PMID: 18200857Jan 19, 2008Paper

The impact of UV/H2O2 advanced oxidation on molecular size distribution of chromophoric natural organic matter

Environmental Science & Technology
Siva R Sarathy, Madjid Mohseni

Abstract

The impact of hydroxyl radical (*OH) on the molecular weight distribution of natural organic matter (NOM) was investigated. *OH was generated via the photolysis of hydrogen peroxide (H2O2) by ultraviolet (UV) radiation of 254 nm, also known as UV/ H2O2 advanced oxidation (AO). Additionally, the impact of combined membrane and UV/H2O2 treatment on the molecular weight distribution of NOM was studied. High performance size exclusion chromatography (HPSEC) was used to determine the apparent molecular weight (AMW) distribution of chromophoric NOM (CNOM). Prior to AO, 33% of the CNOM in the water had AMW greater than 1400 Da. Meanwhile, lower AMW CNOM made up smaller amounts of the CNOM, with CNOM of AMW less than 450 Da making up 5% of the total. Under the AO conditions typically applied in drinking water treatment applications, NOM was not mineralized but was partially oxidized resulting in significant reduction in aromaticity. *OH preferentially reacted with higher AMW CNOM and the fragmentation of high AMW CNOM led to the formation of smaller AMW CNOM. Ultrafiltration removed all CNOM greater than 1400 Da AMW and a large portion of other high AMW fractions. In the absence of high AMW CNOM, *OH reacted more readily with all AMW f...Continue Reading

Citations

Jan 24, 2014·Water Research·Kerry E Black, Pierre R Bérubé
Jun 18, 2014·Journal of Hazardous Materials·Shubhajit SarkarMadhumita B Ray
May 18, 2010·Water Research·Aaron D DotsonKarl G Linden
Jul 16, 2013·Water Research·Yuan Gao, Gregory Korshin
Oct 12, 2010·Water Research·D H MetzD D Dionysiou
Dec 19, 2014·Environmental Technology·Hsing Yuan Yen, Li Shuang Yen
Dec 3, 2010·Journal of Hazardous Materials·Gustavo Imoberdorf, Madjid Mohseni
Jan 12, 2017·Environmental Science and Pollution Research International·Xin ZhongShuili Yu
Jun 22, 2017·Luminescence : the Journal of Biological and Chemical Luminescence·Pengfei XieJiahai Ma
Feb 11, 2010·Journal of Peptide Science : an Official Publication of the European Peptide Society·Wansong ZongYanmin Tian
Apr 12, 2013·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Mohammad Mahdi Bazri, Madjid Mohseni
Apr 11, 2018·Scientific Reports·Hoda Fakour, Shang-Lien Lo
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Sep 20, 2008·Environmental Science & Technology·Christopher W K ChowMary Drikast
May 18, 2010·The Science of the Total Environment·Seok-Young OhPei C Chiu

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