geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

NDMA formation in water and wastewater


, : NDMA formation in water and wastewater. American Water Works Association Journal 93(2): 92-99, February

N-nitrosodimethylamine (NDMA) is a carcinogen known to be present in various foods and industrial products. The US Environmental Protection Agency has established a 10-6 cancer risk level for NDMA of 0.7 ng/L. NDMA has been found in the effluents of various water and wastewater plants, but its formation mechanism is not yet understood. This study evaluated NDMA formation during various water and wastewater treatment processes including chlorination and chloramination, ozonation, and ion exchange. On the basis of the limited results obtained in this study, NDMA appears to be a by-product of the chloramination of water and wastewater, with the level of NDMA formed directly related to the chloramine dose. In the waters tested, NDMA did not form on contact with free chlorine or ozone. Contact of one water with typical levels of amine-based polymer did not form any measurable NDMA levels (<2 ng/L). Batch testing was conducted with four strong-base anion exchange resins contacted with untreated groundwater and with buffered deionized water. Results showed that some resins might leach or form NDMA and the level of NDMA produced is a function of the chemical functional group on the surface of the resin.

US$29.90


Other references

McNally, S.; Overend, W.G., 1966: The chromatographic differentiation of some deoxy-sugars. Journal of Chromatography 21(1): 160-162

Schnatz, P.F.; Nudy, M.; Shively, C.A.; Powell, A.; O'Sullivan, D.M., 2012: A prospective analysis of the association between cardiovascular disease and depression in middle-aged women. Experimental and clinical data demonstrate a close association between depression and coronary heart disease (CHD). Because no simple depression instrument for use by general practitioners has been shown to predict CHD, the objective of this study...

Chow, P.N.ack, D., 1978: Forestry and forest products education and research in West Germany. Forest products journal: 28 (4) 14-15

Wolper, L.F.; Gans, D.N.; Peterson, T.P., 2003: Don't suffer the consequences. Prepare your office for bioterrorism response. In a low-level bioterrorism attack without mass casualties, physician offices will stand at the front line for diagnosis and treatment. Lacking preparation, those offices can suffer some of the first casualties. Physicians and their administrators...

Bailie, R.; Armstrong, R.A.; Reid, D., 2008: South African Journal of Geology. South African Journal of Geology 111.1

Perov, M.F.; Tal'drik, A.A., 1974: Amino acids of Eimeria tenella oocysts. Parazitologiia 8(4): 365-367

Corbett, J.L.; Kerr, J.H.; Prys-Roberts, C., 1969: Cardiovascular responses to aspiration of secretions from the respiratory tract in man. Journal of Physiology 201(1): 51p-52p

Pestka, S., 1969: Studies on the formation of transfer ribonucleic acid-ribosome complexes. XI. Antibiotic effects on phenylalanyl-oligonucleotide binding to ribosomes. The effect of antibiotics on the binding of phenylalanyl-oligonucleotide to ribosomes has been examined. The results show that many classes of antibiotics can interfere with binding of the aminoacyl-oligonucleotide terminus of tRNA to ribosomes: c...

Hiramatsu, Y., 1978: Interpretation of x-ray pictures. 1. Definition of x-ray. Kangogaku Zasshi 42(1): 85-88

Izneid, B.Abu.; Fadhel, M.I.; Al-Kharazi, T.; Ali, M.; Miloud, S., 2015: Design and develop a nondestructive infrared spectroscopy instrument for assessment of mango (Mangifera indica) quality. A portable infrared spectroscopy system has been designed and developed for assessment of quality of mango fruit. This paper describes the design and development of a fruit quality grading device using reflectance mode optical sensor. The experime...