Abstract

1. Abstract
Some N-nitrosamines (NAs) have been identified as emerging disinfection by-products during water treatment. In this study, the levels of NAs namely (NDMA, N-nitrosomethylethylamine [NMEA], NDEA, Nnitrosodi-n-propylamine [NDPA] and N-nitrosodi-n-butylamine [NDBA] were measured. With coagulation/ sedmentation 29% removals were detected for the N as mentioned above. Activated Carbon (AC) adsorption removed over 40% of the non-polar NDMA and NDEA fractions. Bio-treatment removed 97-999% of the cationic fraction NAs studied. With aerobic biological treatment 99% NDMA, N-nitrosomethylethylamine [NMEA], NDEA, Nnitrosodi-n-propylamine [NDPA] ana N-nitrosodi-n-butylamine [NDBA] yields were detected from the surface water in Ä°zmir
2. Introduction
Some N-nitrosamines (NAs) have been identified as emerging disinfection by-products during water treatment. Some N-nitrosoamines (NAs) have been identified as emerging disinfection by-products (DBPs) in drinking water [13]. NAs present much higher carcinogenicity than the traditional carbonaceous DBPs, such as trihalomethanes (THMs) and haloacetic acids (HAAs) [1, 3, 11]. The studies showed that N-nitrosamines (NAs) have various sources, including secondary amines [2, 6, 8, 10], certain water treatment polymers [13, 15], certain pharmaceutical and personal care products (PPCPs) [4, 5], certain pesticides or their degradation products [15, 16], wastewater treatment plant effluent organic matter (EfOM) (Mitch and Sedlak, 2004; Wang et al., 2014), certain industrial chemicals [12, 14], algal organic matter [19] and natural organic matter (NOM) [3, 10]. A general conclusion can be drawn from these investigations that N-nitrosamines (NAs) generally have the dialkyamine, tertiary amine or quaternary amine functional groups [7, 13].