4.7 Article

Control of N-nitrosodimethylamine (NDMA) formation from N,N-dimethylhydrazine compounds by ozone-based advanced oxidation processes

Related references

Note: Only part of the references are listed.
Article Environmental Sciences

NDMA reduction mechanism of UDMH by O3/PMS technology

Yongjun Huang et al.

Summary: In this study, the O-3/PMS technology was effective in reducing the formation of the carcinogen NDMA during ozonation of UDMH. Increasing pH levels led to higher NDMA reduction rates, while the presence of humic acid helped decrease NDMA formation.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

Article Engineering, Environmental

N-nitrosodimethylamine formation during oxidation of N, N-dimethylhydrazine compounds by peroxymonosulfate: Kinetics, reactive species, mechanism and influencing factors

Linlu Shen et al.

Summary: This study found that peroxymonosulfate (PMS) oxidation without activation has the potential to generate the suspected human carcinogen N-nitrosodimethylamine (NDMA) in water containing N,N-dimethylhydrazine compounds. The degradation of 1,1,1',1'-tetramethyl-4,4'-(methylene-di-p-phenylene) disemicarbazide (TMDS), a representative compound, and the formation of NDMA were investigated and linked to direct PMS oxidation and singlet oxygen (O-1(2)) oxidation. The results highlight the importance of considering the formation of harmful by-products in assessing the feasibility of PMS oxidation.

JOURNAL OF HAZARDOUS MATERIALS (2022)

Review Environmental Sciences

Formation mechanism and control strategies of yN-nitrosodimethylamine (NDMA) formation during ozonation

Yang Song et al.

Summary: This review summarizes the major findings regarding the formation of N-nitrosodimethylamine (NDMA) during ozonation, a highly toxic and carcinogenic disinfection by-product. It evaluates the reaction kinetics, chemical yields, and mechanisms of potential precursors, as well as proposes strategies for controlling NDMA formation through improved ozonation processes.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

Article Environmental Sciences

NDMA formation during ozonation of metformin: Roles of ozone and hydroxyl radicals

Xiaobin Liao et al.

Summary: This study revealed that metformin can directly form NDMA during ozonation, with the addition of ·OH scavenger enhancing its formation significantly. The impacts of bromide and HCO3- on NDMA formation by O3 and ·OH were different, the increase in pH promoted NDMA production.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

Validation of the promotion mechanism between bromide and UDMH to form NDMA during ozonation

Menglan Gao et al.

Summary: This study found that bromide ions (Br-) promoted the formation of carcinogenic nitroso-dimethylamine (NDMA) during ozonation of unsymmetrical dimethylhydrazine (UDMH). The formation rate constant of NDMA with Br was over 7 times higher than without Br. Additionally, increasing bromide and ozone dosages facilitated NDMA formation, while different effects were observed with the addition of bicarbonate (HCO3-) and sulfate (SO42-).

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Engineering, Environmental

Carcinogenic risk of N-Nitrosamines in Shanghai Drinking Water: Indications for the Use of Ozone Pretreatment

Zhiyuan Chen et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2019)

Article Engineering, Environmental

N-Nitrosodimethylamine (NDMA) Degradation by the Ultraviolet/Peroxodisulfate Process

Inmaculada Velo-Gala et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS (2019)

Review Environmental Sciences

Degradation of N-Nitrosodimethylamine by UV-Based Advanced Oxidation Processes for Potable Reuse: a Short Review

Takahiro Fujioka et al.

CURRENT POLLUTION REPORTS (2017)

Review Engineering, Environmental

Formation, precursors, control, and occurrence of nitrosamines in drinking water: A review

Stuart W. Krasner et al.

WATER RESEARCH (2013)

Article Engineering, Environmental

The influence of the pre-oxidation of natural organic matter on the formation of N-nitrosodimethylamine (NDMA)

Zhuo Chen et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2008)

Article Engineering, Environmental

Occurrence of N-nitrosamines in Alberta public drinking-water distribution systems

Jeffrey W. A. Charrois et al.

JOURNAL OF ENVIRONMENTAL ENGINEERING AND SCIENCE (2007)

Article Engineering, Environmental

Phenols and amine induced HO• generation during the initial phase of natural water ozonation

MO Buffle et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2006)

Review Engineering, Environmental

N-nitrosodimethylamine (NDMA) as a drinking water contaminant:: A review

WA Mitch et al.

ENVIRONMENTAL ENGINEERING SCIENCE (2003)

Article Engineering, Environmental

Precursors of N-mitrosodimethylamine in natural waters

AC Gerecke et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2003)

Article Engineering, Environmental

Formation of N-nitrosodimethylamine (NDMA) from dimethylamine during chlorination

WA Mitch et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2002)