Challenges and opportunities for on-line monitoring of chlorine-produced oxidants in seawater using portable membrane-introduction Fourier transform-ion cyclotron resonance mass spectrometry

Roumiguières, Adrien; Bouchonnet, Stéphane; Kinani, Saïd

doi:10.1007/s00216-020-03043-3

Cited by 11 publications

(2 citation statements)

References 62 publications

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“…Chemical ionization is a "soft ionization" process that results in signi cantly less fragmentation than electron ionization commonly used with MIMS because less energy is imparted on the parent compound when it is ionized 24 . One group of researchers utilized H 3 O + as a chemical ionization source in conjunction with MIMS and found that chloramines and NH 2 Br degraded signi cantly within the membrane such that the signals for the parent compounds were weaker than those of decay products 25 ; an issue that negated the advantages of chemical ionization when used in conjunction with MIMS. PTR-ToF-MS has been used to measure chloramines in the air at indoor pools 26 and following cleaning with ammonia and chlorine-based cleaners 27 .…”

Section: Introductionmentioning

confidence: 99%

Simultaneous time-resolved inorganic haloamine measurements enable analysis of disinfectant degradation kinetics and by-product formation

Brodfuehrer,

Blomdahl,

Wahman

et al. 2024

Nat Water

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We demonstrate the rst application of Proton Transfer Time-of-Flight Mass Spectrometry (PTR-ToF-MS) for monitoring kinetics of disinfectant decay in water with 1 to 3 orders of magnitude greater sensitivity than other analytical methods. Chemical disinfection inactivates pathogens during water treatment and prevents regrowth as water is conveyed in distribution system pipes, but it also causes formation of toxic disinfection by-products (DBPs). Analytical limits have hindered kinetic models which aid in ensuring water quality and protecting public health by predicting disinfectant DBPs formation. PTR-ToF-MS, designed for measuring gas phase concentrations of organic compounds, was able to simultaneously monitor aqueous concentrations of ve haloamines relevant to chloramine disinfection under drinking water relevant concentrations. This novel application to aqueous analytes opens a new range of applications for PTR-ToF-MS.

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Section: Introductionmentioning

confidence: 99%

Simultaneous time-resolved inorganic haloamine measurements enable analysis of disinfectant degradation kinetics and by-product formation

Brodfuehrer,

Blomdahl,

Wahman

et al. 2024

Nat Water

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“…Because of its effectiveness, chlorination has been the standard practice for drinking water disinfection for over a century and is also commonly used in swimming pools and aquaculture seawater to maintain sanitary conditions. − However, in seawater chlorination, chemical species other than free chlorine may act as the dominant disinfectants due to reactions of chlorine with water constituents. Specifically, chlorine reacts immediately with bromide ion (Br – ) and ammonia (NH 3 /NH 4 + ), producing secondary oxidative species called chlorine-produced oxidants (CPOs; e.g., monochloramine (NH 2 Cl), dichloramine (NHCl 2 ), hypobromous acid (HOBr), hypobromite (OBr – ), monobromamine (NH 2 Br), dibromamine (NHBr 2 ), tribromamine (NBr 3 ), and bromochloramine (NHBrCl)). − The speciation of CPOs during chlorination can significantly affect the disinfection efficacy of chlorination.…”

Section: Introductionmentioning

confidence: 99%

Inactivation of Edwardsiella tarda and Vibrio harveyi by Chlorination in Seawater

Cho,

Kim,

Cha

et al. 2024

ACS EST Eng.

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Edwardsiella tarda (E. tarda) and Vibrio harveyi (V. harveyi), common pathogenic bacteria in fish, contribute to elevated mortality rates within fish populations. Chlorination, a widely utilized disinfection method, can effectively manage these microorganisms. The present research examined the impact of chlorination in the inactivation of two microorganisms, with varying pH, chlorine doses, natural organic matter (NOM) concentrations, and temperatures. Microbial inactivation during seawater chlorination is strongly influenced by the formation of chlorine-produced oxidants (CPOs), whose speciation was determined by pH, and concentrations of bromide ions and ammonium ions. At pH 7.1, mixed CPOs (mainly HOBr/NH x Br y /NHBrCl) were formed, while NH 2 Cl was the dominant species at pH 8.2. The higher inactivation efficacies at pH 7.1 compared with those at pH 8.2 were explained by the stronger bactericidal activities of HOBr than NH 2 Cl. Meanwhile, microbial inactivation was enhanced with increasing chlorine dose and temperature, but it was inhibited with increasing NOM concentration. For a 2 log reduction of E. tarda and V. harveyi, the required concentration−time product (Ct) values were 0.0978 and 0.1102 mg•min/L, respectively, at pH 7.1. These values rose to 0.3644 and 0.3968 mg•min/L, respectively, when the pH increased to 8.2. The Ct values determined in this study provide essential guidelines for safeguarding against microbial contaminants in seawater, thus proposing effective chlorination protocols in aquaculture.

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Brominated trihalamines in chlorinated seawaters: Quantification of tribromamine and identification of bromochloramines by Membrane Introduction Mass Spectrometry

Mensah¹,

Allard²,

Berne³

et al. 2022

Science of The Total Environment

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Challenges and opportunities for on-line monitoring of chlorine-produced oxidants in seawater using portable membrane-introduction Fourier transform-ion cyclotron resonance mass spectrometry

Cited by 11 publications

References 62 publications

Simultaneous time-resolved inorganic haloamine measurements enable analysis of disinfectant degradation kinetics and by-product formation

Simultaneous time-resolved inorganic haloamine measurements enable analysis of disinfectant degradation kinetics and by-product formation

Inactivation of Edwardsiella tarda and Vibrio harveyi by Chlorination in Seawater

Brominated trihalamines in chlorinated seawaters: Quantification of tribromamine and identification of bromochloramines by Membrane Introduction Mass Spectrometry

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