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Citation
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HERO ID
1315304
Reference Type
Journal Article
Title
Compound-specific isotope analysis for aerobic biodegradation of phthalate acid esters
Author(s)
Peng, X; Li, X
Year
2012
Is Peer Reviewed?
1
Journal
Talanta
ISSN:
0039-9140
EISSN:
1873-3573
Volume
97
Page Numbers
445-449
Language
English
PMID
22841106
DOI
10.1016/j.talanta.2012.04.060
Web of Science Id
WOS:000308268800067
URL
https://search.proquest.com/docview/1710213896?accountid=171501
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Abstract
The degradation of three phthalic acid esters (PAEs) (dimethyl phthalate (DMP), diethyl phthalate (DEP) and di-n-butyl phthalate (DBP)) by natural microbial community under aerobic condition and their isotope fractionation were compared by using a laboratory microcosm system with natural marine sediment overlying with natural seawater. The results showed that the degradation of the three tested PAEs followed a first-order kinetics, with rate constants of 0.0541, 0.0352 and 0.00731 day(-1) for DMP, DBP and DOP, respectively, indicating that the degradation rate of PAEs is a inverse function of the length of the alkyl side chain: the longer the side chain, the slower the rate is. (13)C isotope enrichment of the three residual PAEs were evaluated with compound-specific isotope analysis (CSIA). A relatively obvious (13)C enrichment, with maximum δ(13)C shifts of Δδ(13)C(DMP)=2.05±0.21‰ (f=0.17) and Δδ(13)C(DBP)=1.92±0.23‰ (f=0.08) in the residual DMP and DBP, respectively, was observed at an advanced stage of biodegradation. No significant (13)C enrichment occurred in the residual DOP (Δδ(13)C(DOP)=0.55±0.21‰, f=0.16) within the accuracy and reproducibility for GC-C-IRMS (±0.5‰). The experimental results indicated that the degree of isotopic fractionation in the three residual PAEs appeared to be related to the number of carbon atoms, which is in the order of DMP>DBP>DOP.
Keywords
Compound-specific isotope analysis; Phthalic acid esters; Priority pollutant; Aerobic degradation
Tags
IRIS
•
Dibutyl Phthalate (DBP)
Database Searches
Pubmed
Web of Science
LitSearch Nov 2012
PubMed
WOS
Merged reference set
LitSearch Dec 2012 - June 2013
Web of Science
Excluded: No Primary Data on Health Effects
Fate and transport
•
Diethyl phthalate (DEP)
Database searches
Initial Litsearch
PubMed
Web of Science
Merged reference set
Aug 2013 update
Web of Science
Jan 2020 update
PubMed
Web of Science
New for this project
Excluded: No Primary Data on Health Effects
Chemical treatment/disposal/remediation
Fate and transport
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