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Environmental fate & pathways

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A Ready biodegradability test (Eckenstein, 2018) following the dissolved organic carbon (DOC) concentration of the test item over a period of usually 28 days, when exposed to sewage sludge micro-organisms under defined conditions (OECD 301 A) was performed.

In the test vessels containing the test item in inoculated mineral medium the mean concentration of dissolved organic carbon (DOC) varied between 24.7 and 29.0 mg/L over the exposure period of 28 days and thus was not significantly different from the initial mean DOC concentration of 28.6 mg/L measured on Day 0. Expressed as percentage DOC removal, mean values in the range from -1.4 to 14  % were noted. By the end of the test (Exposure Day 28), average biodegradation was 9 %.