Influence of short- and long-term exposure on the biodegradation capacity of activated sludge microbial communities in ready biodegradability tests

Dalmijn, Joost A.; Poursat, Baptiste A.J.; Spanning, Rob J.M. van; Brandt, Bernd W.; Voogt, P. de; Parsons, John R.

doi:10.1039/d0ew00776e

Cited by 4 publications

(2 citation statements)

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“…At least 71 bacterial strains from many different habitats worldwide are involved in caffeine biodegradation, possibly sustained by ancient metabolic pathways for methylxanthines (Summers et al, 2015;Vega et al, 2021). where a 2-month pre-exposure period enhanced metformin degradation, correlating with an increase in bacterial community diversity, composition and activity (Dalmijn et al, 2021).…”

Section: Kinetics Of Micropollutants Biotransformation In Stream Wate...mentioning

confidence: 99%

Reactive transport of micropollutants in laboratory aquifers undergoing transient exposure periods

Prieto-Espinoza

Chiara

Belfort

et al. 2023

Science of The Total Environment

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Section: Kinetics Of Micropollutants Biotransformation In Stream Wate...mentioning

confidence: 99%

Reactive transport of micropollutants in laboratory aquifers undergoing transient exposure periods

Prieto-Espinoza

Chiara

Belfort

et al. 2023

Science of The Total Environment

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“…However, it is reasonable to expect that microbes in many compartments have been exposed to industrial and naturally occurring chemicals. It has been suggested that including acclimation and adaptation in biodegradability tests may also reduce the variability often observed in tests using different inocula (Dalmijn et al, 2020 ). Taking account of adaptation processes in simulation tests would more accurately test the inherent degradability of a substance (Table 3 ).…”

Section: Major Challenges By Themementioning

confidence: 99%

Scientific concepts and methods for moving persistence assessments into the 21st century

Davenport

Curtis-Jackson

Dalkmann

et al. 2022

Integr Envir Assess & Manag

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The evaluation of a chemical substance's persistence is key to understanding its environmental fate, exposure concentration, and, ultimately, environmental risk. Traditional biodegradation test methods were developed many years ago for soluble, nonvolatile, single-constituent test substances, which do not represent the wide range of manufactured chemical substances. In addition, the Organisation for Economic Co-operation and Development (OECD) screening and simulation test methods do not fully reflect the environmental conditions into which substances are released and, therefore, estimates of chemical degradation half-lives can be very uncertain and may misrepresent real environmental processes. In this paper, we address the challenges and limitations facing current test methods and the scientific advances that are helping to both understand and provide solutions to them. Some of these advancements include the following: (1) robust methods that provide a deeper understanding of microbial composition, diversity, and abundance to ensure consistency and/or interpret variability between tests; (2) benchmarking tools and reference substances that aid in persistence evaluations through comparison against substances with well-quantified degradation profiles; (3) analytical methods that allow quantification for parent and metabolites at environmentally relevant concentrations, and inform on test substance bioavailability, biochemical pathways, rates of primary versus overall degradation, and rates of metabolite formation and decay; (4) modeling tools that predict the likelihood of microbial biotransformation, as well as biochemical pathways; and (5) modeling approaches that allow for derivation of more generally applicable biotransformation rate constants, by accounting for physical and/or chemical processes and test system design when evaluating test data. We also identify that, while such advancements could improve the certainty and accuracy of persistence assessments, the mechanisms and processes by which they are translated into regulatory practice and development of new OECD test guidelines need improving and accelerating. Where uncertainty remains, holistic weight of evidence approaches may be required to accurately assess the persistence of chemicals. Integr Environ Assess Manag 2022;1-34.

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The preparation and removal performance of carbamazepine/oxcarbazepine double template magnetic molecularly imprinted polymers

Li²,

Ke³

et al. 2023

Separation and Purification Technology

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Influence of short- and long-term exposure on the biodegradation capacity of activated sludge microbial communities in ready biodegradability tests

Abstract: The output of ready biodegradability tests (RBTs), that are extensively used to screen the potential of chemicals to be biodegraded, can be influenced by exposure of microbial communities to organic chemicals.

Cited by 4 publications

References 50 publications

Reactive transport of micropollutants in laboratory aquifers undergoing transient exposure periods

Reactive transport of micropollutants in laboratory aquifers undergoing transient exposure periods

Scientific concepts and methods for moving persistence assessments into the 21st century

The preparation and removal performance of carbamazepine/oxcarbazepine double template magnetic molecularly imprinted polymers

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