A rapid and reliable technique for N -nitrosodimethylamine analysis in reclaimed water by HPLC-photochemical reaction-chemiluminescence

Fujioka, Takahiro; Takeuchi, Haruka; Tanaka, Hiroaki; Nghiem, Long D.; Ishida, Kenneth P.; Kodamatani, Hitoshi

doi:10.1016/j.chemosphere.2016.06.094

Cited by 26 publications

(17 citation statements)

References 24 publications

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“…There is no uniform standard method, which can quickly and accurately determine ng/L concentration NDMA. The existing methods can only rely on new instruments or related accessories to achieve the accuracy of detection [133][134][135][136][137]. The operation is complicated and not cost-effective.…”

Section: Monitoring Methodsmentioning

confidence: 99%

Occurrence and control of N-nitrosodimethylamine in water engineering systems

Bian

Wang

Zhu

et al. 2018

Environmental Engineering Research

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N-nitrosodimethylamine (NDMA) is a typical nitrogen disinfection by-product, which has posed a potential threat to human health during drinking water disinfection. Because of the well-known effects of mutagenesis, carcinogenesis and teratogenesis, the high detection rate in water engineering systems (such as coagulation, membrane filtration and biological systems), and difficulty to remove, it has received wide concern in the field of water engineering systems. The NDMA is a low molecular weight hydrophilic organic substance, which is difficult to remove. Also, the mechanism for NDMA formation is also recognized to be complex, and many steps still needed to be further evaluated. Therefore, the mechanistic knowledge on NDMA formation potential and their removal processes is of particularly interest. Few papers summarize the occurrence and control of NDMA in water engineering systems. It is for this reason that the content of this paper is particularly important for us to understand and control the amount of NDMA thus reducing the threat of disinfection by-products to drinking water. Four parts including the mechanisms for the NDMA formation potential, the factors affecting the NDMA formation potential, the technologies for removal of NDMA are summarized. Finally, some definite suggestions are given.

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Section: Monitoring Methodsmentioning

confidence: 99%

Occurrence and control of N-nitrosodimethylamine in water engineering systems

Bian

Wang

Zhu

et al. 2018

Environmental Engineering Research

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“…Concentrations of NDMA were analyzed and determined using a high-performance liquid chromatography-inline anion exchange reaction-photochemical reaction-chemiluminescence (HPLC-AEM-PR-CL) [38,39]. The description below was adopted from [40] for a concise explanation of the applied analytical technique:…”

Section: Ndma Analysismentioning

confidence: 99%

N-Nitrosodimethylamine Formation from Treatment of Seasonally and Spatially Varying Source Water

Meadows

Pradhanang

Fujioka

et al. 2019

Water

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N-nitrosodimethylamine (NDMA) is a disinfection by-product (DBP) that has been classified as a probable human carcinogen in multiple risk assessments. NDMA presence in drinking water is widespread and dependent on source water, disinfectant type, precursors, and water treatment strategies. The objectives of this study were to investigate NDMA formation potential in a modeled monochloramine water treatment plant (WTP) fed by seasonally and spatially varying source water; and to optimize DBP precursor removal by combining conventional and additional treatment techniques. After NDMA analysis, it was found that NDMA formation was significantly dependent on source water type and monochloramine contact time (CT); e.g., at 24 h CT, Cork Brook produced 12.2 ng/L NDMA and Bailey Brook produced 4.2 ng/L NDMA, compared with 72 h CT, Cork Brook produced 4.1 ng/L NDMA and Bailey Brook produced 3.4 ng/L NDMA. No correlations were found between traditional DBP precursors such as total organic carbon and total nitrogen, and the formation of NDMA. The laboratory bench-top treatment system was highly effective at removing traditional DBP precursors, highlighting the need for WTPs to alter their current treatment methods to best accommodate the complex system of DBP control.

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“…Prior studies have demonstrated the accuracy of the HPLC-PR-CL method for NDMA analysis in waters. 18,19 In the present study, an online adaptation of the instrument was 154 validated for UF-treated wastewater. The sampling system consisted of a 200 mL beaker 155 holding UF-treated wastewater, a magnetic stirrer, a peristaltic pump and 6 mm i.d.…”

Section: Validation Protocolmentioning

confidence: 99%

“…HPLC-PR-CL for NDMA analysis has been validated in prior work including comparison with a conventional method (solid phase extraction followed by GC-MS/MS) and evaluation of interference by common process chemicals (monochloramine, hydrogen peroxide and hypochlorite) and organic compounds in treated wastewaters. 18 Among the process chemicals, 93 only hypochlorite interfered with NDMA analysis but the interference was eliminated by 94 dosing a reducing agent, which is a standard procedure for NDMA analysis to prevent 95 NDMA formation in the sample bottle prior to analysis. Interference from organic 96 constituents in secondary and ultrafiltration (UF)-treated wastewaters was also avoided by 97 reducing the sample injection volume, while no interference was identified with RO 98 permeate.…”

Section: Introductionmentioning

confidence: 99%

“…Interference from organic 96 constituents in secondary and ultrafiltration (UF)-treated wastewaters was also avoided by 97 reducing the sample injection volume, while no interference was identified with RO 98 permeate. 18 In the prior work the analytical technique was developed for laboratory use with a manual or autosampler-assisted injection of manually collected samples using a bench top HPLC-PR-CL instrument.…”

Section: Introductionmentioning

confidence: 99%

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