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https://open.uns.ac.rs/handle/123456789/15472
Nаziv: | Effects of ozonation and catalytic ozonation on the removal of natural organic matter from groundwater | Аutоri: | Molnar J. Agbaba, Jasmina Dalmacija, Božo Klašnja M. Watson, Malcolm Kragulj M. |
Dаtum izdаvаnjа: | 1-јул-2012 | Čаsоpis: | Journal of Environmental Engineering (United States) | Sažetak: | This paper presents a comparison of the effects of ozonation [0.4-3.0 mg ozone (O3)/mg (DOC)] and titanium dioxide-catalyzed ozonation (TiO2-O3) (0.4-3.0 mg O3/mg DOC; 1.0 mg TiO2/L) at pH 7.46 on the removal of natural organic matter (NOM) from groundwater from the central Banat region (northern Serbia). This groundwater is rich in NOM (9.85-mg/L DOC), which is mostly of hydrophobic character (65% fulvic acid, 14% humic acid fraction). Ozonation and TiO2-O3 resulted in almost identical degrees of DOC content reduction (up to 30%), with the maximum efficacy of both processes achieved with 3.0 mg O3/mg DOC. The application of oxidation treatments resulted in complete humic acid oxidation, and increased the content of the hydrophilic fraction (up to 72%). The use of TiO2-O3 did not result in an improvement in the removal of trihalomethane precursors in comparison with ozonation (up to 48%) but produced less brominated species, whereas use of the TiO2-O3 process resulted in better removal of haloacetonitrile precursors (up to 44% removal) than did ozonation, which had less effect. © 2012 American Society of Civil Engineers. | URI: | https://open.uns.ac.rs/handle/123456789/15472 | ISSN: | 07339372 | DOI: | 10.1061/(ASCE)EE.1943-7870.0000525 |
Nаlаzi sе u kоlеkciјаmа: | PMF Publikacije/Publications |
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