Transformation of atrazine by photolysis and radiolysis: kinetic parameters, intermediates and economic consideration

Georgina Rózsa, Ákos Fazekas, Máté Náfrádi, Tünde Alapi, Krisztina Schrantz, E. Takács, L. Wojnárovits, Andreas Fath, Thomas Oppenländer

Research output: Contribution to journalArticle

Abstract

Four techniques, UV254 nm photolysis, vacuum ultraviolet (VUV172 nm) photolysis, combined UV254 nm/VUV185 nm photolysis and gamma (γ) radiolysis were used to induce the transformation of atrazine in aqueous solution. The effects of dissolved oxygen (atrazine concentration 1 × 10−4 mol L−1 and 4.6 × 10−7 mol L−1) and matrix (high purity water/purified wastewater, atrazine concentration 4.6 × 10−7 mol L−1) and the electric energy requirements were investigated. The calculation of the energy input in cases of the photolyses was based on the lamp’s power. In radiolysis, the absorbed dose (J kg−1) was the basis. In UV photolysis, atrazine transforms to atrazine-2-hydroxy; this product practically does not degrade during UV photolysis; due to this reason, the mineralisation is very slow. This and some other products of atrazine decomposition degrade only in radical reactions. Dissolved oxygen usually slightly enhances the degradation rate. At 10−7 mol L−1 concentration level, the matrix, high purity water/purified wastewater, has not much influence on the degradation rates in UV photolysis and radiolysis. In the VUV and UV/VUV systems, considerable matrix effects were observed. Comparing the electric energy requirements of the four degradation processes, radiolysis was found to be the economically most feasible method, requiring 1–2 orders of magnitude less electric energy than UV/VUV, VUV and UV photolysis.

Original languageEnglish
JournalEnvironmental Science and Pollution Research
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

Atrazine
Radiolysis
Photolysis
Herbicides
atrazine
photolysis
Kinetic parameters
Economics
kinetics
economics
Dissolved oxygen
Waste Water
Degradation
degradation
matrix
energy
dissolved oxygen
Wastewater
Oxygen
wastewater

Keywords

  • AOPs
  • Atrazine
  • Energy requirements
  • Hydrated electron
  • Hydroxyl radical
  • Intermediates
  • Mineralisation

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Transformation of atrazine by photolysis and radiolysis : kinetic parameters, intermediates and economic consideration. / Rózsa, Georgina; Fazekas, Ákos; Náfrádi, Máté; Alapi, Tünde; Schrantz, Krisztina; Takács, E.; Wojnárovits, L.; Fath, Andreas; Oppenländer, Thomas.

In: Environmental Science and Pollution Research, 01.01.2019.

Research output: Contribution to journalArticle

Rózsa, Georgina ; Fazekas, Ákos ; Náfrádi, Máté ; Alapi, Tünde ; Schrantz, Krisztina ; Takács, E. ; Wojnárovits, L. ; Fath, Andreas ; Oppenländer, Thomas. / Transformation of atrazine by photolysis and radiolysis : kinetic parameters, intermediates and economic consideration. In: Environmental Science and Pollution Research. 2019.
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AU - Alapi, Tünde

AU - Schrantz, Krisztina

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