Fate of 2,4,6-tribromophenol (TBP) in environmental matrices is obscure. We used ¹⁴C-tracer to investigated mineralization, transformation, and non-extractable residue (NER)-formation of TBP in a soil under continuously oxic, continuously anoxic, and anoxic–oxic alteration conditions. In all cases, TBP rapidly dissipated, mineralized to CO₂, and formed NERs in the soil. Considerable amounts of transformation products (2–12%) were detected during the incubation. Marked mineralization (13–26%) indicated that soil microorganisms used TBP as their energy source. About 62–70% of the initial radioactivity was transformed into NERs, being mainly attributed to binding to humic and fulvic acid fractions. TBP transformation was significantly faster under oxic conditions than under anoxic conditions, and was boosted when the soil redox changed from anoxic to oxic state. The results provide new insights into fate of TBP in soil and suggest the importance to evaluate the stability of NERs for risk assessment of TBP in soil.

中文翻译：

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不同氧化还原条件下土壤中2,4,6-三溴酚的去向。

在环境基质中2,4,6-三溴苯酚（TBP）的命运是模糊的。我们使用¹⁴ C示踪剂研究了在连续氧化，连续缺氧和缺氧-缺氧变化条件下土壤中TBP的矿化，转化和不可提取的残留（NER）形成。在所有情况下，TBP都会迅速消散，矿化为CO ₂并在土壤中形成NERs。在孵育过程中检测到相当数量的转化产物（2–12％）。明显的矿化作用（13–26％）表明土壤微生物利用TBP作为能源。最初的放射性中约有62–70％被转化为NERs，主要归因于与腐殖酸和黄腐酸组分的结合。在有氧条件下，TBP转化明显快于在无氧条件下，并且当土壤氧化还原从无氧状态变为有氧状态时，TBP转化得到促进。结果为土壤中TBP的命运提供了新的见解，并建议评估NERs的稳定性对于土壤中TBP风险评估的重要性。