| Autor: |
Mori, Masanobu1 mori@gunma-u.ac.jp, Sugita, Tsuyoshi1, Mase, Akinori1, Funatogawa, Takahiro1, Kikuchi, Masaru1, Aizawa, Kazuhiko1, Kato, Shigekazu2, Saito, Yoichi1,3, Ito, Tsukasa4, Itabashi, Hideyuki1 |
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| Zdroj: |
Chemosphere. Jan2013, Vol. 90 Issue 4, p1359-1365. 7p. |
| Abstrakt: |
Abstract: This paper reports on the photodecomposition of aqueous humic acid (HA) by a TiO2-coated ceramic foam filter (TCF) reactor and on the potential for the formation of disinfection byproducts (DBPs) upon chlorination of the photocatalytically treated solutions. This photocatalytic reactor can also be applied to the removal of natural organic matter (NOM) in swamp waters. The proposed photocatalytic reaction system was operated as per standardized methodologies. First, the ability of the TCF to decompose HA (a representative compound of NOM) was evaluated from the changes in the total organic carbon (TOC) and UV254 with the reaction time. Remarkably, TOC removal and UV254 values ranging from 44% to 61% and from 60% to 83%, respectively, were achieved. The potential for the formation of DBPs (total trihalomethane and total haloacetic acid) by chlorination of the phototreated solution was strongly dependent on the TOC removal and UV254 values in the solution. The degree of photodecomposition of NOMs in the swamp water samples and the DBP formation potential showed similar trends as in the case of the standard solutions containing HA. The method used in this study could be effectively used to evaluate the efficiency of TCF for reducing HA and NOM, while suppressing the formation of DBP products. [Copyright &y& Elsevier] |
| Databáze: |
GreenFILE |
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Full Text from ScienceDirect