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

Fujioka, Takahiro; Masaki, Shunya; Kodamatani, Hitoshi; Ikehata, Keisuke

doi:10.1007/s40726-017-0052-x

Cited by 19 publications

(6 citation statements)

References 77 publications

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“…The addition of H 2 O 2 as a source of reactive radicals during the UV process is one of the most commonly applied advanced oxidation processes (AOPs), yet addition of H 2 O 2 changed the NDMA degradation efficiency only marginally as the generated hydroxyl radicals ( • OH) are scavenged to a large extent by the H 2 O 2 itself. , The UV/S 2 O 8 2– process is mainly based on the formation of sulfate radical (SO 4 •– ), which could be even more reactive than • OH at circumneutral pH [ E 0 (SO 4 •– ) = 2.50–3.10 V, and E 0 ( • OH) = 1.89 V]. − Most importantly, in the case of the UV/S 2 O 8 2– process, the generated sulfate radicals react slower with the peroxodisulfate ion than • OH with H 2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

“…16 The addition of H 2 O 2 as a source of reactive radicals during the UV process is one of the most commonly applied advanced oxidation processes (AOPs), yet addition of H 2 O 2 changed the NDMA degradation efficiency only marginally as the generated hydroxyl radicals ( • OH) are scavenged to a large extent by the H 2 O 2 itself. 16,18 The UV/S 2 O 8 2− process is mainly based on the formation of sulfate radical (SO 4…”

Section: ■ Introductionmentioning

confidence: 99%

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

Velo-Gala

Farré

Radjenović

et al. 2019

Environ. Sci. Technol. Lett.

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This study investigates the photodegradation kinetics of N-nitrosodimethylamine (NDMA) by the ultraviolet (UV)/S 2 O 8 2− process initiated by a medium-pressure mercury lamp in a collimated beam setup. Experiments were carried out to characterize the kinetics in the absence and presence of bicarbonate, chloride, and sulfate. The kinetic behavior adjusted well to first-order dependence, and the addition of 33.6 μM S 2 O 8 2− increased the NDMA removal rate by 3−4 times compared to direct photolysis leading to a reduction of 1 order of magnitude for every 8.2 × 10 3 J m −2 of fluence. In the range investigated, the reaction rate increased linearly with peroxodisulfate concentration. The presence of inorganic carbon and chloride can negatively affect the efficiency of both the UV/S 2 O 8 2− process and the conventional UV/ H 2 O 2 process, yet given that the reaction rate constants of Cl − and HCO 3 − with the • OH radical are 1 and 3 orders of magnitude higher, respectively, than with SO 4•− , their scavenging effect is less pronounced in the UV/S 2 O 8 2− process. In conclusion, the UV/S 2 O 8 2− process efficiently removes NDMA from water even containing a low concentration of HCO 3 − and Cl − anions such as reverse osmosis permeates.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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

Velo-Gala

Farré

Radjenović

et al. 2019

Environ. Sci. Technol. Lett.

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“…It is well-known that NDMA is directly photolyzed with UV irradiation. − An additional study is needed to verify the degradation of NDMA by the photobiological treatment with non-UV emitting LED bulbs. Owing to the significant public health implications of NDMA and the difficulty of its removal by RO, , the demonstration of extensive removal of NDMA by photobiological treatment would reduce the concentration in the secondary RO permeate, which in turn would lessen the burden on the subsequent photolytic processes, such as UV and UV-based advanced oxidation in the AWPFs.…”

Section: Resultsmentioning

confidence: 99%

Water Recovery from Advanced Water Purification Facility Reverse Osmosis Concentrate by Photobiological Treatment Followed by Secondary Reverse Osmosis

Ikehata

Zhao

Kulkarni

et al. 2018

Environ. Sci. Technol.

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Reverse osmosis (RO)-based desalination and advanced water purification facilities have inherent challenges associated with concentrate management and disposal. Although enhanced permeate recovery and concentrate minimization are desired, membrane scaling due to inorganic constituents, such as silica, calcium, phosphate, and iron, hinders the process. To solve this problem, a new diatom-based photobiological process has been developed to remove these scaling constituents by biological uptake and precipitation. In this study, RO concentrate samples were collected from a full-scale advanced water reclamation facility in California and were treated in 3.8 and 57 L photobioreactors inoculated with a brackish water diatom Pseudostaurosira trainorii PEWL001 using light-emitting diode bulbs or natural sunlight as a light source. The photobiological treatment removed 95% of reactive silica and 64% of calcium and enabled additional water recovery using a secondary RO at a recovery rate up to 66%. This represents 95% overall recovery, including 85% recovery in the primary RO unit. In addition to the scaling constituents, the photobiological treatment removed 12 pharmaceuticals and personal care products, as well as N-nitrosodimethylamine, from RO concentrate samples primarily via photolysis. This novel approach has a strong potential for application to brackish water desalination and advanced water purification in arid and semiarid areas.

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“…In recent decades, significant improvements have been made to overcome chemical and microbial threats [15] to water supplies, mainly through a series of treatment strategies such as membrane filtration [16][17][18][19][20][21][22], the advanced oxidation process (AOP) [23,24] and bioremediation. Contaminants, such as 1,4-dioxane, considered a contaminant of emerging concern, can be treated via reverse osmosis in combination with AOP to comply with water quality guidelines that stipulate only 1 µg/L [1].…”

Section: Introductionmentioning

confidence: 99%

Efficacy of Continuous Flow Reactors for Biological Treatment of 1,4-Dioxane Contaminated Textile Wastewater Using a Mixed Culture

Lee¹,

Khan

Inam

et al. 2022

Fermentation

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The goal of this study was to evaluate the biodegradation of 1,4–dioxane using a mixed biological culture grown in textile wastewater sludge with 1,4–dioxane as the sole carbon source. The conditions for the long-term evaluation of 1,4–dioxane degradation were determined and optimized by batch scale analysis. Moreover, Monod’s model was used to determine the biomass decay rate and unknown parameters. The soluble chemical oxygen demand (sCOD) was used to determine the concentration of 1,4–dioxane in the batch test, and gas chromatography/mass spectrometry (GC/MS) was used to measure the concentrations via long-term wastewater analysis. Two types of reactors (continuous stirred reactor (CSTR) and plug flow reactor (PFR)) for the treatment of 1,4–dioxane from textile wastewater were operated for more than 120 days under optimized conditions. These used the mixed microbial culture grown in textile wastewater sludge and 1,4–dioxane as the sole carbon source. The results indicated efficient degradation of 1,4–dioxane by the mixed culture in the presence of a competitive inhibitor, with an increase in degradation time from 13.37 h to 55 h. A specific substrate utilization rate of 0.0096 mg 1,4–dioxane/mg MLVSS/h was observed at a hydraulic retention time of 20 h for 20 days of operation in a biomass concentration of 3000 mg/L produced by the mixed microbial culturing process. In the long-term analysis, effluent concentrations of 3 mg/L and <1 mg/L of 1,4–dioxane were observed for CSTR and PFR, respectively. The higher removal efficacy of PFR was due to the production of more MLVSS at 4000 mg/L compared to the outcome of 3000 mg/L in CSTR in a competitive environment.

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

Cited by 19 publications

References 77 publications

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

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

Water Recovery from Advanced Water Purification Facility Reverse Osmosis Concentrate by Photobiological Treatment Followed by Secondary Reverse Osmosis

Efficacy of Continuous Flow Reactors for Biological Treatment of 1,4-Dioxane Contaminated Textile Wastewater Using a Mixed Culture

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