Fungal biodegradation of the N-nitrosodimethylamine precursors venlafaxine and O-desmethylvenlafaxine in water

Marta Llorca, Francesc Castellet-Rovira, María José Farré, Adrián Jaén-Gil, Maira Martínez-Alonso, Sara Rodríguez-Mozaz, Montserrat Sarrà, Damià Barceló

Research output: Contribution to journalArticleResearch

5 Citations (Scopus)

Abstract

© 2018 Elsevier Ltd Antidepressant drugs such as Venlafaxine (VFX) and O-desmethylvenlafaxine (ODMVFX) are emerging contaminants that are commonly detected in aquatic environments, since conventional wastewater treatment plants are unable to completely remove them. They can be precursors of hazardous by-products, such as the carcinogenic N-nitrosodimethylamine (NDMA), generated upon water chlorination, as they contain the dimethylamino moiety, necessary for the formation of NDMA. In this study, the capability of three white rot fungi (Trametes versicolor, Ganoderma lucidum and Pleurotus ostreatus) to remove both antidepressants from water and to decrease NDMA formation potential was investigated. Furthermore, transformation by-products (TPs) generated along the treatment process were elucidated and also correlated with their NDMA formation potential. Very promising results were obtained for T. versicolor and G. lucidum, both being able to remove up to 100% of ODMVFX. In the case of VFX, which is very recalcitrant to conventional wastewater treatment, a 70% of removal was achieved by T. versicolor, along with a reduction in NDMA formation potential, thus decreasing the associated problems for human health and the environment. However, the NDMA formation potential remained practically constant during treatment with G. lucidum despite of the equally high VFX removal (70%). This difference was attributed to the generation of different TPs during both fungal treatments. For example, G. lucidum generated more ODMVFX, which actually has a higher NDMA formation potential than the parent compound itself.
Original languageEnglish
Pages (from-to)346-356
Number of pages11
JournalEnvironmental Pollution
Volume246
DOIs
Publication statusPublished - 1 Mar 2019

Keywords

  • Carcinogenic N– nitrosodimethylamine (NDMA)
  • Contaminated water
  • Fungal treatment
  • Potential human health and environmental problems
  • Psychiatric drugs
  • Transformation by-products
  • Biodegradation, Environmental
  • Water Pollutants, Chemical/analysis
  • Desvenlafaxine Succinate/metabolism
  • Trametes/metabolism
  • Waste Water/analysis
  • Water Purification/methods
  • Venlafaxine Hydrochloride/metabolism
  • Dimethylnitrosamine/metabolism
  • TRANSFORMATION PRODUCTS
  • HOSPITAL WASTE-WATER
  • NDMA FORMATION
  • URBAN WASTEWATERS
  • PLEUROTUS-OSTREATUS
  • SOLID-PHASE EXTRACTION
  • ACTIVE COMPOUNDS PHACS
  • TRAMETES-VERSICOLOR
  • LIQUID-CHROMATOGRAPHY
  • PHARMACEUTICALS REMOVAL
  • Carcinogenic N- nitrosodimethylamine (NDMA)

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