Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, United Kingdom.
Chemosphere. 2010 Apr;79(4):463-9. doi: 10.1016/j.chemosphere.2010.01.032. Epub 2010 Feb 19.
The development of phenanthrene catabolism in four soils amended with varying concentrations of activated charcoal (AC) (0%, 0.1%, 1% and 5%), a type of black carbon, was investigated. Mineralisation of (14)C-phenanthrene was monitored after 1, 25, 50 and 100 d soil-PAH contact time; lag phases, rates and extents of mineralisation of the (14)C-phenanthrene to (14)CO(2) were determined. At concentrations >0.1% AC rates and extents of mineralisation were reduced by more than 99%. This revealed that the presence of >0.1% AC in soils may substantially diminish the rate at which the catabolic activity of indigenous soil microflora develops in contaminated soil. Soil C, which had the highest organic carbon (OC) content, consistently exhibited the highest extents of degradation. It is suggested that, in accordance with other researchers, OC may have blocked available phenanthrene sorption sites. This enhanced phenanthrene availability ultimately facilitated a greater level of catabolic activity within this soil. Such results reflect the complex nature of interactions between soil, biota and contaminants and their influence on the degradation of contaminants in the environment.
研究了在添加不同浓度活性炭（AC）（0%、0.1%、1%和 5%）的四种土壤中菲代谢的发展，活性炭是一种黑碳。在 1、25、50 和 100 d 土壤-PAH 接触时间后监测了（14）C-菲的矿化；确定了（14）C-菲向（14）CO（2）的矿化的滞后期、速率和程度。在 AC 浓度>0.1%时，矿化的速率和程度降低了 99%以上。这表明土壤中>0.1%的 AC 的存在可能会大大降低受污染土壤中土著土壤微生物群落的代谢活性的发展速度。土壤 C 具有最高的有机碳（OC）含量，始终表现出最高的降解程度。据其他研究人员称，OC 可能阻止了可用的菲吸附位点。这增加了菲的可用性，最终促进了该土壤中更高水平的代谢活性。这些结果反映了土壤、生物区系和污染物之间相互作用的复杂性及其对环境中污染物降解的影响。
