• Journal of Korean Society of Environmental Engineers
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• v.34 no.10
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• pp.709-714
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• 2012

This study accessed the adsorption characteristics of the nine nitrosamine species on coal-based granular activated carbon (GAC). The breakthrough appeared first for NDMA and sequentially for NMOR, NPYR, NMEA, NDPA, NDEA, and NPIP. On the other hand, NDBA and NDPHA were not detected in the treated effluent for the operation period. The maximum adsorption capacity (X/M) for the seven nitrosamine species with apparent breakthrough points ranged from $27.5{\mu}g/g$ (for NDMA) to $671.0{\mu}g/g$ (for NPIP). Carbon usage rate (CUR) for NDMA was 1.07 g/day, 13.4 times higher than that for NPIP (0.08 g/day). The X/M values for the seven nitrosamine species were fitted well with a linear regression ($r^2$ = 0.94) by their octanol-water partitioning coefficient ($K_{ow}$).

• Journal of Korean Society of Environmental Engineers
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• v.36 no.1
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• pp.49-57
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• 2014

The survey of nitrosamine occurrence at Nakdong river is conducted in this study. According to the study results, six nitrosamine compounds (NDEA as N-nitrosodiethylamine, NDPA as N-Nitrosodi-n-propylamine, NDMA as N-nitrosodimethylamine, NMEA as N-nitrosomethylethylamine, NDBA as N-nitrosodi-n-butylamine, and NDPHA as N-Nitrosodiphenylamine) were detected at the Nakdong river. Among these, NDEA and NDPA are the most important compounds in terms of the nitrosamine contamination of Nakdong river. The detected concentration of NDEA exceeded the CDHCS (California Department of Health Care Services) response level of 100 ng/L at several sites. The detected concentration of NDPA approached the response level (500 ng/L) at few sites. When all nitrosamine concentrations were summed up, the maximum concentration of 735.7 ng/L was detected at the Nakdong river.