Degradation

  • Fera offer the full range of OECD degradation tests, as well as bespoke studies to meet specific requirements
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Degradation

Biodegradation is one of the most important factors in assessing the environmental fate of chemicals. Fera environmental fate studies include a range of regulatory-compliant tests to assess the biodegradation of chemicals in soil and water. By understanding how chemical products are broken down and degraded in the natural environment, we can supply the data you need for your environmental risk assessments – ensuring you meet all regulatory requirements in the development of safe new chemical products.


Our Degradation Services
  • Full range of OECD biodegradability tests.
  • Bespoke tests designed to address specific issues.
  • Tests comply with all regulations.
  • Provide essential data for new product registrations.

Environmental Fate Degradation Services

We offer the full range of OECD degradation tests, as well as bespoke studies to meet specific requirements:

OECD 307

Aerobic and Anaerobic Transformation in Soil

This study is used to measure the time course of biodegradation of a test substance in soil under aerobic and anaerobic conditions, and to quantify the observations.

OECD 308

Aerobic and Anaerobic Transformation in Aquatic Sediment Systems

The purpose of this study is to measure the time course of biodegradation of a test substance in aquatic sediment systems under aerobic and anaerobic conditions, and to quantify the observations.

OECD 309

Aerobic Mineralisation in Surface Water – Simulation Biodegradation Test

This study is used to measure the time course of biodegradation of a test substance at low concentration in aerobic natural water, and to quantify the observations.

OECD 310

Ready Biodegradability – CO2 in sealed vessels (Headspace Test)

Substances entering the aquatic environment via waste water come into contact with the sewage treatment microorganisms. These are therefore the basis for the assessment of aquatic biodegradation in this test.

OECD 314

Simulation Tests to Assess the Biodegradability of Chemicals Discharged in Wastewater

This study observes the ultimate biodegradation of organic chemicals whose route of entry into the environment begins with their discharge to wastewater. It consists of five simulation tests in:

  • a) Sewer systems.
  • b) Activated sludge.
  • c) Anaerobic digester sludge.
  • d) Treated effluent in the mixing zone of surface water.
  • e) Untreated wastewater that is directly discharged to surface water.
These tests are appropriate for chemicals released continuously or episodically to wastewater.

OECD 316

Phototransformation of Chemicals in Water – Direct Photolysis

Direct photolysis involves the transformation of a chemical resulting from the direct absorption of a solar photon. Direct photolysis can be an important dissipation pathway for a chemical that exhibits significant light absorption, above 290 nm cut-off of the solar irradiation at the earth’s surface. The purpose of this test is to investigate the potential effects of solar irradiation on the test substance in water.

EFSA 2014/NAFTA 2006

Field dissipation studies for actives and transformation products

This study evaluates laboratory and field dissipation to obtain values (DegT50) of pesticide active substances and their transformation and reaction products (metabolites) in soil. The values are used in the current FOCUS modelling frameworks for estimating groundwater and surface water exposure levels. In addition, they are used in the soil exposure scenarios developed by EFSA as a result of the revision of the Guidance Document on Persistence of Pesticides in Soil.


Bespoke chemical fate studies

Our scientists can also work with you to investigate the fate of chemicals under non-standard scenarios. All tests are performed to GLP standards for registration purposes, and can include:

  • Effects of rainfall on volatilisation of pesticides from a soil surface.
  • Air concentrations arising from transpiration of pesticides.
  • Domestic losses of biocides to the environment.
  • Veterinary medicinal product losses from farmyards.
  • Uptake of pharmaceuticals into plants.

For more information on our bespoke services, please get in touch.


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