Lancaster Environment Centre, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK.
Environ Pollut. 2009 Oct;157(10):2678-83. doi: 10.1016/j.envpol.2009.05.009. Epub 2009 Jun 6.
Soil was spiked with [9-(14)C]phenanthrene and [1-(14)C]hexadecane at 50 mg kg(-1) and aged for 1, 25, 50, 100 and 250 d. At each time point, the microcosms were amended with aqueous solutions of cyclodextrin (HP-beta-CD) at a range of concentrations (0-40 mM). Mineralisation assays and aqueous HP-beta-CD extractions were performed to assess the effect of the amendments on microbial degradation. The results showed that amendments had no significant impact on the microbial degradation of either of the (14)C-contaminants. Further, HP-beta-CD extractions were correlated with the mineralisation of the target chemicals in each of the soil conditions. It was found that the HP-beta-CD extraction was able to predict mineralisation in soils which had not been amended with cyclodextrin; however, in the soils containing the HP-beta-CD, there was no predictive relationship. Under the conditions of this study, the introduction of HP-beta-CD into soils did not enhance the biodegradation of the organic contaminants.
土壤中添加了 [9-(14)C]菲和 [1-(14)C]十六烷，浓度为 50mg/kg，老化时间分别为 1、25、50、100 和 250d。在每个时间点，用一系列浓度的环糊精（HP-β-CD）水溶液对微宇宙进行了修正（0-40mM）。进行了矿化分析和水相 HP-β-CD 提取，以评估这些添加剂对微生物降解的影响。结果表明，这些添加剂对两种（14)C 污染物的微生物降解均无显著影响。此外，HP-β-CD 提取与每种土壤条件下目标化学物质的矿化相关。结果发现，HP-β-CD 提取能够预测未用环糊精修正的土壤中的矿化；然而，在含有 HP-β-CD 的土壤中，没有预测关系。在本研究的条件下，将 HP-β-CD 引入土壤并没有增强有机污染物的生物降解。
