Refinement of the P assessment of ionisable substances: Distribution and degradation of anionic, neutral and cationic organic chemicals in water-sediment systems

Description: The criteria for the assessment of ⁠PBT substances were developed for neutral organic substances. Many chemicals are, however, charged under environmentally relevant pH conditions. The influence of a charge in molecule on its potential to degrade in the environment is unclear and therefore the research question of this project. The results show that especially a positive charge can strongly influence the degradation of a substance in the environment. The degradation half-live of the cationic model substance was clearly slowed down in a water simulation test (⁠OECD⁠ 309) and also in a sediment simulation test (⁠ OECD ⁠ 308). First suggestions for an adaption of the method to evaluate the persistence of charged organic chemicals were made. Veröffentlicht in Texte | 78/2022.

Types:

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    text_type: Publication,
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Origin: /Bund/UBA/Webseite

Tags: PBT-Stoff ? OECD ? Organische Verbindung ? Gebühr ? Bewertungskriterium ? Chemikalien ? Sediment ? Wasser ? Stoff ? Persistenz ?

License: other-closed

Language: Englisch/English

Organisations

• Umweltbundesamt (Herausgeber*in)

Persons

• Hannah Holzmann (Verfasser*in)
• Prof. Dr. Andreas Schäffer (Verfasser*in)

Issued: 2022-07-01

Time ranges: 2022-07-01 - 2022-07-01

Resources

• article: Fate of 14C-labelled ionic organic chemicals in a water-sediment system and surface water

  https://www.sciencedirect.com/science/article/pii/S0045653522013789?via%3Dihub (Webseite)
• https://www.umweltbundesamt.de/sites/default/files/medien/479/publikationen/texte_78-2022_refinement_of_the_p_assessment_of_ionisable_substances.pdf (PDF)

Status

Aktiv

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