Transformation of phthalates and their metabolites in wastewater under different sewer conditions

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Chang He
  • Jiaying Li
  • Guangming Jiang
  • Shuo Chen
  • Cherry Niel
  • Jochen F. Mueller
  • Phong Thai

Detail(s)

Original languageEnglish
Article number116754
Journal / PublicationWater Research
Volume190
Online published15 Dec 2020
Publication statusPublished - 15 Feb 2021
Externally publishedYes

Abstract

There is an increasing demand to monitor the human exposure to phthalates, and a few studies have used phthalate metabolites in wastewater to estimate exposure to these chemicals in the population. However, it is suspected that the stability of phthalates and phthalate metabolites during sewer transport can influence the final estimates. In this study, we used laboratory sewer reactors to evaluate the in-sewer transformation of phthalates and their metabolites, and deconjugation of phthalate metabolites. We found concentrations of parent phthalates decreased quickly over time while the concentrations of phthalate metabolites increased significantly for most compounds, indicating that parent phthalate compounds are partly transformed into their metabolites in the sewer. Our assessment of the deconjugation of glucuronide-conjugated phthalate metabolites found that this process did not significantly affect the concentrations of phthalate metabolites in the wastewater, with the relative difference ranging from -16% to 7% between enzymatically treated samples and control group. Additionally, our results showed that phthalate metabolites could be subject to rapid degradation during the incubation process. Our findings suggested that the level of phthalate metabolites in sewage could be strongly influenced by the in-sewer transformation of the parent phthalates and of themselves, and could not be assumed as uniquely the results of urinary excretion after human exposure to parent phthalates. © 2020 Elsevier Ltd.

Research Area(s)

  • Biofilm, Glucuronide conjugate, Phthalate diesters, Phthalate monoesters, Transformation

Citation Format(s)

Transformation of phthalates and their metabolites in wastewater under different sewer conditions. / He, Chang; Li, Jiaying; Jiang, Guangming et al.
In: Water Research, Vol. 190, 116754, 15.02.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review