Results 131 to 140 of about 2,581 (174)

NDMA Formation in Water and Wastewater

Journal AWWA, 2001
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.
Issam Najm, R. Rhodes Trussell
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The Review of NDMA Removal in Aqueous Solution

Applied Mechanics and Materials, 2013
The paper is an overview of some new issues that are connected with the removal of N-Nitrosodimethylamine (NDMA) by some water technology. NDMA is the most frequently detected member of extremely carcinogens, the N-nitrosamines. In this paper, the recent new methods for removing NDMA are introduced and proposed the future direction of the research ...
null Bayiermingda, Cong Li, Zhang Yan
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NDMA reduction mechanism of UDMH by O3/PMS technology

Science of The Total Environment, 2022
Carcinogenic N, N-Dimethylnitrosamine (NDMA) has been reported to generate significantly during ozonation of fuel additive unsymmetrical dimethylhydrazine (UDMH), the combined ozone/Peroxy-Monosulfate (O3/PMS) technology was tried for reducing its formation in this study.
Yongjun, Huang, Zixiang, He, Xiaobin, Liao, Yusheng, Cheng, Huan, Qi   +4 more
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NDMA is now found in Zantac

C&EN Global Enterprise, 2019
The US Food and Drug Administration is investigating discovery of the contaminant N-nitrosodimethylamine (NDMA) in Sanofi’s heartburn drug Zantac, as well as in some generic forms of the drug, known as ranitidine. NDMA, which is classified as a probable human carcinogen, is the same contaminant discovered last year in generic versions of the ...
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Treatment of Specific NDMA Precursors by Biofiltration

Journal AWWA, 2017
Removal of targeted N‐nitrosodimethylamine (NDMA) precursors during non‐optimized biofiltration of tertiary‐filtered wastewater was investigated. The study evaluated removal for one spiked model chloramine‐reactive precursor—i.e., ranitidine (RAN)—and three spiked model ozone‐reactive precursors—i.e., daminozide (DMZ), 1,1,1’,1’‐tetramethyl‐4,4 ...
Erica J. Marti, Eric R.V. Dickenson, Rebecca A. Trenholm, Jacimaria R. Batista   +3 more
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Occupational exposure to NDMA and NMor in the European rubber industry

Journal of Environmental Monitoring, 2007
Many nitrosamines are suspected of being human carcinogens, with the highest concentrations in the environment being measured in the rubber industry. Time trends of personal exposure to N-nitrosodimethylamine (NDMA) and to N-nitrosomorpholine (NMor) during the past two decades in the German rubber industry were analysed and compared with cross ...
de Vocht, F., Burstyn, I., Straif, K., Vermeulen, R., Jakobsson, K., Nichols, L., Peplonska, B., Taeger, D., Kromhout, H.   +8 more
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NDMA Formation After Coagulation with Ferric Chloride and Decarbonation

2015
The N-nitrosamines are a group of emerging disinfection byproducts (DBPs) that are considered as probable human carcinogens. Of all the nitrosamines, N-Nitrosodimethylamine (NDMA) has been most commonly detected in drinking water and wastewater. Particularly, the presence of NDMA is of concern in locations where wastewater effluents are used for ...
Sgroi M, ROCCARO, PAOLO, Oelker GL, Snyder SA   +3 more
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Performance Analysis of an Hybrid ARQ Adaptation of NDMA Schemes

IEEE Transactions on Communications, 2013
Traditionally, an unsuccessful packet reception, either due to channel conditions or interference from multiple sources (collisions), is discarded and followed by a new reception of the same packet. Network diversity multiple access (NDMA) handles collisions by using time diversity multipacket reception: the base station forces terminals to transmit P ...
Francisco Ganhão, Miguel P. Pereira, Luís Bernardo, Rui Dinis 0001, Rodolfo Oliveira, Paulo Pinto 0001   +5 more
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The Influence of Human Neutrophils on N-nitrosodimethylamine (NDMA) Synthesis

Immunopharmacology and Immunotoxicology, 2006
N-nitrozodimethyloamine (NDMA) is a carcinogenic compound that can be formed in vivo. NDMA is synthesized from precursors-amines and nitrosating agents. Nitrosating agents are formed through the reaction of oxide, reactive oxygen species and nitric oxide (NO).
Jakub, Jabłoński, Ewa, Jabłońska, Jolanta, Iwanowska, Magda, Marcińczyk, Janina, Moniuszko-Jakoniuk   +4 more
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Veterinary antibiotics used in animal agriculture as NDMA precursors

Chemosphere, 2016
The formation of carcinogenic N-nitrosodimethylamine (NDMA) during chloramination at drinking water treatment plants has raised concerns as more plants have switched from chlorine to chloramine disinfection. In this study, a source of NDMA precursors that has yet to be investigated was examined.
Shannon L. Leavey-Roback, Stuart W. Krasner, Irwin (Mel) H. Suffet   +2 more
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