Exploring Pathways and Mechanisms for Dichloroacetonitrile Formation from Typical Amino Compounds during UV/Chlorine Treatment.
UV/chlorine process
dichloroacetonitrile
nitrogenous disinfection byproducts
radicals
water treatment
Journal
Environmental science & technology
ISSN: 1520-5851
Titre abrégé: Environ Sci Technol
Pays: United States
ID NLM: 0213155
Informations de publication
Date de publication:
05 07 2022
05 07 2022
Historique:
pubmed:
16
6
2022
medline:
8
7
2022
entrez:
15
6
2022
Statut:
ppublish
Résumé
The formation of disinfection byproducts (DBPs) during UV/chlorine treatment, especially nitrogenous DBPs, is not well understood. This study investigated the formation mechanisms for dichloroacetonitrile (DCAN) from typical amino compounds during UV/chlorine treatment. Compared to chlorination, the yields of DCAN increase by 88-240% during UV/chlorine treatment from real waters, while the yields of DCAN from amino compounds increase by 3.3-5724 times. Amino compounds with electron-withdrawing side chains show much higher DCAN formation than those with electron-donating side chains. Phenylethylamine, l- phenylalanine, and l-phenylalanyl-l-phenylalanine were selected to represent amines, amino acids, and peptides, respectively, to investigate the formation pathways for DCAN during UV/chlorine treatment. First, chlorination of amines, amino acids, and peptides rapidly forms
Identifiants
pubmed: 35703371
doi: 10.1021/acs.est.2c01495
doi:
Substances chimiques
Acetonitriles
0
Amino Acids
0
Chloramines
0
Phenethylamines
0
Water Pollutants, Chemical
0
Phenylalanine
47E5O17Y3R
Chlorine
4R7X1O2820
dichloroacetonitrile
O0L64V63M9
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM