Effect of disinfection processes and anthropogenic pollutants on comparative formation of trihalomethanes and N-nitrosodimethylamine

N. H. Orak, T. Ozsenturk, E. Topuz, E. Aydin, M. Gurel, E. A. Genceli, E. Pehlivanoglu-Mantas*

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3 Atıf (Scopus)

Özet

Chloramination and chlorination contribute to the formation of N-nitrosodimethylamine and trihalomethanes, respectively, both of which are defined as disinfection by-products. To be able to select the most appropriate water treatment scheme, it is important to comparatively evaluate the formation of both of these disinfection by-products during the application of different disinfection methods. In this study, chlorination, chloramination and stepwise chloramination methods have been applied to surface water samples that have been spiked with known N-nitrosodimethylamine precursors. Experimental results showed that ranitidine can be an effective N-nitrosodimethylamine precursor in distilled water, when chloraminated with high concentrations (140 mg/L) for a long time (10 days), resulting in approximately 450 ng/L of N-nitrosodimethylamine. However, neither dimethylamine nor ranitidine leads to significant trihalomethanes or N-nitrosodimethylamine formation in lake water when chloramination is conducted with low concentration (2 mg/L) for 2 h. These results suggest that N-nitrosodimethylamine concentration measured in the effluent of the drinking water treatment plant may underestimate the N-nitrosodimethylamine concentration that will reach the consumers since chloramination reactions will continue in the distribution system. On the other hand, when only N-nitrosodimethylamine formation potential is used, it will overestimate the N-nitrosodimethylamine that might form in the distribution system due to high disinfectant concentration, high contact time and adjusted pH values used in the N-nitrosodimethylamine formation potential test.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)4083-4090
Sayfa sayısı8
DergiInternational Journal of Environmental Science and Technology
Hacim16
Basın numarası8
DOI'lar
Yayın durumuYayınlandı - 1 Ağu 2019

Bibliyografik not

Publisher Copyright:
© 2019, Islamic Azad University (IAU).

Finansman

This work was funded by the Scientific and Technological Research Council of Turkey (TUBITAK, Project # 108Y311) and ITU Research Fund Project # 34981. This work was funded by the Scientific and Technological Research Council of Turkey (TUBITAK, Project # 108Y311) and ITU Research Fund Project # 34981.

FinansörlerFinansör numarası
ITU Research Fund Project
TUBITAK108Y311
International Technological University34981
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

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