Development of innovative optic sensor technology for chemical analysis of inorganic pollutants in aquatic medium

Osnovni cilj teze bio je razvoj nove i inovativne senzorske metode za merenje neorganskih parametara u površinskim vodama i vodama zatvorenih bazena. Kolorimetriski fiber-optički senzor (KFOS) je osposobljen za merenje pet parametara u površinskoj vodi (ortofosfata, ukupnog hlora, hroma (VI), nitrita i sulfata) i za merenje dva parametra u bazenskim vodama (rezidualnog hlora i ukupnog hlora). Pored prilagođavanja nove metode urađena je i analiza kvaliteta reke Dunav u Novom Sadu na osnovu čega su odabrani parametri za merenje sa KFOS metodom.The main goal of the thesis was to develop a new and innovative sensor method for measuring inorganic parameters in surface waters and waters of indoor pools. The Colorimetric Fiber Optic Sensor (CFOS) is capable for measuring five parameters in surface water (orthophosphate, total chlorine, chromium (VI), nitrite and sulfate) and for measuring two parameters in pool water (residual chlorine and total chlorine). In addition to adjusting the new method, an analysis of the quality of the Danube River in Novi Sad was performed and based on which parameters for measuring with the KFOS method were selected

Development of innovative optic sensor technology for chemical analysis of inorganic pollutants in aquatic medium

Osnovni cilj teze bio je razvoj nove i inovativne senzorske metode za merenje neorganskih parametara u površinskim vodama i vodama zatvorenih bazena. Kolorimetriski fiber-optički senzor (KFOS) je osposobljen za merenje pet parametara u površinskoj vodi (ortofosfata, ukupnog hlora, hroma (VI), nitrita i sulfata) i za merenje dva parametra u bazenskim vodama (rezidualnog hlora i ukupnog hlora). Pored prilagođavanja nove metode urađena je i analiza kvaliteta reke Dunav u Novom Sadu na osnovu čega su odabrani parametri za merenje sa KFOS metodom.The main goal of the thesis was to develop a new and innovative sensor method for measuring inorganic parameters in surface waters and waters of indoor pools. The Colorimetric Fiber Optic Sensor (CFOS) is capable for measuring five parameters in surface water (orthophosphate, total chlorine, chromium (VI), nitrite and sulfate) and for measuring two parameters in pool water (residual chlorine and total chlorine). In addition to adjusting the new method, an analysis of the quality of the Danube River in Novi Sad was performed and based on which parameters for measuring with the KFOS method were selected

Mapping nitrogen transformation potential in anoxic alluvial aquifer using PCA and CA analysis

Increase in worldwide population has led to increase in food production. Increased food production consequently increased pesticide and fertilizers use. In fertilizers, nitrogen is in form of nitrate, ammonia or amide. Nitrates expressed solubility as well as inability of negatively charged ions to sorb on sediment particles, are usually the reasons why nitrates are considered as the final mobile compound of nitrogen transformation in soil. Information about the final compound of nitrogen resulting from transformation in water is important as an indication of aquifer potential for nitrogen conservation (NH4 ) or loss (N2O, N2). To evaluate the results of groundwater quality monitoring, during four years period, Principal Component Analysis (PCA) and Cluster Analysis (CA) were performed. Displayed map, developed as part of this study, presents an intersection of the conclusions based on two main factors, revealed by PCA analysi. Mapped local potential for nitrogen conservation or loss in the first drainage line of Kovin-Dubovac aquifer could be useful for managing the fate of nitrate entering the anoxic groundwater systems

Determining seasonal correlation among anoxic nitrogen transformation conditions

We examined seasonal change in physicochemical parameters NH4, NO3, Cl, SO4 2- , Fe2+, Mn and TOC for anoxic alluvial groundwater from the first drainage line at Kovin-Dubovac and Danube water level. To evaluate the results of four year monitoring programme Principal Component Analysis (PCA) and Cluster Analysis (CA) were performed. Principal component analysis (PCA) as a multivariate statistical method was used for data filtering in order to indicate if there is a connection between groundwater chemistry, surface water levels and sampling season. NH4, NO3, Fe2+, Mn, SO4 2- and TOC were chosen as important indicators of nitrogen transformation potential. Cl and Danube levels were included in analysis as indicators of groundwater recharge. Cluster analysis (CA) was applied for grouping the months of groundwater sampling with similar pattern

Mobility of selected pesticides in groundwater

The use of pesticides in plant protection products could result in their occurrence in all environmental mediums. Due to the concern about their environmental impact, the presence of pesticides is monitored in air, soil, water, and also in food and tissues. Jaroslav Černi Institute for the Development of Water Resources has conducted surface and groundwater sampling campaigns, in order to monitor fifteen different pesticides from priority and emerging substances lists. This paper is focused on the results of the groundwater sampling, where the most frequently detected pesticides were herbicide atrazine, fungicide carbendazim and insecticide carbofuran. In this paper, the fact that these pesticides were most frequently detected in groundwater was used for further research of their mobility. The most important process that influences the mobility of pesticides in the environment is the sorption. Therefore, sorption process was observed in the terms of linear sorption coefficient. Multiple linear regressions were used to establish the relationship between the linear sorption coefficient of each pesticide and various soil parameters, that have the highest impact on the sorption process. A thorough understanding of pesticides sorption behavior is crucial for predicting the movement rate of the pesticide in the environment. Information based on these processes will help with predicting the fate of pesticides in the groundwater, but also in the surface waters

Monitoring of chlorine by new method based on FOS in water bodies

Fibre optic sensor (FOS) is used to measure the concentration of total chlorine in samples of surface water, swimming pool water and leachate from MSW landfill. FOS represents new original method which is based on the color of the sample for measurement ofanalyteconcentration. Color sensor converts RGB (Red-Green-Blue) color model to HSV (Hue-Saturation-Value) color model. S and V parameters were used for determination of chlorineconcentrations in selected water bodies. H parameter was used for the calculation of wavelength at which applied sensor measures the concentration of total chlorine. Research was carried out to validate the effectiveness and repeatability of the results obtained with FOS and confirms the capability to use sensor in laboratory controlled conditions. Results obtained with FOS are compared with standard analytical methods (UV-Vis spectrophotometer) to confirm the possibility of using FOS as replacement for standard analytical expensive equipment

Evaluation of leachate pollution index of urban municipal landfill site in Novi Sad, Serbia

Leachate samples were collected during the one year monitoring campaign, on municipal solid waste landfill in Novi Sad, Serbia. Determination of T, pH, EC, DO, BOD5, COD, NO2-N, NO3-N, NH4-N, Tot N, Tot P, B, SO4 2-, KMnO4, and cations of metals (Ca, Mg, Na, K, B, Cr, Ni, Zn, Fe, Cd, Pb and Al) was performed in order to evaluate the leachate pollution index (LPI) (Kumar and Alapat 2005). Due to the obtained values, only 7 parameters (pH, total dissolved solids, BOD5, COD, iron, zinc, and lead) were used for the purpose of calculation of LPI, which resulted in the reduced value of total pollution index. The obtained LPI value was 6,87 and was lower than value obtained within the previous study from the similar landfill site in Croatia (8,53) (Matešić et al., 2016). In addition the obtained LPI value is lower than 35 which indicates the low potential of contamination, as well as the relatively constant quality status of the leachate on landfill site in Novi Sad. The future monitoring programs should include all 18 prescribed parameters for LPI evaluation in order to obtain the overall value of the contamination index

Cancer risk assessment of anatomy laboratory workers

Formaldehyde (FA) is a chemical traditionally used in pathology and anatomy laboratories as a tissue preservative. Several epidemiological studies of occupational exposure to FA have indicated an increased risk of various types of cancer in industrial workers, embalmers and pathology anatomists. Based on the available data IARC, the International Agency for Research on Cancer, has recently classified FA as a human carcinogen. This paper presents the results of the quarterly monitoring of concentration levels of formaldehyde in the working premises of the Department of Anatomy at the Medical Faculty. Air monitoring was performed in order to evaluate occupational exposure to FA. The measurements of concentration levels of formaldehyde were conducted at five locations inside the Department in order to assess the exposure level and cancer risk of students and employees of the institution. The level of exposure to FA was evaluated near the breathing zone of workers. The calculations indicate an extremely high level of cancer risk of the employees. The values obtained in all measuring places are significantly higher than those recommended by international expert organizations. When it comes to students, risk levels are in range with those recommended by international organizations

Monitoring of inorganic chemical parameters in river Danube, Novi Sad, Serbia

Because of the importance Danube river has on the region and the population affected by it is essential to maintain constant monitoring. With new emerging pollutants every day and regular threats one of the crucial goals is to investigate the causes of possible contamination with the acquisition of new, until then unknown information. To be able to achieve quality investigation and to acquire new information special monitoring has been conducted, in which quantitative analysis of key physical-chemical parameters in water body was carried out with laboratory methods

Water for all : Proceedings of the 7th international scientific and professional conference Water for all

The 7th International Scientific and Professional Conference Water for all is organized to honour the World Water Day by the Josip Juraj Strossmayer University of Osijek, European Hygienic Engineering & Design Group (EHEDG), Danube Parks, Croatian Food Agency, Croatian Water, Faculty of Food Technology Osijek, Faculty of Agriculture in Osijek, Faculty of Civil Engineering Osijek, Josip Juraj Strossmayer University of Osijek Department of Biology, Josip Juraj Strossmayer University of Osijek Department of Chemistry, Nature Park “Kopački rit”, Osijek- Baranja County, Public Health Institute of the Osijek- Baranja County and „Vodovod-Osijek“ -water supply company in Osijek. The topic of World Water Day 2017 was "Wastewater" emphasizing the importance and influence of wastewater treatments on global environment. The international scientific and professional conference Water for all is a gathering of scientists and experts in the field of water management, including chemists, biologists, civil and agriculture engineers, with a goal to remind people about the significance of fresh water and to promote an interdisciplinary approach and sustainability for fresh water resource management. The Conference has been held since 2011. About 300 scientists and engineers submitted 95 abstracts to the 7th International Scientific and Professional Conference Water for all, out of which 33 was presented orally and 62 as posters. 47 full papers were accepted by the Scientific Committee. 38 full papers became the part of the this Proceedings while 9 papers were accepted for publication in Croatian Journal of Food Science and Technology and Electronic Journal of the Faculty of Civil Engineering Osijek - e-GFOS