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EC number: 202-708-7 | CAS number: 98-86-2
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
In a study conducted according to the standard BOD technique (APHA (1980) and using three different inoculum sources (ground water, river water, and harbour water), acetophenone biodegradation and the corresponding half-lives were in the range between ca. 40 and 82% and 4 (harbor water), 8 d in river water, and 32 d (ground water), respectively. The authors assumed, that the observed high biodegradation rate of acetophenone using harbour water as inoculum may be due to the fertility and/or the presence of microorganisms that were pre-exposed to the test chemical or similar chemicals. In another study, the biodegradation of acetophenone was investigated using Ohio River water as inoculum. The biodegradability was followed by determination of carbon dioxide production. The test was conducted at pH 7.2+/-0.1 and temperatures in the range of 22-25°C. After 10 d samples were redosed to check possible acclimation. Initially, a lag phase of about three days was observed. Thereafter acetophenone was biodegraded relative quickly: ca. 50% degradation after 6 days based on CO2 production due to oxidation of test item and ThCO2 production. Redosing after 10 days resulted in rapid degradation: ca. 50% were degraded after 3 days.
Key value for chemical safety assessment
Additional information
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