The concentrations of heavy metals (Cu, Zn, Cr, Pb, Cd and As) were measured in sea water and mussels at location in the Boka Kotor Bay which selected as result of increased anthropogenic impacts from land. Sampling was performed at three locations, Sv. Stasije, Herceg Novi and Žanjice in the fall 2006 and spring 2007. The majority of the microelements registered in higher concentrations in fall samples in 2006 than in spring samples 2007. The concentration of metals in the studied samples was present at different levels, and is beloved the maximum level allowed, except for yinc and lead in some locations.

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.

The microbiological quality of the groundwater was monitored by determining relevant physiological groups of bacteria (organotrophic bacteria) which are indicators of water organic pollution. Standard high nutritive medium (Nutrient Agar) and low nutritive medium (R2A agar) were used. The enzymatic activity was also estimated based on IFA determination (index of phosphatase activity). According to the number of organotrophic bacteria and categorization by Kohl (Kohl, 1975) water is generally classified in category II. IFA showed variation of water quality, which varied from polluted to very pollute. The results showed organic pollution of groundwater and confirmed the sensitivity of enzymatic methods. In addition, cultivation methods confirmed superiority of low nutritive media.

Complex hydrodynamics and thermal regimes of temperate lakes have a major impact on temporal and spatial distributions of water quality indices. Transport processes in lakes are driven primarily by external forces such as wind and solar radiation but also depend on the inflow and outflow regimes. This paper presents a simplified ID model developed to calculate seasonal variations in vertical distributions of temperature and dissolved oxygen in Lake Zavoj in southern Serbia. Model results that were based on monthly averaged meteorological data are in good agreement with measured vertical profiles of temperature and dissolved oxygen. The simplified model is an efficient tool for long-term prediction of water quality indices in deep, medium and long residence time lakes.

In order to determine the stable isotope content of hydrogen (2H/1H) and oxygen (18O/16O) from surface water and the Zavoj Lake, a sampling campaign was carried out in November 2011. Vertical profiles of water samples were collected in the sections close to the dam to check whether there was any detectable influence from the inflowing Visočica River and wheter there was a vertical isotopic stratification of the lake water. Temperature gradient of up to 5.5 deg C between surface and about 60 m depth is observed. Dominant process of mixing the inflowing Visočica River and water leaking from diversion tunnel appear close to the dam.

Desorption kinetics of chosen organochlorine compounds (pentachlorobenzene, lindane and pentachloroaniline) mediated by solid absorbent, XAD-4 macroporous ion-exchange resin, was studied for two different contact times of organic compounds and sediment (15 and 90 days) in order to determine the potentiality of using this sample and fast method for the assessment of (bio)availability of organic pollutants in sediment-water system.

This paper provides an assessment of the Mlava River on the Danube River sediment quality. The contents of Zn, Cu, Pb, Cr, Ni, Cd and As were detected in the surface sediment. Based on the obtained concentrations of these seven metals sediment quality pollution category was determined with respect to PLI (pollution load index) and I geo (geo-accumulation index). It is found that M4 site, according to PLI and I geo (As and Cd) values can be classified as very highly polluted.

The aim of this study was to analyze nine heavy and trace elements (Zn, Fe, Al, As, Cu, Sr, B, Cd and Ba) of the three tissues (muscle, liver and gills) in sterlet (Acipenser ruthenus), black sea shad (Alosa immaculata) and barbel (Barbus barbus). All three species were sampled on the Danube (1173, 1319 and 863 rkm) in Serbia. The obtained concentations of heavy metals and trace elements were used for obtaining an overview of the presence of the abovementioned elements in a descending order and calculate the value of MPI (Pollution Metal index), which represents the total quantity of heavy metals and trace elements per tissue and species. In all the analyzed specimens iron (Fe) and zinc (Zn) were dominant, followed by strontium (Sr) and aluminum (Al), and the other trace elements and heavy metals. The least represented metals were barium (Ba) and cadmium (Cd). MPI values were the highest in liver, followed by gills and muscle of all species; with the exception of barbel, which had extremely high MPI values in the gills.

Constant and highly productive agricultural productivity in the last decades has a tightly connected to irrigation. It is necessary to monitor the irrigation water quality in order to prevent or mitigate negative consequences on yield, soil and irrigation equipment. Besides the major waterways, the detailed canal network has great potential as a water resource. Peculiarities of this kind of water resources require monitoring of water suitability. During a three-year period of research, water was sampled on some localities in Backa and Banat (Serbia). The results of the research indicate that the water quality does not meet the demands proposed by the classifications. This proves the fact that during the irrigation period, it is necessary to monitor the irrigation water quality.

Serbia has a large number of various and for the application convenient mineral and spring waters for using. It is wide base that makes possible to develop practically everything that is abroad known for the application and perspectively possible. Serbia has well developed bottle industry of high quality mineral waters. Present and future seek, and Serbia has great chances to develop a new program production the world highest quality oligomineral waters, with the exclusive chemical composition, ecological safety and origin, suitable for everyday use drink and making food. In that aspect have been finished first completely new experiments and obtained the world significant first results, that are promising new program of production food naturally enriched with essential microelements in the most suitable chemical form for physiology of nutrition. The main aim in research theory and particularly practical application of marketing concept in increment sale of the mineral waters, is to analyze them in details and to use them as the basis for the suggestion of the appropriate measures and activities to help the manufacturer of the mineral waters, to incorporate the marketing concept as the way of business organizational and business strategy.