Determination of dimethylnitrosamine in air, water, and soil by thermal energy analysis: measurements in Baltimore, Md.

Fine, David H.; Rounbehler, David P.; Rounbehler, Anna; Silvergleid, Arlene; Sawîckî, Eugene; Krost, Ken; DeMarrais, Gerard A.

doi:10.1021/es60129a003

Cited by 54 publications

(31 citation statements)

References 6 publications

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“…Dimethylnitrosamine has been measured in Baltimore Harbor adjacent to a dimethylhydrazine factory, but even there the ambient concentration was only a few nanomolar and < 1.5 nM at nearby control sites (Fine et al 1977). Dimethylnitrosamine has been measured in Baltimore Harbor adjacent to a dimethylhydrazine factory, but even there the ambient concentration was only a few nanomolar and < 1.5 nM at nearby control sites (Fine et al 1977).…”

Section: Methodssupporting

confidence: 82%

Variability of nitrate concentration in nitrogen-depleted subtropical surface waters

et al. 1990

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Recent improvements in the analytical determination of nitrate and nitrite allow measurements of nanomolar concentrations in nitrogen-depleted surface waters, revealing variability not previously observable. The new methods allow direct observation of net nitrate consumption and production measured as changes in nitrate concentration over time in incubated samples of seawater. We find that nitrate concentrations in nitrogendepleted surface waters show regional differences, and sometimes diel differences. The variability in nitrate concentration reflects differences in atmospheric inputs, in physical forcing, as well as in the biological processes of nitrate uptake and nitrification. Examples are shown from the Southern California Bight (1986)(1987), the equatorial Pacific (February-March, 1988), and the eastern subtropical Atlantic (March-April, 1989).

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Section: Methodssupporting

confidence: 82%

Variability of nitrate concentration in nitrogen-depleted subtropical surface waters

et al. 1990

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“…Following extraction, NDMA is separated by capillary gas chromatography (most often with DB-5 or DB-1701 columns) followed by detection by one of several methods: thermal energy analyzers (Fine et al, 1977;Kimoto et al, 1981), chemiluminescent nitrogen detectors (Tomkins et al, 1995), and high-resolution mass spectrometers . Although these methods are still used, the most common method used for determination of low concentrations of NDMA involves the use of chemical ionization followed by tandem mass spectroscopy.…”

Section: Discussionmentioning

confidence: 99%

“…Concerns about human exposure to NDMA from industrial sources also were voiced previously. During the 1970s, NDMA was detected in the air and water adjacent to a factory near Baltimore (MD) that produced UDMH from NDMA (Shapley, 1976;Fine et al, 1977;Fine, 1978). More alarming was the detection of NDMA in the air upwind of the plant in downtown Baltimore (0.1 mg/m 3 ), and at other sites in Belle, WV (0.1 mg/m 3 ), and New York City (0.8 mg/m 3 ), areas with no known industrial sources of NDMA.…”

mentioning

confidence: 99%

N-Nitrosodimethylamine (NDMA) as a Drinking Water Contaminant: A Review

Mitch¹,

Sharp²,

Trussell³

et al. 2003

Environmental Engineering Science

594

428

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N-Nitrosodimethylamine (NDMA) is a member of a family of extremely potent carcinogens, the N-nitrosamines. Until recently, concerns about NDMA mainly focused on the presence of NDMA in food, consumer products, and polluted air. However, current concern focuses on NDMA as a drinking water contaminant resulting from reactions occurring during chlorination or via direct industrial contamination. Because of the relatively high concentrations of NDMA formed during wastewater chlorination, the intentional and unintentional reuse of municipal wastewater is a particularly important area of concern. Although ultraviolet (UV) treatment can effectively remove NDMA, there is considerable interest in the development of less expensive alternative treatment technologies. These alternative technologies include approaches for removing organic nitrogen-containing NDMA precursors prior to chlorination and the use of sunlight photolysis, and in situ bioremediation to remove NDMA and its precursors.

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“…[57] The other DBP of considerable environmental concern is N-nitrosodimethylamine (NDMA), which has been found in air, beverage and food products as well as in water. [58][59][60][61][62] NDMA has been found in greater amounts than the established limits in treated drinking water and wastewater. [63,64] NDMA concentrations in various parts of the world are presented in Table 2.…”

Section: Introductionmentioning

confidence: 99%

Formation and toxicity of brominated disinfection byproducts during chlorination and chloramination of water: A review

Sharma

Zbořil

McDonald

2013

Journal of Environmental Science and Health, Part B

131

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Disinfection byproducts (DBPs) in drinking water exhibit considerable adverse health effects; recent focus is on the brominated disinfection byproducts (Br-DBPs). The chlorination and chloramination of bromide ion containing water produce reactive bromo species, which subsequently react with natural organic matter (NOM) to yield Br-DBPs. The possible reactions involved in generating DBPs are presented. Identified Br-DBPs include bromomethanes, bromoacetic acid, bromoacetamides, bromoacetonitriles, and bromophenols. Mixed chloro- and bromo-species have also been identified. Pathways of the formation of Br-DBPs have been described. The concentration of Br- ion, pH, reaction time, and the presence of Cu(II) influence the yield of DBPs. The effects of water conditions on the production of Br-DBPs are presented. The epidemiological studies to understand the potential toxic effects of DBPs including Br-DBPs are summarized. Brominated DBPs may have higher health risks than their corresponding chlorinated DBPs. A potential role of an emerging alternate disinfectant, ferrate (FeV)O(2-)4), in minimizing DBPs is briefly discussed.

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Determination of dimethylnitrosamine in air, water, and soil by thermal energy analysis: measurements in Baltimore, Md.

Cited by 54 publications

References 6 publications

Variability of nitrate concentration in nitrogen-depleted subtropical surface waters

Variability of nitrate concentration in nitrogen-depleted subtropical surface waters

N-Nitrosodimethylamine (NDMA) as a Drinking Water Contaminant: A Review

Formation and toxicity of brominated disinfection byproducts during chlorination and chloramination of water: A review

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