Academic literature on the topic 'UV-H2O2 AOP'

Os efluentes corados ainda são um problema em estações de tratamento de esgoto. Os corantes normalmente apresentam estruturas complexas e difíceis de serem degradadas por processos convencionais, entrando no meio ambiente aquático e causando impacto visual, mudanças nas características físico-químicas da água, prejudicam a fotossíntese do meio e podem apresentar efeitos ecotóxicos. Para o tratamento de vários tipos de efluentes, os Processos Oxidativos Avançados (POAs) são eficientes, rápidos e promovem uma oxidação não seletiva. Os POAs podem se tornar mais eficazes com o acoplamento de outras tecnologias, como as micro-ondas. As micro-ondas não possuem energia suficiente para quebrar as ligações intermoleculares, mas quando somadas ao processo UV/H2O2 pode haver um efeito sinérgico melhorando o desempenho do POA. Neste trabalho, buscou-se a otimização do processo UV/H2O2 acoplado às micro-ondas utilizando-se uma lâmpada de descarga sem eletrodo (LDE) de Hg e Fe. Utilizou-se um planejamento experimental para estudar a degradação de uma mistura de três corantes ácidos de classes diferentes: Acid Blue 9 (C.I. 42090, triarilmetano), Acid Red 92 (C.I. 45410, xanteno) e Acid Yellow 23 (C.I. 19140, monoazo). A variável-resposta observada foi a concentração residual dos corantes medida por CLAE. As condições ótimas para o tratamento foram: concentração inicial de peróxido de hidrogênio = 125 mg L-1, pH= 6,2 e vazão = 800 mL min-1. Em 180 min de tratamento, correspondente a 45 min de irradiação alcançou-se uma degradação de 23, 20 e 98% para AB9, AR92 e AY23 respectivamente. O modelo cinético foi de pseudo 1ª ordem para o AY23, com k = (1,7 &#177;0,041) × 10-2 min-1 e R² = 0,990. Não foi possível determinar a cinética de degradação do AB9 e do AR92 por causa da baixa degradação alcançada (aproximadamente uma ordem de grandeza menor). A partir das análises de espectrometria de massas, observou-se um único produto de degradação: o AY23 monohidroxilado. Esse produto não apresentou ecotoxicidade para o organismo-teste L. sativa. No entanto, ele foi tóxico para o organismo D. similis, imobilizando os microcrustáceos em todas as diluições testadas.<br>Colored effluents are still a problem in wastewater treatment plants. Dyes usually have complex structures that are difficult to be degraded by conventional processes, thus entering into the aquatic environment and causing visual impact, changes in the water physicochemical characteristics, impairing photosynthesis, and posing ecotoxic effects. For the treatment of various types of wastewater, the Advanced Oxidation Processes (AOP) are efficient, fast and promote non-selective oxidation. AOPs can become more effective by coupling them to other technologies, such as microwaves. Microwaves do not have enough energy to break intermolecular bonds, but when coupled to the UV/H2O2 process, there may be a synergistic effect improving the AOP performance. In this study, the UV/H2O2 process coupled to microwaves, using an Hg and Fe electrodeless discharge lamp (EDL), was optimized. An experimental design was performed to study the degradation of a mixture of three acid dyes of different classes: Acid Blue 9 (C.I. 42090 , triarylmethane), Acid Red 92 (C.I. 45410, xanthene), and Acid Yellow 23 (C.I. 19140, monoazo). The observed response variable was the residual concentration of the dyes measured by HPLC. The optimum conditions for the treatment were: initial hydrogen peroxide concentration = 125 mg L- 1, pH = 6.2, and flow rate = 800 mL min-1. In 180 min of treatment, corresponding to 45 min of irradiation, it was achieved a degradation of 23, 20, and 98% for AB9, AR92, and AY23 respectively. The AY23 degradation followed a pseudo-first-order kinetic model, with k = (1.7 &#177;0,041) × 10-2 min-1 and R² = 0.990. It was not possible to determine the degradation kinetics of AB9 and AR92 due to the low degradation achieved (approximately one order of magnitude lower). From mass espectrometry analyses, only one degradation product was observed: monohydroxilated AY23. That product showed no ecotoxicity towards the test-organism L. sativa. However, it was toxic towards the test-organism D. similis, immobilizing the microcrustaceans in all tested dilutions.

Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>As atividades industriais que consomem excesso de Ãgua no seu processo industrial, geralmente geram um elevado volume de efluentes, onde a indÃstria tÃxtil à um exemplo tÃpico. A oxidaÃÃo quÃmica à um dos processos alternativos para o tratamento de efluentes contendo corantes tÃxteis, entre eles destacam-se os POAs que sÃo baseados na geraÃÃo de radicais hidroxilas (.OH) no qual sÃo altamente oxidantes, podendo decompor compostos de maneira rÃpida e nÃo-seletiva, conduzindo a mineralizaÃÃo parcial ou completa do contaminante. O presente trabalho estudou o uso de processo oxidativo avanÃado para a degradaÃÃo do corante Remazol Vermelho RB 133%. Os estudos foram realizados em duas etapas. Na primeira etapa, no reator com 710 mL de volume Ãtil, foram realizados estudos de otimizaÃÃo dos parÃmetros: cinÃtica de descoloraÃÃo, dosagem do perÃxido de hidrogÃnio, pH, temperatura, adiÃÃo de perÃxido de hidrogÃnio em linha. A cinÃtica de descoloraÃÃo, e o efeito inibitÃrio de Ãnions tambÃm foram estudados. O estudo de cinÃtica mostrou que em 250 minutos houve uma descoloraÃÃo completa da soluÃÃo usando uma dosagem de perÃxido de hidrogÃnio de 1% H2O2 mediante o uso da radiaÃÃo UV. Nestas condiÃÃes houve uma remoÃÃo de 78,41% na DQO. O pH nÃo influenciou no processo de descoloraÃÃo da soluÃÃo, em contraste, para valores de pH iniciais 8 e 10 houve uma maior remoÃÃo na DQO. O estudo do efeito da temperatura do sistema mostrou que com o aumento temperatura a velocidade de descoloraÃÃo à pouco influenciada, ao passo que o aumento da temperatura (80ÂC) diminuiu a eficiÃncia do processo de remoÃÃo da DQO. A adiÃÃo de H2O2 em linha do processo aumentou a eficiÃncia na remoÃÃo de DQO. Os resultados das eficiÃncias de remoÃÃo ao final do processo indicaram que nÃo houve diferenÃa entre os tratamentos na presenÃa dos Ãnions na concentraÃÃo estudada (10 mM) quando comparada a degradaÃÃo sem a presenÃa desses Ãnions, pois ao final de todos os tratamentos a soluÃÃo ficou incolor. Na segunda etapa, no reator com 520 mL de volume Ãtil, foram realizados estudos de vazÃo e potÃncia de radiaÃÃo UV. O estudo mostrou que para as vazÃes estudadas 1,0; 2,0 e 3,0 L/min nÃo houve uma X diferenÃa significativa no processo de descoloraÃÃo. As concentraÃÃes da matÃria orgÃnica ao final de 480 minutos de experimento para as trÃs vazÃes foram 36,63%; 51,08% e 48,35%, respectivamente. O aumento da potÃncia de radiaÃÃo UV proporcionou um aumento na eficiÃncia do processo de descoloraÃÃo e degradaÃÃo da matÃria orgÃnica. O estudo com efluente real mostrou uma baixa eficiÃncia na reduÃÃo de cor e de demanda quÃmica de oxigÃnio.<br>Industrial processes that consume excess of water, typically generates a high volume of effluent, where the textile industry is a typical example. The oxidation chemistry is one of the alternative processes for the textile dyes treatment. In this context, the Advanced Oxidation Processes (AOPs) are based on the generation of hydroxyl radicals (.OH) on which are highly oxidizing compounds can decompose quickly and non-selective contaminant solutes, for a partial or complete mineralization. This study investigated the use of advanced oxidation process for degradation of the dye Remazol Red RB 133%. The studies were conducted in two stages. For first step, in the reactor with 710 mL of working volume , were studies the parameters: kinetic effect, hydrogen peroxide dosage, temperature, pH, addition of hydrogen peroxide in the line. The kinetics study decolorization and the inhibitory effect of anions were also studied. The study of kinetic showed that in 250 minutes there was a complete decolorization of the solution using a H2O2 dose of 1% (v/v) through the use of UV radiation, and a 78.41% removal in Chemical Oxygen Demand (COD) was observed. The pH effect not influenced in the decolorization process; however has been influenced in removal of COD. The study of temperature effect showed that for an increase in temperature the decolorization rate increases, but a small improvement in the efficiency of COD removal. The addition of H2O2 during the process increased the efficiency of COD removal. The results of the efficiencies of the end of the process indicated that there was no difference between treatments in the presence of anions in the studied concentration (10 mM) when compared to degradation without the presence of these anions, since the end of all treatments, the solution was colorless. In the second stage, was carried in the reactor with 520 mL of working volume flow studies were performed and power of UV radiation. The studies of flow rate showed that for flow rate of 1.0; 2.0 and 3.0 L/min there was no significant difference in the process decolorization process. The of organic matter concentrations at 480 minutes of experiment for the three flow rates were 36.63%, 51.08% and 48.35% respectively. The increased power of UV radiation caused an increase in the XII efficiency of discolouration and degradation of organic matter. The study showed a real effluent with low efficiency to reduce color and chemical oxygen demand.

A presença de antibióticos no ecossistema representa um sério risco à saúde humana e animal em virtude do desenvolvimento crescente de resistência bacteriana. Uma vez que a maioria dos antibióticos é persistente à degradação biológica, os processos oxidativos avançados são apontados como uma das tecnologias mais efetivas para decompor esses compostos em águas residuárias. A bacitracina zíncica (Bc-Zn) é um potente antibiótico constituído por uma mistura complexa de peptídeos não-biodegradáveis, conjugados ao zinco. Apesar de ser um antibiótico amplamente consumido na medicina humana e animal, é preocupante a escassez de estudos que investigam sua degradação e destino ambiental. O presente trabalho analisou a degradação da Bc-Zn através dos processos de fotólise direta e UV/H2O2 em diferentes condições de radiação UVC e concentração inicial de H2O2. Os parâmetros cinéticos rendimento quântico da fotólise, constantes cinéticas de pseudo-primeira ordem e constante cinéticas de segunda ordem foram satisfatoriamente estimados pela modelagem do sistema fotoquímico experimental. Os resultados revelaram que a fotólise direta permitiu degradar todos os congêneres da mistura de Bc-Zn nas maiores doses de radiação UVC empregadas. No entanto, não houve remoção de TOC após 120 minutos de irradiação. A adição de H2O2 acelerou substancialmente a fotodegradação do antibiótico, apresentando constantes cinéticas de pseudo-primeira ordem uma ordem de grandeza superiores às obtidas por fotólise direta. Além disso, remoção considerável de até 71% do TOC foi alcançada. A análise estatística demonstrou que a radiação UV foi um fator bem mais significativo para a fotodegradação da Bc-Zn em relação à concentração inicial de H2O2, sendo as melhores condições do processo alcançadas para a maior taxa específica de emissão de fótons (1,11×10-5 Einstein L-1 s-1). Ensaios biológicos com soluções tratadas por fotólise direta e UV/H2O2 indicaram remoção completa da atividade antimicrobiana residual, ainda que os produtos da fotodegradação tenham se mostrado não-biodegradáveis. Análises de toxicidade indicaram que o metal zinco presente no antibiótico é responsável pela a toxicidade no micro-organismo-teste Vibrio fischeri. Estudos adicionais devem ser realizados para identificar os sub-produtos formados, bem como para investigar a degradação da Bc-Zn em efluentes industriais reais.<br>The presence of antibiotics in ecosystems represents a serious risk to human and animal health, caused by the increase in bacterial resistance. Since most antibiotics resist to biological degradation, advanced oxidation processes are pointed out as the most effective technologies for degrading these compounds in wastewater. Zinc bacitracin (Bc-Zn) is a potent antibiotic with a complex mixture of non-biodegradable peptides conjugated to zinc. Despite being a widely used antibiotic in human and animal medicine, the scarcity of studies dealing with its degradation and environmental fate is a matter of concern. In this work, Bc-Zn degradation by direct photolysis and the UV/H2O2 process was investigated for different UVC radiation conditions and initial H2O2 concentrations. Kinetic parameters, namely the photolysis quantum yield, pseudo-first order kinetic constants and second-order kinetic constants, were satisfactorily estimated from experimental data by modeling the photochemical system. The results showed that all the congeners of the Bc-Zn mixture were photolyzed at the highest UVC doses applied, while no TOC removal was observed after 120 minutes of irradiation. The addition of H2O2 substantially accelerated Bc-Zn photodegradation, with pseudo-first order kinetic constants of one order of magnitude higher than those observed under direct photolysis. In addition, a remarkable removal of up to 71% of TOC was achieved. Statistical analyses showed that UV radiation had a much more important effect on Bc-Zn photodegradation in comparison with initial H2O2 concentration, with the best process conditions achieved for the highest specific photon emission rate (1.11×10-5 Einstein L-1 s-1). Biological assays carried out with the solutions treated by direct photolysis and UV/H2O2 revealed no residual antimicrobial activity, though photodegradation products remained non-biodegradable. In addition, toxicity analyses indicated that the zinc metal present in the antibiotic is responsible for the toxic effect on the test microorganism Vibrio fischeri. Finally, further studies should be performed to identify the by-products formed and to investigate Bc-Zn degradation in real industrial wastewater.

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>O presente trabalho teve como objetivo estudar o tratamento de efluentes contendo cianeto livre através do sistema H2O2/UV e selecionar as condições operacionais mais adequadas para uma maior eficiência do processo. Para isso, foram empregadas soluções sintéticas de KCN com características de pH e concentração similares às condições de um efluente industrial real. O fotorreator utilizado nos testes de oxidação foi um reator cilíndrico de seção anular, equipado com uma lâmpada de baixa pressão de 28 W concêntrica com emissão em 254 nm, onde a solução ficava diretamente em contato com a mesma. Este fotorreator foi acoplado a um sistema de refrigeração que mantinha a temperatura de operação em 25oC.As variáveis avaliadas foram concentração inicial de cianeto em solução, pH inicial da solução, potência de UV irradiada e razão molar [H2O2]/[CN-]. Para soluções contendo uma concentração inicial de cianeto igual a 100 ppm, foi possível atingir uma eficiência remoção de 99,9 por cento em 25 minutos, em pH igual a 9,5, com uma razão molar [H2O2]:[CN-] igual a 3. Para efluentes contendo uma concentração inicial de cianeto igual a 300 ppm, nas mesmas condições operacionais, alcançou-se a mesma eficiência em 30 minutos.<br>The present work had the objective of studying the treatment of effluents containing free cyanide through the system H2O2/UV, and of selecting the best operational conditions for best efficiency of the process. For that, it was employed synthetic solutions of KCN with characteristics of pH and concentration similar to those of a real effluent. The photoreactor employed in the oxidation tests was a cylindrical reactor of annular section, equipped with a concentrical low pressure lamp of 28 W with emission in 254 nm, where the solution was in direct contact with the lamp. This photoreactor was coupled with a cooling system which kept the operation temperature at 25oC. The evaluated variables were initial cyanide concentration in solution, initial pH of the solution, power of radiated UV and molar ratio [H2O2]/[CN-]. For solutions containing an initial concentration of cyanide equal to 100 ppm, it was possible to reach a removal efficiency of 99.9 per cent in 25 minutes, in pH equal to 9.5, with a molar ratio of [H2O2]:[CN-] equal to 3. For effluents containing an initial concentration of cyanide equal to 300 ppm, at the same operational conditions, it was possible to achieve the same removal efficiency in 30 minutes.

A indústria têxtil gera grandes volumes de efluentes com elevada carga orgânica, forte coloração e toxicidade. Neste trabalho, estuda-se o tratamento de solução aquosa contendo o corante Solophenyl Yellow Arle 154% por meio dos processos O3-H2O2/UV e foto-Fenton, avaliando-se as repostas: remoção de cor em 5 minutos, remoção de cor em 60 minutos, taxa máxima de remoção de cor e remoção de COT em 60 minutos. Os experimentos foram realizados em semibatelada com circulação usando um reator fotoquímico com campo de radiação anular coaxial, constituído de corpo cilíndrico em aço com refletor interno de alumínio para 12 lâmpadas fixadas simetricamente na superfície refletora e um tubo reator em quartzo de 0,7 L, posicionados verticalmente no eixo do refletor. Para o processo O3-H2O2/UV foram utilizadas lâmpadas Phillips TUV (36 W, 254 nm). A corrente gasosa contendo O3 foi introduzida no reator por meio de um difusor. Para o processo foto-Fenton foram utilizadas lâmpadas Sylvania (12 W cada, 300 400 nm) e concentração de Fe(II) de 0,25 mmol/L. Em ambos os processos, solução de peróxido de hidrogênio foi adicionada durante os 30 minutos iniciais de tratamento. As amostras foram analisadas por medidas de carbono orgânico total (COT) e remoção de cor (absorbância medida em 405 nm em espectrofotômetro UV-visível). Em ambos os processos utilizou-se o planejamento experimental Doehlert, definindo os valores mínimo e máximo para cada variável adotada. No caso do processo O3- H2O2/UV (ETAPA I), foram estudados os efeitos da potência elétrica total das lâmpadas (144 432 W), concentração de H2O2 (5 30 mmol/L), concentração inicial de corante (20 100 mg/L), concentração de ozônio (10 40 mg/L) e pH (3 10). No processo foto-Fenton (ETAPA II), estudaram-se os efeitos da potência (160 480 W), concentração de H2O2 (5 30 mmol/L) e concentração inicial de corante (20 100 mg/L). Os resultados da ETAPA I indicaram que o aumento da concentração do corante, em meio ácido, aumenta a remoção de cor em 5 e 60 minutos, sugerindo a eficiência da ação via ozônio molecular sob o grupo cromóforo do corante. Os melhores resultados apresentaram remoção acima de 95% em 5 e 60 minutos de tratamento. Entretanto, para a remoção de COT em 60 minutos o processo não foi eficiente, apresentando resultado máximo de 35,6%. Na ETAPA II obtiveram-se resultados menos satisfatórios para remoção de cor se comparados aos da ETAPA I (56,1% em 5 minutos e 78% em 60 minutos de tratamento), mas melhores em relação à remoção de COT em 60 minutos atigindo 45,1% de remoção. As maiores taxas de remoção de cor foram observadas nos 5 primeiros minutos de tratamento para todos os experimentos. Experimentos complementares realizados em uma terceira etapa (ETAPA III) mostraram que a aplicação do processo O3 seguido do processo foto-Fenton permitiu resultados satisfatórios tanto para remoção de cor (97,2%), quanto para remoção de COT (69,5%). O estudo da ação do processo O3 em modo contínuo e a avaliação econômica preliminar do processo integrado O3 - foto-Fenton sugerem o potencial de aplicação do tratamento integrado a indústrias têxteis.<br>The textile industry generates large volumes of wastewater with high organic load, strong coloration and toxicity. In this work, the treatment of an aqueous solution containing the dye Solophenyl Yellow Arle 154% was studied by the O3-H2O2/UV and photo-Fenton processes, in order to evaluate the responses color removal after 5 minutes; color removal after 60 minutes; maximum rate of color removal; and TOC removal after 60 minutes. The experiments were carried out in the semi-batch mode with circulation using a photochemical reactor with annular coaxial radiation field, consisting of a cylindrical stainless steel support with an aluminum internal reflector with 12 lamps fixed symmetrically in the internal reflecting surface, and a quartz tube reactor of 0.7 L, positioned vertically along the axis of the reflector. For the O3- H2O2/UV process, Phillips TUV lamps (36 W, 254 nm) were used; the gas stream containing zone was introduced into the reactor through a diffuser. For the photo- Fenton process, Sylvania lamps (12 W each, 300 - 400 nm) and a concentration of Fe (II) of 0.25 mmol/L were used. In both cases, the hydrogen peroxide solution was added in the first 30 minutes of treatment. The samples were analyzed by the measurement of total organic carbon (TOC) and color removal (absorbance measured at 405 nm in a UV-visible spectrophotometer). In both cases the Doehlert experimental design was used, defining the minimum and maximum values of each variable adopted. In the case of O3-H2O2/UV process (PHASE I), the effects of the total electric power of the lamps (144 - 432 W), H2O2 concentration (5 - 30 mmol/L), initial dye concentration (20 - 100 mg/L), ozone concentration (10 - 40 mg/L), and pH (3 - 10) were studied. For the photo-Fenton process, the studied variables were: total electric power of the lamps (160 - 480 W), H2O2 concentration (5 - 30 mmol/L), and initial dye concentration (20 - 100 mg/L). The results of PHASE I indicated that the increase of dye concentration in acidic conditions increases color removal after 5 and 60 minutes, thus suggesting the efficiency of molecular ozone action upon the chromophore group of the dye. The best results showed color removal above 95% after 5 and 60 minutes of treatment. However, for the TOC removal the process was not efficient, with maximum removal after 60 minutes of only 35.6%. In PHASE II less satisfactory results for color removal were obtained in comparison with PHASE I (56.1% after 5 minutes and 78% after 60 minutes of treatment), but with higher TOC removal after 60 minutes, achieving over 45.1%. The highest color removal rates were observed within the first 5 minutes of treatment for all runs. Additional experiments carried out in PHASE III showed that the oxidation by O3 followed by the photo-Fenton process enabled to achieve suitable results for both color (97.2%) and TOC removals (69.5%). The study of the O3 process in the continuous mode and a preliminary economic evaluation suggests a high potential for the use of the integrated O3-photo-Fenton process in textile industries.

Cilj&nbsp; istraživanja&nbsp; u&nbsp; okviru&nbsp; ove&nbsp; doktorske&nbsp; disertacije&nbsp; je&nbsp; utvrđivanje&nbsp; efekata&nbsp; različitihoksidacionih procesa na bazi ozona, vodonik-peroksida i UV zračenja na sadržaj i reaktivnost prirodnih&nbsp; organskih&nbsp; materija&nbsp; (POM)&nbsp; u&nbsp; različitim&nbsp; vodenim&nbsp; matriksima.&nbsp; Ispitivanja&nbsp; su sprovedena&nbsp; na&nbsp; a)&nbsp; podzemnoj&nbsp; vodi&nbsp; sa&nbsp; teritorije&nbsp; Kikinde&nbsp; i&nbsp; Temerina&nbsp; (prirodni&nbsp; matriks)&nbsp; i&nbsp; b) sintetičkom&nbsp; vodenom&nbsp; matriksu&nbsp; (rastvoru&nbsp; komercijalno&nbsp; dostupne&nbsp; huminske&nbsp; kiseline),&nbsp; koji&nbsp; se među sobom razlikuju po sastavu i strukturi prisutne POM i sadržaju bromida. Za oksidacioni proces&nbsp; (ozonizacija,&nbsp; UV&nbsp; fotoliza,&nbsp; oksidacija&nbsp; sa&nbsp; H₂O₂,&nbsp; kombinovani&nbsp; O ₃/UV&nbsp; proces&nbsp; i kombinovani&nbsp; H ₂O₂/UV&nbsp; proces)&nbsp; pojedinačno&nbsp; ispitan&nbsp; je&nbsp; uticaj&nbsp; različitih&nbsp; doza&nbsp; oksidanata&nbsp; i reakcionih&nbsp; uslova.Posebna&nbsp; pažnja&nbsp; posvećena&nbsp; je&nbsp; ispitivanju&nbsp; uticaja&nbsp; navedenih&nbsp; tretmana&nbsp; naformiranje&nbsp; neorganskog&nbsp; bromata,&nbsp; kao&nbsp; i&nbsp; uticaja&nbsp; na&nbsp; sadržaj&nbsp; prekursora&nbsp;&nbsp; dezinfekcionih nusproizvoda nakon hlorisanja (THM, HAA, HAN, HK i CP).Analiza&nbsp; hemijskih&nbsp; parametara&nbsp; sintetičkog&nbsp; matriksa&nbsp; (5,44&plusmn;0,30&nbsp; mg&nbsp; C/l; 0,255&plusmn;0,015 cm^-1 ;&nbsp; 4,68&plusmn;0,41&nbsp; lm^-1 mg ^-1)&nbsp; pokazuje&nbsp; da&nbsp; u&nbsp; njemu&nbsp; preovladavaju&nbsp; huminnske materije&nbsp; visoke&nbsp; hidrofobnosti.&nbsp; Visok&nbsp; sadržaj&nbsp; POM&nbsp; pretežno&nbsp; hidrofobnog&nbsp; karaktera&nbsp; je zabeležen i u vodi iz Kikinde (5,170,72 mg C/l; 0,2010,001 cm &nbsp;&nbsp;^-1&nbsp;&nbsp; ; 3,88&plusmn;0,70 lm&nbsp;^-1&nbsp; mg^-1 ), dok je&nbsp; sadrža&nbsp;j&nbsp; POM&nbsp; u&nbsp; sirovoj&nbsp; vodi&nbsp; iz&nbsp; Temerina&nbsp; (2,060,38&nbsp; mg&nbsp; C/l;&nbsp; 0,0500,001&nbsp; cm&nbsp;&nbsp;^-1&nbsp;&nbsp;&nbsp; ; 2,43&plusmn;0,21 lm &nbsp;^-1&nbsp; mg ^-1&nbsp;&nbsp;&nbsp;) značajno niži i preovladavaju POM hidrofilnog karaktera. Veći stepen hidrofobnosti sintetičkog matriksa u poređenju sa&nbsp; prirodnim matriksima, rezultovao&nbsp; je&nbsp; i&nbsp; većom&nbsp; reaktivnosti&nbsp; organske&nbsp; materije&nbsp; sa&nbsp; hlorom,&nbsp; &scaron;to&nbsp; se&nbsp; može&nbsp; zaključiti&nbsp; naosnovu visokih vrednosti PFDBP nakon hlorisanja. Vrednost PFTHM u sintetičkom matriksu iznosi&nbsp; 544&plusmn;85,9&nbsp; &micro;g/l,&nbsp; dok&nbsp; je&nbsp; PFTHM&nbsp; u&nbsp; kikindskoj&nbsp; i&nbsp; temerinskoj&nbsp; sirovoj&nbsp; vodi&nbsp; znatno&nbsp; niži (279&plusmn;32,3&nbsp; i&nbsp; 180&plusmn;44,0&nbsp; &micro;g/l,&nbsp; respektivno).&nbsp; Vrednost&nbsp; PFHAA&nbsp; u&nbsp; sintetičkom&nbsp; matriksu&nbsp; iznosi 484&plusmn;77,5 &micro;g/l, dok je PFHAA u kikindskoj 244&plusmn;11,1 &micro;g/l i u temerinskoj vodi 165&plusmn;32,5 &micro;g/l. Sadržaj&nbsp; HK&nbsp; (8,05&plusmn;3,63&nbsp; &micro;g/l&nbsp; sintetički&nbsp; matriks;&nbsp; 14,91,38&nbsp; &micro;g/l&nbsp; Kikinda;&nbsp; 7,400,25&nbsp; &micro;g/l Temerin)&nbsp; je&nbsp; znatno&nbsp; niži&nbsp; u&nbsp; poređenju&nbsp; sa&nbsp; prekursorima&nbsp; THM&nbsp; i&nbsp; HAA,&nbsp; dok&nbsp; prekursori&nbsp; HAN&nbsp; i hlorpikrina&nbsp; nisu&nbsp; detektovani&nbsp; u&nbsp; sirovoj&nbsp; vodi.&nbsp; Nusproizvodi&nbsp; koji&nbsp; se&nbsp; dominantno&nbsp; formiraju&nbsp; u svim&nbsp; ispitivanim&nbsp; vodenim&nbsp; matriksima&nbsp; su&nbsp; hlorovani&nbsp; THM&nbsp; i&nbsp; HAA,&nbsp; dok&nbsp; se&nbsp; bromovani&nbsp; DBPformiraju u znatno nižim koncentracijama. Zastupljenost bromovanih DBP u temerinskoj vodije&nbsp; znatno&nbsp; veći&nbsp; u&nbsp; poređenju&nbsp; sa&nbsp; vodom&nbsp; iz&nbsp; Kikinde,&nbsp; kao&nbsp; rezultat&nbsp; prisustva&nbsp; veće&nbsp; koncentracije bromida u sirovoj vodi (0,05&plusmn;0,01 mg Br -/l Temerin; 0,03&plusmn;0,01 mg Br-/l Kikinda). Ispitivanjem&nbsp; uticaja&nbsp; oksidacionih&nbsp; procesa&nbsp; (UV&nbsp; fotolize,&nbsp; ozonizacije,&nbsp; oksidacije vodonik-peroksidom)&nbsp; na&nbsp; sadržaj&nbsp; i&nbsp; reaktivnost&nbsp; POM&nbsp; u&nbsp; ispitivanim&nbsp; vodenim&nbsp; matriksima utvrđeno&nbsp; je&nbsp; da&nbsp; tretman&nbsp; vode&nbsp; UV&nbsp; zračenjem&nbsp; i&nbsp; vodonik-peroksidom,&nbsp; kada&nbsp; se&nbsp; primenjuju&nbsp; kao samostalan&nbsp; tretman,&nbsp; ne&nbsp; pokazuju&nbsp; značajnu&nbsp; efikasnost&nbsp; u&nbsp; smanjenju&nbsp; sadržaja&nbsp; POM.Tretman vode&nbsp; ozonom&nbsp; se&nbsp; pokazao&nbsp; kao&nbsp; veoma&nbsp; efikasan&nbsp; u&nbsp; uklanjanju&nbsp; POM&nbsp; i&nbsp; u&nbsp; smanjenju&nbsp; sadržaja prekursora&nbsp; DBP&nbsp; kod&nbsp; svih&nbsp; ispitivanih&nbsp; vodenih&nbsp; matriksa,&nbsp; kao&nbsp; rezultat&nbsp; smanjenja&nbsp; reaktivnosti POM&nbsp; ka&nbsp; formiranju&nbsp; ovih&nbsp; DBP.&nbsp; Smanjenje&nbsp; sadržaja&nbsp; POM&nbsp; u&nbsp; vodi&nbsp; tokom&nbsp; tretmana&nbsp; raste&nbsp; sa povećanjem&nbsp; primenjene&nbsp; doze&nbsp; ozona,&nbsp; pri&nbsp; čemu&nbsp; se&nbsp; najbolji&nbsp; rezultati&nbsp; postižu&nbsp; pri&nbsp; najvećoj primenjenoj&nbsp; dozi&nbsp; od&nbsp; 3,0&nbsp; mg&nbsp; O 3/mg&nbsp; DOC&nbsp; (do&nbsp; 32%&nbsp; DOC,&nbsp; 92%&nbsp; UV254 sintetički&nbsp; matriks;&nbsp; do 17%&nbsp; DOC,&nbsp; 76%&nbsp; UV 254&nbsp; Kikinda;&nbsp; do&nbsp; 15%&nbsp; DOC&nbsp; i&nbsp; 66%&nbsp; UV254&nbsp;&nbsp;&nbsp; Temerin).&nbsp; U&nbsp; sintetičkom matriksu&nbsp; najveće&nbsp; smanjenje&nbsp; PFTHM&nbsp; (za&nbsp; 76%)&nbsp; i&nbsp; PFHAA&nbsp; (za&nbsp; 80%)&nbsp; u&nbsp; odnosu&nbsp; na&nbsp; sadržaj&nbsp; u sirovoj vodi se postiže pri dozi od 1,0&nbsp; mg O₃/mg DOC. Najveće smanjenje PFTHM (za 38%)i PFHAA (za 42%) u vodi iz Kikinde postiže se pri dozi od 3,0 mg O ₃/mg DOC. U vodi iz Temerina najveće smanjenje PFTHM (za&nbsp; 27%) je pri dozi od 3,0 mg O ₃ /mg DOC, dok se za smnjenje&nbsp; PFHAA&nbsp; (za&nbsp; 54%)&nbsp; najbolje&nbsp; pokazala&nbsp; doza&nbsp; od&nbsp; 1,0&nbsp; mg&nbsp; O3 /mg&nbsp; DOC.&nbsp; Sadržaj prekursora&nbsp; HK&nbsp; i&nbsp; HAN&nbsp; (temerinska&nbsp; voda)&nbsp; je&nbsp; veoma&nbsp; nizak&nbsp; nakon&nbsp; tretmana.&nbsp; Tretman&nbsp; vode ozonom&nbsp; vodi&nbsp; ka&nbsp; formiranju&nbsp; DBP&nbsp; sa&nbsp; vi&scaron;e&nbsp;&nbsp; supstituisanih&nbsp; atoma&nbsp; broma,&nbsp; dok&nbsp; u&nbsp; vodama&nbsp; sa srednjim sadržajem bromida (50 &micro;g Br -/l) dovodi do formiranja bromata. Kombinacijom&nbsp; ozonizacije&nbsp; sa&nbsp; UV&nbsp; zračenjem&nbsp; se&nbsp; značajno&nbsp; može&nbsp; pospe&scaron;iti&nbsp; efiksnost uklanjanja&nbsp; POM&nbsp; postignuta&nbsp; primenom&nbsp; samostalne&nbsp; ozonizacije.&nbsp; Najveće&nbsp; smanjenje&nbsp; sadržaja POM u&nbsp; sintetičkom matriksu (za 85% DOC, 98% UV254 i 87% SUVA), u vodi iz Kikinde (za23% DOC, 83% UV 254, 77% SUVA), i vodi iz Temerina (za 15% DOC, 80% UV254 i 75% SUVA), u odnosu na vrednosti u netretiranoj vodi postignuto je pri najvećoj primenjenoj dozi od&nbsp; 3,0&nbsp; mg&nbsp; O₃ /mg&nbsp; DOC&nbsp; i&nbsp; 6000&nbsp; mJ/cm 2 .&nbsp; Efikasnost&nbsp; procesa&nbsp; raste&nbsp; u&nbsp; vodama&nbsp; u&nbsp; kojima preovladavaju&nbsp; POM&nbsp; veće&nbsp; hidrofobnosti.&nbsp; MeĎutim,&nbsp; iako&nbsp; se&nbsp; O₃ /UV&nbsp; procesom&nbsp; postiže&nbsp; visok stepen&nbsp; smanjenja&nbsp; PFTHM&nbsp; u&nbsp; sintetičkom&nbsp; matriksu&nbsp; se&nbsp; najbolje&nbsp; pokazao&nbsp; tretman&nbsp; ozonom (1,0 mg&nbsp; O3/mg&nbsp; DOC),&nbsp; dok&nbsp; se&nbsp; najveće&nbsp; smanjenje&nbsp; PFHAA&nbsp; (82%)&nbsp; postiže&nbsp; pri&nbsp; dozi&nbsp; ozona&nbsp; od 1,0 mg O_3/mg DOC i UV zračenja od 6000 mJ/cm ^{2 .} U vodi iz Kikinde se PFTHM smanjuje za 50% pri dozi od 3,0 mg O ₃/mg DOC i 6000 mJ/cm 2 , dok se u slučaju uklanjanja prekursoraHAA&nbsp; ozonizacija&nbsp; pokazala&nbsp; kao&nbsp; superiorniji&nbsp; proces.&nbsp; U&nbsp; vodi&nbsp; iz&nbsp; Temerina&nbsp; se&nbsp; u&nbsp; pogledu uklanjanja&nbsp; prekursora&nbsp; THM&nbsp; i&nbsp; HAA&nbsp; ozonizacija&nbsp; pokazala&nbsp; kao&nbsp; optimalan&nbsp; proces.&nbsp; Visok alkalitet&nbsp; prirodnih&nbsp; voda&nbsp; inhibira&nbsp; radikalski&nbsp; mehanizam&nbsp; u&nbsp; toku&nbsp; AOP&nbsp; i&nbsp; favorizuje&nbsp; oksidaciju POM molekulskim ozonom.&nbsp; Prekursori HK se formiraju u&nbsp; veoma niskim koncentracijama i njihov sadržaj ne varira značajno tokom tretmana. U prirodnim matriksima tokom AOP pri dozi&nbsp; ozona&nbsp; od&nbsp; 3,0 mg&nbsp; O₃ /mg&nbsp; DOC&nbsp; dolazi&nbsp; do&nbsp; formiranja&nbsp; HAN,&nbsp; međutim,&nbsp; nije&nbsp; uočen&nbsp; jasan trend&nbsp; sa&nbsp; povećanjem&nbsp; doze&nbsp; UV&nbsp; zračenja.&nbsp; Tretman&nbsp; doprinosi&nbsp; formiranju&nbsp; bromovanih&nbsp; vrsta THM,&nbsp; dok&nbsp; se&nbsp; tokom&nbsp; AOP&nbsp; pri&nbsp; najvećoj&nbsp; dozi&nbsp; ozona&nbsp; od&nbsp; 3,0 mg&nbsp; O₃ /mg&nbsp; DOC&nbsp; formiraju bromovani HAN.Najveće&nbsp; smanjenje&nbsp; sadržaja&nbsp; POM&nbsp; primenom&nbsp; kombinacije&nbsp; oksidacije&nbsp; sa&nbsp; H ₂O₂i&nbsp; UV zračenja u sintetičkom matriksu (za do 17% DOC, 70% UV 254 ), u vodi iz Kikinde (za do 22% DOC, 53% UV₂₅₄), i vodi iz Temerina (za do 7% DOC, 68% UV₂₅₄), u odnosu na vrednosti u sirovoj vodi, se postižu pri dozi H ₂O₂ i UV zračenja od 3,0 mg H₂O₂/mg DOC i 6000 mJ/cm ² .Najveće&nbsp; smanjenje&nbsp; PFTHM&nbsp; od&nbsp; 54%&nbsp; u&nbsp; sintetičkom&nbsp; matriksu&nbsp; se&nbsp; postiže&nbsp; pri&nbsp; dozi&nbsp; od 0 mg H₂O₂/mg DOC i 6000 mJ/cm ² ,&nbsp; dok se smanjenje PFHAA (za 35%)&nbsp; postiže primenom doze vodonik-peroksida i UV zračenja od 1,0 mg H ₂O₂ /mg&nbsp; DOC i 3000 mJ/cm ² . U vodi izKikinde&nbsp; H₂O₂ /UV&nbsp; proces&nbsp; ne&nbsp; utiče&nbsp; značajno&nbsp; na&nbsp; sadržaj&nbsp; prekursora&nbsp; THM,&nbsp; dok&nbsp; se&nbsp; najveće smanjenje&nbsp; PFHAA&nbsp; (za&nbsp; 35%)&nbsp; postiže&nbsp; pri&nbsp; dozi&nbsp; od&nbsp; 3,0&nbsp; mg&nbsp; H_{&nbsp;2&nbsp;}O₂/mg&nbsp; DOC&nbsp; i&nbsp; 600&nbsp; mJ/cm ² .H&nbsp;₂&nbsp;O₂&nbsp;/UV&nbsp; proces&nbsp; dovodi&nbsp; do&nbsp; smanjenja&nbsp; PFTHM&nbsp; u&nbsp; Temerinskoj&nbsp; vodi&nbsp; za&nbsp; 74%&nbsp; pri&nbsp; dozi&nbsp; od 3,0 mg H₂O₂/mg DOC i 600 mJ/c&nbsp;m ² ,&nbsp; dok primenjeni tretman ne pokazuje značajan uticaj naPFHAA.&nbsp; Prekursori HK su detektovani u sintetičkom matriksu i temerinskoj vodi u niskim koncentracijama.&nbsp; U&nbsp; temerinskoj&nbsp; vodi&nbsp; nakon&nbsp; AOP&nbsp; pri&nbsp; dozi&nbsp; vodonik-peroksida&nbsp; od 3,0 mg H₂O₂ /mg DOC dolazi&nbsp; do formiranja HAN i hlorpikrina. Primenjeni tretman vodi ka formiranju bromovanih DBP. Svi rezultati dobijeni u toku istraživanja ukazuju na neophodnost optimizacije procesa u&nbsp; tretmanu&nbsp; ispitivanih&nbsp; vodenih&nbsp; matriksa&nbsp; i&nbsp; određivanja&nbsp; optimalnog&nbsp; procesa uzimajući&nbsp; u&nbsp; obzirkarakteristika&nbsp; sirove&nbsp; vode&nbsp; i&nbsp; efikasnost&nbsp; koja&nbsp; se&nbsp; želi&nbsp; postići.Kombinacijom&nbsp; dva&nbsp; i&nbsp; vi&scaron;e konvencionalnih&nbsp; tretmana&nbsp; i&nbsp; optimizacijom&nbsp; reakcionih&nbsp; uslova&nbsp; može&nbsp; se&nbsp; postići&nbsp; visoka efikasnost uklanjanja POM, kao i ciljano uklanjanje prekursorskog materijala odabranih DBP, međutim&nbsp; tretman&nbsp; vode&nbsp; ozonom&nbsp; pri&nbsp; dozi&nbsp; od&nbsp; 1,0 mg&nbsp; O₃/mg&nbsp; DOC&nbsp; se&nbsp; pokazao&nbsp; kao&nbsp; optimalan proces.<br>The aim of the research&nbsp; of&nbsp; this&nbsp; PhD thesis&nbsp; was&nbsp; to determine the effects of various oxidation processes based on ozone, hydrogen peroxide and UV irradiation on the content and reactivity of natural organic matter&nbsp; (NOM)&nbsp; in different water matrices. The&nbsp; tests were carried out&nbsp; on&nbsp; a)&nbsp; groundwater&nbsp; from&nbsp; the&nbsp; territory&nbsp; of&nbsp; Kikinda&nbsp; and&nbsp; Temerin&nbsp; (natural&nbsp; matrix)&nbsp; and&nbsp; b) synthetic aqueous matrix (solution of commercially available humic&nbsp; acid), which differ in the composition&nbsp; and&nbsp; structure&nbsp; of&nbsp; NOM&nbsp; present&nbsp; and&nbsp; the&nbsp; content&nbsp; of&nbsp; bromide.&nbsp; For&nbsp; the&nbsp; oxidation process&nbsp; (ozonation,&nbsp; UV&nbsp; photolysis,&nbsp; oxidation&nbsp; with&nbsp; H 2O2 ,&nbsp; combined&nbsp; O 3 /UV&nbsp; process&nbsp; and combined&nbsp; H 2O2 /UV&nbsp; process),&nbsp; the&nbsp; influence&nbsp; of&nbsp; different&nbsp; doses&nbsp; of&nbsp; oxidants&nbsp; and&nbsp; reaction conditions&nbsp; was&nbsp; examined&nbsp; individually.&nbsp; Particular&nbsp; attention&nbsp; was&nbsp; paid&nbsp; to&nbsp; the&nbsp; influence&nbsp; of&nbsp; the above treatment on the formation of inorganic bromate, as well as the effect on the content of precursors of disinfectant by-products after chlorination (THM, HAA, HAN, HK and CP).Analysis&nbsp; of&nbsp; the&nbsp; chemical&nbsp; parameters&nbsp; of&nbsp; the&nbsp; synthetic&nbsp; matrix&nbsp; (5.44&plusmn;0.30&nbsp; mg&nbsp; C/L; 0.255&plusmn;0.015 cm -1 ;&nbsp; 4.68&plusmn;0.41&nbsp; lm -1 mg -1 )&nbsp; shows&nbsp; that&nbsp; the&nbsp; high-hydrophobic&nbsp; humic&nbsp; compounds predominate in this water. Also, high NOM content of predominantly hydrophobic character was recorded in Kikinda water (5.170.72 mg C/L; 0.2010.001 cm -1 ;&nbsp; 3.88&plusmn;0.70 lm -1 mg -1 ), while&nbsp; NOM&nbsp; content&nbsp; in&nbsp; raw&nbsp; water&nbsp; from&nbsp; Temerin&nbsp; (2.060.38&nbsp; mg&nbsp; C/L;&nbsp; 0.0500.001&nbsp; cm -1 ; 2.43&plusmn;0.21 lm -1 mg -1 ) significantly lower and predominate NOM of hydrophilic character. A higher degree of hydrophobicity of the synthetic matrix in comparison with&nbsp; natural matrices, resulted in higher reactivity of organic matter with chlorine, which can be concluded on&nbsp; the&nbsp; basis&nbsp; of&nbsp; high&nbsp; PFDBP&nbsp; values&nbsp; after&nbsp; chlorination.&nbsp; The&nbsp; PFTHM&nbsp; value&nbsp; in&nbsp; the&nbsp; synthetic matrix&nbsp; was&nbsp; 544&plusmn;85.9 &micro;g/L, while the PFTHM in the raw waters from Kikinda and Temerin was&nbsp; significantly&nbsp; lower&nbsp; (279&plusmn;32.3&nbsp; and&nbsp; 180&plusmn;44.0&nbsp; &micro;g/L,&nbsp; respectively).&nbsp; The&nbsp; PFHAA&nbsp; value&nbsp; in the&nbsp; synthetic&nbsp; matrix&nbsp; was&nbsp; 484&plusmn;77.5&nbsp; &micro;g/L,&nbsp; while&nbsp; PFHAA&nbsp; in&nbsp; the&nbsp; Kikinda&nbsp; water&nbsp; was 223 244&plusmn;11.1 &micro;g/L&nbsp; and in&nbsp; the&nbsp; Temerin&nbsp; water&nbsp; was&nbsp; 165&plusmn;32.5 &micro;g/L.&nbsp; The content of&nbsp; precursors of HK&nbsp; (8.05&plusmn;3.63&nbsp; &micro;g/L&nbsp; synthetic&nbsp; matrix;&nbsp; 14.91.38&nbsp; &micro;g/L&nbsp; Kikinda;&nbsp; 7.400.25&nbsp; &micro;g/L&nbsp; Temerin) was&nbsp; significantly&nbsp; lower&nbsp; compared&nbsp; to&nbsp; precursors&nbsp; of&nbsp; THMs&nbsp; and&nbsp; HAAs,&nbsp; while&nbsp; precursors&nbsp; of HANs&nbsp; and&nbsp; chloropicrin&nbsp; were&nbsp; not&nbsp; detected&nbsp; in&nbsp; raw&nbsp; water.&nbsp; The&nbsp; by- products&nbsp; that&nbsp; were predominantly&nbsp; formed&nbsp; in&nbsp; all&nbsp; the&nbsp; tested&nbsp; water&nbsp; matrices&nbsp; were&nbsp; chlorinated&nbsp; THMs&nbsp; and&nbsp; HAAs, while the brominated DBPs&nbsp; were&nbsp; formed at substantially lower concentrations. The presence of&nbsp; brominated DBPs&nbsp; in&nbsp; Temerine&nbsp; water&nbsp; were&nbsp; significantly higher compared to Kikinda water as&nbsp; a&nbsp; result&nbsp; of&nbsp; the&nbsp; presence&nbsp; of&nbsp; higher&nbsp; bromide&nbsp; content&nbsp; in&nbsp; raw&nbsp; water&nbsp; (0.05&plusmn;0.01&nbsp; mg&nbsp; Br -/L Temerin; 0.03&plusmn;0.01 mg Br -/L Kikinda). By&nbsp; examining&nbsp; the&nbsp; influence&nbsp; of&nbsp; oxidation&nbsp; processes&nbsp; (UV&nbsp; photolysis,&nbsp; ozonation,hydrogen&nbsp; peroxide&nbsp; oxidation)&nbsp; on&nbsp; the&nbsp; content&nbsp; and&nbsp; reactivity&nbsp; of&nbsp; NOM&nbsp; in&nbsp; the&nbsp; tested&nbsp; water matrix, it was&nbsp; found that the UV&nbsp; irradiation and&nbsp; treatment by&nbsp; hydrogen peroxide, when used as an independent treatment, did&nbsp; not show significant efficacy in reducing the&nbsp; NOM content. Water treatment by ozone&nbsp; proved to be very effective in eliminating&nbsp; NOM and reducing the content of DBP precursors in all tested water&nbsp; matrices, as a result of the reduction of&nbsp; NOM reactivity &nbsp; to&nbsp; the&nbsp; formation&nbsp; of&nbsp; these&nbsp; DBPs.&nbsp; Reduction&nbsp; of&nbsp; NOM&nbsp; content&nbsp; in&nbsp; water&nbsp; during treatment increased&nbsp; with increasing the applied dose of ozone, with the best results achieved at the highest dosage of&nbsp; 3.0 mg O 3/mg DOC&nbsp; (up to 32% DOC, 92% UV 254&nbsp; synthetic matrix, up&nbsp; to&nbsp; 17%&nbsp; DOC,&nbsp; 76%&nbsp; UV 254 Kikinda,&nbsp; up&nbsp; to&nbsp; 15%&nbsp; DOC&nbsp; and&nbsp; 66%&nbsp; UV254 Temerin).&nbsp; In&nbsp; the synthetic&nbsp; matrix the highest reduction&nbsp; in&nbsp; PFTHM (76%) and PFHAA (by 80%)&nbsp; compared to raw water content&nbsp; was&nbsp; achieved at a dosage&nbsp; of 1.0 mg O 3/mg DOC. The highest reduction in PFTHM&nbsp; (38%)&nbsp; and&nbsp; PFHAA&nbsp; (42%)&nbsp; in&nbsp; Kikinda&nbsp; water&nbsp; was&nbsp; achieved&nbsp; at&nbsp; a&nbsp; dose&nbsp; of 3.0 mg O3 /mg DOC. In Temerin water, the highest reduction in PFTHM (27%) was at a dose of&nbsp; 3.0 mg O 3/mg DOC, while the dose of 1.0&nbsp; mg O3 /mg&nbsp; DOC&nbsp; was best shown for removing PFHAA (by 54%). The content of the precursors of HKs and HANs (Temerin water) was very low&nbsp; after&nbsp; treatment.&nbsp; Water&nbsp; treatment&nbsp; by&nbsp; ozone&nbsp; led&nbsp; to&nbsp; the&nbsp; formation&nbsp; of&nbsp; DBPs&nbsp; with&nbsp; more substituted bromine atoms, while in waters with a mean bromide content (50 &mu;g Br -/L) led&nbsp; to bromate formation.Combination of ozonation with UV irradiation can greatly accelerate the effectiveness of&nbsp; NOM&nbsp; removal&nbsp; achieved&nbsp; by&nbsp; the&nbsp; use&nbsp; of&nbsp; ozonation&nbsp; alone.&nbsp; The&nbsp; highest&nbsp; reduction&nbsp; in&nbsp; NOM content in the synthetic matrix (by 85% DOC, 98% UV 254 and 87% SUVA), in Kikinda water (by 23%&nbsp; DOC, 83% UV 254 , 77% SUVA) and water from Temerin (by 15% DOC, 80% UV 254 and 75% SUVA), compared to the values in&nbsp; raw&nbsp; water, was achieved at the highest&nbsp; dose of 3.0&nbsp; mg&nbsp; O 3 /mg&nbsp; DOC&nbsp; and&nbsp; 6000&nbsp; mJ/cm 2 .&nbsp; The&nbsp; efficiency&nbsp; of&nbsp; the&nbsp; process&nbsp; was&nbsp; growing&nbsp; in&nbsp; the waters where NOM predominates of hydrophobicity. Although the O 3 /UV process achieved a high&nbsp; degree&nbsp; of&nbsp; reduction&nbsp; in&nbsp; PFTHM&nbsp; in&nbsp; the&nbsp; synthetic&nbsp; matrix&nbsp; the&nbsp; ozonation (1.0 mg O3 /mg DOC)&nbsp; was&nbsp; proved&nbsp; as&nbsp; more&nbsp; efficient,&nbsp; while&nbsp; the&nbsp; highest&nbsp; reduction&nbsp; in&nbsp; PFHAA (82%)&nbsp; was&nbsp; achieved&nbsp; at&nbsp; a&nbsp; ozone&nbsp; dose&nbsp; of&nbsp; 1.0&nbsp; mg&nbsp; O 3/mg&nbsp; DOC&nbsp; and&nbsp; UV&nbsp; irradiation&nbsp; of 6000 mJ/cm 2 . In the water from Temerin,&nbsp; in case to removal of precursors of THM and HAA, ozonation&nbsp; was proved&nbsp; to be an optimal process. High alkalinity of natural waters&nbsp; inhibits the radical &nbsp; mechanism&nbsp; during&nbsp; AOP&nbsp; and&nbsp; favors&nbsp; NOM&nbsp; oxidation&nbsp; with&nbsp; molecular&nbsp; ozone.&nbsp; HKs precursors were formed at very low concentrations and their content did not vary significantly during&nbsp; the&nbsp; treatment.&nbsp; In&nbsp; natural&nbsp; matrices&nbsp; during&nbsp; the&nbsp; AOP&nbsp; at&nbsp; a&nbsp; ozone&nbsp;&nbsp; dose&nbsp; of 3.0 mg O3 /mgDOC, HANs&nbsp; were&nbsp; formed, however, there&nbsp; was&nbsp; no clear trend with increasing UV irradiation. The treatment contributed to the formation of brominated THM species, while during&nbsp; the&nbsp; AOPs,&nbsp; brominated&nbsp; HANs&nbsp; were&nbsp; formed&nbsp; at&nbsp; the&nbsp; maximum&nbsp; dose&nbsp; of&nbsp; ozone&nbsp; of 3.0 mg O3/mg DOC. 224 The largest decrease in&nbsp; NOM content by the combination of oxidation with H2O2 and UV irradiation in the synthetic matrix (for up to 17% DOC, 70% UV 254 ), in Kikinda water (up to 22% DOC, 53% UV 254), and water from Temerin&nbsp; (7% DOC, 68% UV 254 ), compared&nbsp; to the values&nbsp; in&nbsp; raw&nbsp; water,&nbsp; were&nbsp; obtained&nbsp; at&nbsp; a&nbsp; dose&nbsp; of&nbsp; H 2O2 and&nbsp; UV&nbsp; irradiation&nbsp; of 3.0 mg O3 /mg DOC&nbsp; and 6000 mJ/cm 2 . The highest PFTHM reduction of 54% in the&nbsp; synthetic matrix was achieved at a dosage of 1.0 mg H2O2/mg DOC and 6000 mJ/cm 2 , while a decrease in&nbsp; PFHAA&nbsp; (35%)&nbsp; was&nbsp; achieved&nbsp; using&nbsp; a&nbsp; dose&nbsp; of&nbsp; hydrogen&nbsp; peroxide&nbsp; and&nbsp; UV&nbsp; irradiation&nbsp; of 1.0 mg H2O2/mg DOC and 3000 mJ/cm 2 . In the water from Kikinda, the H2O2 /UV process did not significantly affect on the THM precursors content, while the highest reduction in PFHAA (35%)&nbsp; was&nbsp; achieved&nbsp; at&nbsp; a&nbsp; dose&nbsp; of&nbsp; 3.0&nbsp; mg&nbsp; H2O2/mg&nbsp; DOC&nbsp; and&nbsp; 600&nbsp; mJ/cm 2 .&nbsp; The&nbsp; H 2O2 /UV process&nbsp; led&nbsp; to&nbsp; a&nbsp; decrease&nbsp; in&nbsp; PFTHM&nbsp; in&nbsp; the&nbsp; Temerin&nbsp; water&nbsp; by&nbsp; 74%&nbsp; at&nbsp; a&nbsp; dose&nbsp; of 3.0 mg&nbsp; 2O2 /mg&nbsp; DOC&nbsp; and&nbsp; 600&nbsp; mJ/cm 2 ,&nbsp; whereas&nbsp; the&nbsp; treatment&nbsp; applied&nbsp; had&nbsp; no&nbsp; significant effect on PFHAA. HKs precursors were detected in synthetic matrix and the Temerin water at low&nbsp; concentrations.&nbsp; In&nbsp; the&nbsp; water&nbsp; after&nbsp; the&nbsp; AOP&nbsp; at&nbsp; a&nbsp; dose&nbsp; of&nbsp; 3.0&nbsp; mg&nbsp; H 2O2 /mg&nbsp; DOC&nbsp; of hydrogen&nbsp; peroxide,&nbsp; HANs&nbsp; and&nbsp; chloropicrin&nbsp; were&nbsp; formed.&nbsp; The&nbsp; applied&nbsp; treatment&nbsp; led&nbsp; to&nbsp; the formation of brominated DBPs.All the results obtained during the research indicate the necessity of optimization&nbsp; the process&nbsp; in&nbsp; the&nbsp; treatment&nbsp; of&nbsp; the&nbsp; examined&nbsp; water&nbsp; matrices&nbsp; and&nbsp; determination&nbsp; of&nbsp; the&nbsp; optimal process taking into account the characteristics of&nbsp; raw water and the efficiency to be achieved. By combining two or more conventional treatments and optimizing the reaction conditions, high&nbsp; NOM removal efficiency can be achieved, as well as removal of the&nbsp; targeted&nbsp; precursor material&nbsp; of&nbsp; the&nbsp; selected&nbsp; DBPs,&nbsp; but&nbsp; the&nbsp; treatment&nbsp; of&nbsp; ozone&nbsp; water&nbsp; at&nbsp; a&nbsp; dose&nbsp; of 1.0 mg O3 /mg DOC was proved to be an optimal process.