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Environmental fate & pathways

Biodegradation in soil

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Biodegradation of [S,S]-EDDS acid was shown to be rapid and complete in a sludge-amended soil, with ThOD reaching 99% within a 28-day exposure period (Schowanek et al. 1997).
In a soil die-away test, mineralisation of radiolabelled [S,S]-EDDS in sludge-amended soil was rapid and complete in 28 days, with a calculated half-life of 2.5 days, suggesting that biodegradation also occurs under realistic environmental conditions (Jaworska et al. 1999).

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According to a published study, 14C-labelled [S,S]-EDDS acid was incubated at a concentration of 1 mg/kg with sludge-amended soil from a corn field in Phoenixville, PA, USA. The objective was to mimic the introduction of chemicals into soil on sludge. Based on ThOD calculations, mineralization was rapid and complete within a 28-day period, therefore biodegradation of [S,S]-EDDS acid was considered to be rapid and complete under these conditions (Schowanek et al. 1997).

In a soil die-away test, mineralisation of radiolabelled [S,S]-EDDS in sludge-amended soil was rapid and complete in 28 days, with a calculated half-life of 2.5 days, suggesting that biodegradation also occurrs under realistic environmental conditions (Jaworska et al. 1999).