Oxidation of natural organic matter with processes involving O3, H2O2and UV light: formation of oxidation and disinfection by-products

Agbaba, Jasmina; Jazić, Jelena Molnar; Tubić, Aleksandra; Watson, Malcolm; Maletić, Snežana; Isakovski, Marijana Kragulj; Dalmacija, Božo

doi:10.1039/c6ra18072h

Cited by 38 publications

(9 citation statements)

References 28 publications

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“…The THM precursor results at the two higher ozone doses are in agreement with Lamsal et al (2011), who achieved 75% removal of THM precursors under similar treatment conditions. These results are also comparable with our previous research, carried out in a different groundwater with greater NOM content, whereby a slight reduction (17%) in THMFP was observed after the O 3 / UV process (0.5 mg O 3 /mg DOC; 3000 mJ/cm 2 ) (Agbaba et al 2016). The HAA precursors behaved somewhat differently, with the same general trend observed at each ozone dose: addition of UV to the process has a negative impact on treatment performance, with lesser removals by the combined process with increasing UV fluence.…”

Section: Influence Of Uv Photolysis O 3 and O 3 /Uv On Dbp Formationsupporting

confidence: 92%

“…AOPs generate highly reactive and nonselective hydroxyl radicals (HO • ) which are capable, via the creation of lower molecular weight (MW) intermediates, of mineralising most organic compounds to non-toxic carbondioxide and water (Sanly et al 2007). Among the AOPs used for drinking water treatment, ozone/ultraviolet (O 3 /UV) has been shown to result in significant NOM removal and reduction of DBPs formation potential, although the changes in NOM properties during chlorination may result in the formation of other DBPs instead (Chin and Bérubé 2005;Matilainen and Sillanpää 2010;Lamsal et al 2011;Agbaba et al 2016). UV irradiation was found to successfully decrease the ozone dose required during ozonation, which in turn reduces the formation of carcinogenic bromate (Meunier et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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Fate of bromine-containing disinfection by-products precursors during ozone and ultraviolet-based advanced oxidation processes

Petronijević

Agbaba

Ražić

et al. 2018

Int. J. Environ. Sci. Technol.

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This research evaluates the effect of ultraviolet photolysis, ozonation and ozonation/ultraviolet advanced oxidation processes on different disinfection by-product precursors, during the treatment of water with low organic matter and moderate bromide contents. After different combinations of ultraviolent fluence and ozone, the formation potentials of trihalomethanes and haloacetic acids were investigated. Bromine incorporation factors were used to give specific insight into the behaviour of brominated disinfection by-products, and inorganic bromate formation was also determined. The ozone/ultraviolet process was found to be more effective in reducing the total natural organic matter content than ozonation or ultraviolet photolysis alone. Ultraviolet photolysis was more successful removing the precursors of brominated trihalomethanes than chlorinated trihalomethanes, but slightly increased the precursors of both brominated and chlorinated haloacetic acids. During ozonation, reductions in the haloacetic acid formation potential were significantly better than those of the trihalomethanes formation potential (up to 54 and 27%, respectively). In the combined ozonation/ultraviolet process, increasing the ultraviolet fluence had a varying effect on trihalomethane and haloacetic acid precursor behaviour, depending on the ozone dose applied. Bromine incorporation after ozonation alone increased to up to 38% of the total bromide, largely as a result of bromate formation. The combined process curtailed all bromate formation, but increased the bromine incorporation up to 48% at higher ozone doses, with disinfection by-product formation shifting towards the more toxic brominated species.

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Section: Influence Of Uv Photolysis O 3 and O 3 /Uv On Dbp Formationsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Fate of bromine-containing disinfection by-products precursors during ozone and ultraviolet-based advanced oxidation processes

Petronijević

Agbaba

Ražić

et al. 2018

Int. J. Environ. Sci. Technol.

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“…The use of the 150 W UV lamp allowed for an over 32% reduction of TOC concentration. A decrease of organic matter was also reported by other investigation focused on the use of UV light [16]. According to high removal degrees of most of the tested micropollutants it was expected, that the concentration of TOC also decreases by more than 50%.…”

Section: Resultssupporting

confidence: 77%

Section: Resultssupporting

confidence: 77%

Impact of the UV Lamp Power on the Formation of Swimming pool Water Treatment By-Products

Kudlek

Lempart

Dudziak

et al. 2018

Architecture, Civil Engineering, Environment

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The operation of swimming pools requires a constant monitoring of water quality parameters and protection of water against pathogens. This is implemented by various disinfection methods, among which the most commonly used are based on chlorine action supported by ozone or UV irradiation. The paper presents the comparison of the effectives of organic micropollutants decomposition occurring in swimming pool water during UV irradiation emitted by a 15 and 150 W UV lamp. The tests were conducted on real swimming pool water collected from a sport basin. The identification and the determination of micropollutants concentration were performed by the use of gas chromatography GC-MS (EI) preceded by solid-phase extraction SPE. It was shown that the concentration of micropollutants decreases with the increase in the irradiation time of pool water. The 150 W UV lamp allowed for an over 33% removal of micropollutants from the group of pharmaceuticals compounds (except for caffeine) and more than 76% decrease of other compounds, which belong to the group of personal care products additives, food additives and phthalates. In addition, it has been demonstrated that during the irradiation of such complex water matrixes as swimming pool water, a significant number of micropollutants degradation by-products were formed, which are not found in water before UV irradiation.

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“…There has also been interest in the application of H 2 O 2 /UV oxidation for source water pretreatment, which was found to enhance fouling mitigation and NOM rejection for nanofiltration (Song et al, 2004;Zhang et al, 2015), and was beneficial within an integrated MBR treatment process (Laera et al, 2012). Other studies have also reported that the use of an oxidation pre-treatment process can enhance final water quality, such as a reduction in trihalomethane and haloacetic acid formation potentials (Agbaba et al, 2016), and the use of H 2 O 2 /UVC treatment removed more than 99.9% of all added pollutants, mineralized 63% of organic compounds and achieved a complete disinfection of total coliforms (Rueda-Marquez et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Prevention of UF membrane fouling in drinking water treatment by addition of H2O2 during membrane backwashing

Graham

Liu

2019

Water Research

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Although conventional coagulation pre-treatment can mitigate the fouling of ultrafiltration (UF) membrane when treating raw waters, it is insufficient to restrict the development of irreversible fouling and reversible fouling to a low level. In this paper we demonstrate that the intermittent addition of H 2 O 2 into the membrane tank during backwash events (after coagulation pre-treatment) successfully prevented the development of any significant membrane fouling. Laboratory-scale tests were undertaken using two membrane systems operated in parallel over 60 days, one serving as a reference coagulation-ultrafiltration (CUF) process, and the other *Manuscript Click here to view linked References receiving the H 2 O 2 (CUF-H 2 O 2), with a decreasing dose in three successive phases: 10, 5 and 2 mg/L. The results showed that the addition of H 2 O 2 (via a separate dosing tube) during a 1 min backwash process (at 30 min intervals) reduced the growth of bacteria in the membrane tank, and the associated concentrations of soluble microbial products (SMP, including protein and polysaccharide). This resulted in a much reduced cake layer, which contained significantly less high MW organic matter (>50%), such as EPS, thereby improving the interaction between particles in the cake layer and/or particles and the membrane surface. There was also less organic matter, of all MW fractions, adsorbed in the membrane pores of the CUF-H 2 O 2 system. The addition of H 2 O 2 in the membrane tank appeared to alter the nature of the organic matter with a conversion of hydrophobic to hydrophilic fractions, which induced less organics adsorption within the hydrophobic PVDF membrane pores, and a reduced bonding ability for particles. There was no physico-chemical evidence of any deterioration of the membrane from exposure to H 2 O 2 , which indicates the feasibility of applying this novel method of fouling control for full-scale UF based water treatment processes.

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Oxidation of natural organic matter with processes involving O₃, H₂O₂and UV light: formation of oxidation and disinfection by-products

Abstract: This study investigates the effects of UV photolysis, ozonation and different advanced oxidation processes (O3/UV, H2O2/UV and O3/H2O2/UV) on the oxidation of groundwater natural organic matter (NOM) and by-product formation.

Cited by 38 publications

References 28 publications

Fate of bromine-containing disinfection by-products precursors during ozone and ultraviolet-based advanced oxidation processes

Fate of bromine-containing disinfection by-products precursors during ozone and ultraviolet-based advanced oxidation processes

Impact of the UV Lamp Power on the Formation of Swimming pool Water Treatment By-Products

Prevention of UF membrane fouling in drinking water treatment by addition of H2O2 during membrane backwashing

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