Degradation of Natural Organic Matter in Water by Using UV-C/H2O2 Process

Juretić, Hrvoje and Smoljanić, Goran and Barta, Marija (2015) Degradation of Natural Organic Matter in Water by Using UV-C/H2O2 Process. = Degradation of Natural Organic Matter in Water by Using UV-C/H2O2 Process. The Holistic Approach to Environment, 5 (3). pp. 135-149. ISSN 1848-0071. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. . Točan broj autora: 3.

Preview

Text Degradation of Natural Organic Matter in Water by Using UV-CH2O2 Process.pdf - Published Version Jezik dokumenta:English Download (897kB) | Preview

Abstract (Croatian)

Cilj ovog rada bio je istražiti primjenljivost izravne fotolize, vodikovog peroksida i UV-C/H2O2 napredne oksidacije na razgradnju prirodnih organskih tvari u sirovoj bunarskoj vodi koju karakterizira visoki alkalitet i povišeni sadržaj otopljenog organskog ugljika (DOC). Učinkovitost obrade vrednovala se u pogledu smanjenja koncentracije DOC-a i UV apsorbancije pri 254 nm (A254). Primjenom izravne UV fotolize kao i oksidacije vodikovim peroksidom nije se postiglo smanjenje sadržaja DOC-a, ali se zato brzina smanjenja DOC-a znatno povećala pri oksidaciji uz istovremenu prisutnost vodikova peroksida i UV zračenja. Primjenom optimalne doze vodikova peroksida od 500 mg L-1 , UV-C/H2O2 postupkom ostvarilo se smanjenje A254 od približno 92% i uklanjanje više od 83% početnog sadržaja DOC-a. Prisutnost hidrogenkarbonatnih i karbonatnih iona u vodi djeluje inhibitorno na postupak razgradnje.

Abstract

This laboratory study evaluated the ultraviolet (UV) photolysis, H2O2 treatment and UV-C/H2O2 advanced oxidation for the degradation of natural organic matter (NOM) in raw groundwater having high alkalinity and elevated dissolved organic carbon (DOC) concentration. The treatment efficiency was evaluated in terms of the reduction of DOC and UV absorbance at 254 nm (A254). UV photolysis and H2O2 oxidation as standalone treatments were not effective at reducing DOC but the rate of DOC reduction increased markedly when H2O2 was combined with UV-C radiation. At the optimal H2O2 dose of 500 mg L-1, UV-C/ H2O2 treatment resulted in approximately 92% A254 removal and more than 83% DOC removal. Hydrogen carbonate and carbonate ions inhibited the degradation process.

Item Type:	Article (["eprint_fieldopt_article_type_article" not defined])
Uncontrolled Keywords:	prirodne organske tvari, UV fotoliza, UV-C/H2O2 postupak
Keywords (Croatian):	natural organic matter, UV photolysis, UV-C/H2O2 treatment
Subjects:	TECHNICAL SCIENCE > Mechanical Engineering
Divisions:	500 Department of Energy, Power Engineering and Environment > 540 Chair of Water and Environmental Engineering
Indexed in Web of Science:	No
Indexed in Current Contents:	No
Date Deposited:	14 Apr 2016 10:23
Last Modified:	20 Sep 2017 07:30
URI:	http://repozitorij.fsb.hr/id/eprint/5623

Actions (login required)

View Item