ArticleACS environmental Au2026
Microbial Transformation of 6‑PPDQ in Surface Water, Water-Sediment, and SoilResults from Simulation Tests with Radiolabeled Substrate.
Article in ACS environmental Au, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
6-PPDQ, an oxidation product of the antioxidant 6-PPD added to tire rubber, reaches the environment with tire abrasion on roads. Firm data on the environmental persistence of 6-PPDQ in different compartments is lacking. The microbial degradation of 6-PPDQ was studied in simulation tests under standardized conditions in the laboratory. Biodegradation half-life of 6-PPDQ (DT50) increased from surface water (12-17 d) over water-sediment systems including nonextractable residue (NER I) under aerobic conditions (46-55 d), soils including NER I under aerobic conditions (27-141 d, median 61 d), water-sediment systems under anaerobic conditions (140-202 d) to soil under anaerobic conditions (214-887 d, >10 000 d in one model). On this basis, 6-PPDQ would be considered nonpersistent according to ECHA's definition under aerobic conditions in water, in water-sediment systems, and in soil (median value and three of the four tested soils). 34% of the applied radioactivity (AR) of [
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