Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
4320321
Reference Type
Journal Article
Title
Photochemical transformation of dimethyl phthalate (DMP) with N(iii)(H2ONO+/HONO/NO2-) in the atmospheric aqueous environment
Author(s)
Lei, Y; Zhu, C; Lu, J; Chen, R; Xiao, J; Peng, S
Year
2018
Is Peer Reviewed?
1
Journal
Photochemical and Photobiological Sciences
ISSN:
1474-905X
EISSN:
1474-9092
Publisher
ROYAL SOC CHEMISTRY
Location
CAMBRIDGE
Volume
17
Issue
3
Page Numbers
332-341
Language
English
PMID
29384165
DOI
10.1039/c7pp00283a
Web of Science Id
WOS:000435353300008
Abstract
The photochemical transformation of dimethyl phthalate (DMP) with N(iii)(NO2-/HONO/H2ONO+) was investigated using 365 nm steady-state irradiation and 355 nm laser flash photolysis (LFP) techniques. The results showed that N(iii) concentration, DMP initial concentration and pH values all strongly affected the oxidation efficiency of DMP. The primary step of the reaction was the attack of ˙OH radicals on the aromatic ring to form a DMP-OH adduct, and the bimolecular rate constant was determined to be (5.5 ± 0.4) × 109 M-1 s-1. The DMP-OH adduct not only underwent monomolecular self-decay with a rate constant of (1.6 ± 0.3) × 104 s-1 but also interacted with HONO, H2ONO+ and O2 with rate constants of (6.4 ± 0.4) × 106 M-1 s-1, (8.8 ± 0.5) × 106 M-1 s-1 and (1.6 ± 0.1) × 108 M-1 s-1, respectively. Major transformation products including methyl salicylate, monomethyl phthalate, dimethyl 4-hydroxyphthalate and dimethyl 4-nitrophthalate were identified by GC-MS and characteristics of these secondary contaminants required extra attention.
Tags
IRIS
•
Dibutyl Phthalate (DBP)
Database Searches
LitSearch July 2017 - Sept 2018
New from Previous
Pubmed
•
Nitrate/Nitrite
LitSearch Update 2018/1/1 - 2022/8/17
WoS
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity