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Comparative study on DBPs formation profiles of intermediate organics from hydroxyl radicals oxidation of microbial cells.
Chemosphere. 2016 May; 150:109-115.C

Abstract

This study assessed the characteristics of disinfection byproducts (DBPs) formation from intermediate organics during UV/H2O2 treatment of activated sludge and algae cells under various reaction conditions. The DBPs including trihalomethanes (THMs), haloacetic acids (HAAs), haloketones (HKs) and haloacetonitriles (HANs) in UV/H2O2-treated and chlorinated water were measured. The results showed that both dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) increased during the initial stage of UV/H2O2 treatment due to the lysis of sludge and algae cells, which enhanced the formation of both C- and N-DBPs; however, both DOC and DON decreased after longer reaction times. During the UV/H2O2 treatments, THMs formation potential (THMFP) peaked earlier than did HAAs formation potential (HAAFP). This shows that the dissolved organics released from lysis of microbial cells in the early stages of oxidation favor the production of THMs over HAAs; however, HAAs precursors increased with the oxidation time. Chlorination with bromide increased the formation of THMs and HAAs but less HKs and HANs were produced. Comparisons of normalized DBP formation potential (DBPFP) of samples collected during UV/H2O2 treatments of four different types of organic matter showed that the highest DBPFP occurred in filtered treated wastewater effluent, followed by samples of activated sludge, filtered eutrophicated pond water, and samples of algae cells. With increasing oxidation time, the dominant DBP species shifted from THMs to HAAs in the samples of activated sludge and algae cells. The DBPFP tests also showed that more HAAs were formed in biologically treated wastewater effluent, while the eutrophicated source water produced more THMs.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Ou TY
Institute of Environmental Health, National Taiwan University, Taipei City, Taiwan.
Wang GS
Institute of Environmental Health, National Taiwan University, Taipei City, Taiwan. Electronic address: gswang@ntu.edu.tw.

MeSH

AcetatesAcetonitrilesBromidesDisinfectantsDisinfectionFresh WaterHalogenationHydrogen PeroxideHydroxyl RadicalOxidation-ReductionSewageTrihalomethanesUltraviolet RaysWastewaterWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26894677

Citation

Ou, Tai-You, and Gen-Shuh Wang. "Comparative Study On DBPs Formation Profiles of Intermediate Organics From Hydroxyl Radicals Oxidation of Microbial Cells." Chemosphere, vol. 150, 2016, pp. 109-115.
Ou TY, Wang GS. Comparative study on DBPs formation profiles of intermediate organics from hydroxyl radicals oxidation of microbial cells. Chemosphere. 2016;150:109-115.
Ou, T. Y., & Wang, G. S. (2016). Comparative study on DBPs formation profiles of intermediate organics from hydroxyl radicals oxidation of microbial cells. Chemosphere, 150, 109-115. https://doi.org/10.1016/j.chemosphere.2016.01.124
Ou TY, Wang GS. Comparative Study On DBPs Formation Profiles of Intermediate Organics From Hydroxyl Radicals Oxidation of Microbial Cells. Chemosphere. 2016;150:109-115. PubMed PMID: 26894677.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparative study on DBPs formation profiles of intermediate organics from hydroxyl radicals oxidation of microbial cells. AU - Ou,Tai-You, AU - Wang,Gen-Shuh, Y1 - 2016/02/16/ PY - 2015/10/15/received PY - 2016/01/29/revised PY - 2016/01/31/accepted PY - 2016/2/20/entrez PY - 2016/2/20/pubmed PY - 2016/12/15/medline KW - Activated sludge KW - Advanced oxidation process KW - Algae cells KW - DBPs KW - UV/H(2)O(2) SP - 109 EP - 115 JF - Chemosphere JO - Chemosphere VL - 150 N2 - This study assessed the characteristics of disinfection byproducts (DBPs) formation from intermediate organics during UV/H2O2 treatment of activated sludge and algae cells under various reaction conditions. The DBPs including trihalomethanes (THMs), haloacetic acids (HAAs), haloketones (HKs) and haloacetonitriles (HANs) in UV/H2O2-treated and chlorinated water were measured. The results showed that both dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) increased during the initial stage of UV/H2O2 treatment due to the lysis of sludge and algae cells, which enhanced the formation of both C- and N-DBPs; however, both DOC and DON decreased after longer reaction times. During the UV/H2O2 treatments, THMs formation potential (THMFP) peaked earlier than did HAAs formation potential (HAAFP). This shows that the dissolved organics released from lysis of microbial cells in the early stages of oxidation favor the production of THMs over HAAs; however, HAAs precursors increased with the oxidation time. Chlorination with bromide increased the formation of THMs and HAAs but less HKs and HANs were produced. Comparisons of normalized DBP formation potential (DBPFP) of samples collected during UV/H2O2 treatments of four different types of organic matter showed that the highest DBPFP occurred in filtered treated wastewater effluent, followed by samples of activated sludge, filtered eutrophicated pond water, and samples of algae cells. With increasing oxidation time, the dominant DBP species shifted from THMs to HAAs in the samples of activated sludge and algae cells. The DBPFP tests also showed that more HAAs were formed in biologically treated wastewater effluent, while the eutrophicated source water produced more THMs. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/26894677/Comparative_study_on_DBPs_formation_profiles_of_intermediate_organics_from_hydroxyl_radicals_oxidation_of_microbial_cells_ DB - PRIME DP - Unbound Medicine ER -