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Removal of wastewater and polymer derived N-nitrosodimethylamine precursors with integrated use of chlorine and chlorine dioxide.
Chemosphere. 2019 Feb; 216:224-233.C

Abstract

In this study, the effects of five different pre-oxidation scenarios (i.e., individual, simultaneous, and sequential applications of chlorine dioxide [ClO2] and chlorine [Cl2]) on the removal of N-nitrosodimethylamine (NDMA) formation potential (FP) from different water matrices (i.e., non-impacted natural waters, wastewater [WW]-impacted, and polymer-impacted waters) with subsequent chloramination were investigated. Practically relevant doses of ClO2 and Cl2 were applied for all scenarios to avoid the formation of disinfection by-products (DBPs) at regulatory levels. The removal efficiency of NDMA FP for all the oxidation scenarios (individual or simultaneous) was <20% in non-impacted natural water samples. In 20% WW-impacted waters, pre-oxidation with ClO2 at pH 7.8 resulted in a significant reduction in NDMA FP (56-73%), whereas pre-oxidation with Cl2 showed less removals (40-50%). For the integrated oxidation scenarios (i.e., simultaneous or sequential application), NDMA FP removals further increased (20-45%), especially, at pH 6.0 compared to individual application of oxidants in WW-impacted waters. The formation of NDMA in pre-oxidized water samples also decreased significantly under uniform formation condition (UFC). In polymer-impacted waters, integrated applications of Cl2 and ClO2 significantly improved the deactivation of polymer-derived NDMA precursors independent of oxidation time (10 vs. 60 min) and pH (6.0 vs. 7.8) compared to individual application of these oxidants. In addition, chlorite (ClO2-) formation was low and maintained well below 1 mg/L for integrated applications of Cl2 and ClO2, while chlorate (ClO3-) formation increased significantly as compared to application of ClO2 only.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Uzun H
Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625, USA; Department of Environmental Engineering, Marmara University, 34722 Istanbul, Turkey.
Kim D
Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625, USA.
Karanfil T
Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625, USA. Electronic address: tkaranf@clemson.edu.

MeSH

ChlorineChlorine CompoundsDimethylnitrosamineOxidation-ReductionOxidesPolymersWastewaterWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30384291

Citation

Uzun, Habibullah, et al. "Removal of Wastewater and Polymer Derived N-nitrosodimethylamine Precursors With Integrated Use of Chlorine and Chlorine Dioxide." Chemosphere, vol. 216, 2019, pp. 224-233.
Uzun H, Kim D, Karanfil T. Removal of wastewater and polymer derived N-nitrosodimethylamine precursors with integrated use of chlorine and chlorine dioxide. Chemosphere. 2019;216:224-233.
Uzun, H., Kim, D., & Karanfil, T. (2019). Removal of wastewater and polymer derived N-nitrosodimethylamine precursors with integrated use of chlorine and chlorine dioxide. Chemosphere, 216, 224-233. https://doi.org/10.1016/j.chemosphere.2018.10.088
Uzun H, Kim D, Karanfil T. Removal of Wastewater and Polymer Derived N-nitrosodimethylamine Precursors With Integrated Use of Chlorine and Chlorine Dioxide. Chemosphere. 2019;216:224-233. PubMed PMID: 30384291.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Removal of wastewater and polymer derived N-nitrosodimethylamine precursors with integrated use of chlorine and chlorine dioxide. AU - Uzun,Habibullah, AU - Kim,Daekyun, AU - Karanfil,Tanju, Y1 - 2018/10/16/ PY - 2018/04/16/received PY - 2018/10/05/revised PY - 2018/10/14/accepted PY - 2018/11/2/pubmed PY - 2019/1/12/medline PY - 2018/11/2/entrez KW - Chlorine KW - Chlorine dioxide KW - Integrated oxidation KW - NDMA KW - pH SP - 224 EP - 233 JF - Chemosphere JO - Chemosphere VL - 216 N2 - In this study, the effects of five different pre-oxidation scenarios (i.e., individual, simultaneous, and sequential applications of chlorine dioxide [ClO2] and chlorine [Cl2]) on the removal of N-nitrosodimethylamine (NDMA) formation potential (FP) from different water matrices (i.e., non-impacted natural waters, wastewater [WW]-impacted, and polymer-impacted waters) with subsequent chloramination were investigated. Practically relevant doses of ClO2 and Cl2 were applied for all scenarios to avoid the formation of disinfection by-products (DBPs) at regulatory levels. The removal efficiency of NDMA FP for all the oxidation scenarios (individual or simultaneous) was <20% in non-impacted natural water samples. In 20% WW-impacted waters, pre-oxidation with ClO2 at pH 7.8 resulted in a significant reduction in NDMA FP (56-73%), whereas pre-oxidation with Cl2 showed less removals (40-50%). For the integrated oxidation scenarios (i.e., simultaneous or sequential application), NDMA FP removals further increased (20-45%), especially, at pH 6.0 compared to individual application of oxidants in WW-impacted waters. The formation of NDMA in pre-oxidized water samples also decreased significantly under uniform formation condition (UFC). In polymer-impacted waters, integrated applications of Cl2 and ClO2 significantly improved the deactivation of polymer-derived NDMA precursors independent of oxidation time (10 vs. 60 min) and pH (6.0 vs. 7.8) compared to individual application of these oxidants. In addition, chlorite (ClO2-) formation was low and maintained well below 1 mg/L for integrated applications of Cl2 and ClO2, while chlorate (ClO3-) formation increased significantly as compared to application of ClO2 only. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/30384291/Removal_of_wastewater_and_polymer_derived_N_nitrosodimethylamine_precursors_with_integrated_use_of_chlorine_and_chlorine_dioxide_ DB - PRIME DP - Unbound Medicine ER -