Biooxidation of tripropylene glycol under aerobic conditions

Biooxidation of tripropylene glycol under aerobic conditions,10.1007/s10532-007-9142-6,Biodegradation,Agnieszka Zgoła-Grześkowiak,Tomasz Grześkowiak,J

Biooxidation of tripropylene glycol under aerobic conditions  
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Aerobic biodegradation of tripropylene glycol (PG3) was investigated under the conditions of the OECD screening test 301E and the Continuous Flow Activated Sludge Simulation test (CFAS). A modified two-chamber facility with a denitrification stage was used for the CFAS test. Primary PG3 biodegradation was measured by the HPLC with fluorimetric detection and analyte derivatisation. Metabolites were identified by LC-MS with electrospray ionisation and GC-MS with electron impact ionisation, as well as semiquantitatively determined by the LC-MS technique. PG3 was found to be inherently biodegradable and it exhibits a strong poisonous effect on activated sludge after exceeding the threshold concentration (10 mg l−1). Metabolite accumulation onto the activated sludge is probably responsible for this poisonous effect. Probable biotransformation products of tripropylene glycol under the aerobic conditions include metabolites with a single terminal aldehyde or a ketone group and metabolites with two terminal aldehyde or ketone groups. Their concentration rises at the end of the OECD screening test.
Journal: Biodegradation , vol. 19, no. 3, pp. 365-373, 2008
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