylic acids.

In the case that water quality data or even discharge data are missing, pollution loads were calculated as application of appropriate simulation models of pollution transport. Models can be in different levels complexity. Accuracy of the results depends on the accuracy of measurement data. In this study water quality of River Neretva (prediction of BOD pollution loads) is modeled in section from Mostar to Žitomislić using numerical model MIKE 11. Model is calibrated on the basis of available experimental data. Data of another time series are used for verification of last mentioned. The comparative analysis between measured and simulated data showed that MIKE-11 is able to predict sufficiently accurate BOD and DO loads at the catchment outlet.

The content of major elements Al, K and Mg was investigated in surface sediment samples from the coastal area of the South-eastern Adriatic, in sediment fraction less than 2 mm. Obtained results were used to present horizontal spatial distribution of these elements in sediment of the area studied. The spatial distribution of elements showed similarities in the behavior of Al and K, while the distribution pattern of Mg in sediment was contrary to Al and K. It can be noticed that the sediment composition in terms of these elements reflects the geological characteristics of the continental hinterland in the South-eastern Adriatic coastal zone.

The fact is that in the world today water and land represents limited life resources which are more and more degrade and disturbed, mostly by anthropogenic influence. Especially water (seas, rivers, lakes) is exposed to various types of pollution. The fact is that in the world today water and land represented limited life resources which are more. That why in present time we conduct numerous scientific researches to examine, advance and protect our environment, especially water as a limited and delicate natural resource. In this work results from April to September 2011 are presented, which comprised analyses of samples from 8 stations in Boka Kotorska Bay. The main aim was to estimate trophic level, of determining the concentration of the physico-chemical parameters, chlorophyll a and TRIX index in Boka Kotorska Bay.

During the continuous analysis of zooplankton and hydrographic quality of sea in Boka Kotorska bay in season series during 2007/08, in addition to the other zooplanktons groups, fauna was analyzed, the appearance and abundance of Siphonophorae. Special attention was applied to biodiversity, dynamic abundance and distribution of group. In this paper we are exposing the data for abundance and distribution of group of Siphonophorae from Boka Kotorska Bay. We have found six species of which only the species Muggiaea cochi (W and l l) can be located throughout the year at all stations and in shallow stations only in summer. The other species Lensia conoidea (Keferstein et Ehlers), Lensia multicristata (Moser), Lensia subtilis (Chun), Lensia fowleri (Bigelow), Abylopsis tetragona (Otto) occur rarely in small numbers or in individual specimens.

This paper presents results of measuring the contents of certain bioindicators in samples of digestive gland and lung of mussels (Mytilus galloprovincialis). The results were obtained in the framework of the Program for monitoring ecological status in Montenegro from 2009 to 2011 year. Samples were collected from two locations: Kotor-Dobrota (wild mussels) and the site of Bijela (caged mussels). Dynamic of sampling was twice a year, in April and September. In order to estimate the spatial distribution and temporal trends of pollution the results were compared with analysis of biomarkers in the three localities in the Slovenian coastal waters (bays Piran, Koper and Strujan). Biomarker responses showed no differences between these positions in the southern and northern Adriatic.

The paper presents the results of different methods of sequential extraction of metal in sediment of the Great Backa canal in order to obtain data on the total, available and potentially available contents of heavy metals as well as risk assessment in aquatic systems. Based on the results of sequential extraction of metals was found that sediment does not have the risk to the environment in terms of Cr, Cu and Pb concentration while the contents of Ni, Zn and Cd sediment indicates a moderate risk. Results of sequantial extraction of metals indicate that the risk to the aquatic ecosystems decreases in risk assessment based on the pseudo total metal content in the sediment. Thus the results suggest that not all detected metals are bioavailable and that not only on the basis of total metal content of the actual risk may be overestimated.