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Photolysis of bis(2-ethylhexyl) phthalate in aqueous solutions at the presence of natural water photoreactive constituents under simulated sunlight irradiation

  • Qian Yu
  • Xiyao Xiong
  • Jun He
  • Yuegang Zuo
  • Yong Chen
  • Chengjun WangEmail author
Research Article
  • 30 Downloads

Abstract

The photolysis of bis(2-ethylhexyl) phthalate (DEHP) under simulated sunlight in the presence of the natural water photoreactive constituents was investigated. The presence of nitrate or ferric ions facilitated the photodegradation of DEHP via oxidation by generation of •OH. The fulvic acids (FAs), at low concentrations, promoted the photolysis of DEHP via energy transfer from the photoreaction-generated 3FA*. However, the DEHP photolysis was inhibited with high concentrations of FAs since the excess FAs at the surface of solution could act as light screening agents to keep FAs in bulk solution from the light irradiation, further reducing the 3FA* generation. When low concentrations of FAs and chloride ions coexist, the reactive chloride species Cl• and Cl2 could generate via energy transfer from 3FA* to chloride ions and react with DEHP to enhance its degradation. Furthermore, the direct and •OH-initiated DEHP photodegraded intermediates and end products were identified by HPLC-MS2 and its corresponding photolysis pathways were proposed.

Keywords

Photodegradation Bis(2-ethylhexyl) phthalate Natural photoreactive constituents Aqueous photochemistry 

Notes

Acknowledgments

We thank Mrs. Jialu Lin and Shuihong Pan from Wenzhou University for their operation of LC-MS2 experimental test and analysis of the photodegraded products for this work.

Author contributions

All authors contributed equally.

Funding information

The research project was jointly supported by the National Natural Science Foundation of China (21477088) and the Initiating funding of South-Central University for Nationalities (YZZ18018).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

11356_2019_5913_MOESM1_ESM.doc (115 kb)
ESM 1 (DOC 115 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Resources and Environmental ScienceSouth-Central University for NationalitiesWuhanChina
  2. 2.Department of Chemical and Environmental EngineeringThe University of Nottingham Ningbo ChinaNingboChina
  3. 3.Department of Chemistry and BiochemistryUniversity of Massachusetts DartmouthNorth DartmouthUSA
  4. 4.School of Environmental Science and EngineeringHuazhong University of Science and TechnologyWuhanChina

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