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首页> 外文期刊>Applied Microbiology and Biotechnology >Enhancing the mineralization of [U-C-14]dibenzo-p-dioxin in three different soils by addition of organic substrate or inoculation with white-rot fungi
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Enhancing the mineralization of [U-C-14]dibenzo-p-dioxin in three different soils by addition of organic substrate or inoculation with white-rot fungi

机译：通过添加有机底物或接种白腐真菌增强[U-C-14]二苯并-对-二恶英在三种不同土壤中的矿化作用

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The potential for aerobic mineralization of [U-C-14]dibenzo-p-dioxin (DD) was investigated in samples of three different agricultural soils already contaminated with polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) by industrial activities. The influence of amendments, i.e. wheat straw and compost, and of soil treatment by inoculation with lignolytic fungi, grown on wheat straw substrate, was tested. All the soils tested contained an indigenous DD-mineralizing microflora. The soil characterized by the highest organic matter content and the highest content of soil microbial biomass displayed the best DD mineralization of 36.6% within 70 days, compared with the two organic-matter-poor soils with an endogenous DD mineralization of 19.5% and 23.3% respectively. Amendments with compost increased DD mineralization up to 28% in both soils with low organic matter and microbial biomass content, but did not affect mineralization in the organic-matter-rich soil. Addition of wheat straw had no constant influence on DD mineralization in the soils tested. The best DD mineralization resulted from inoculation with lignolytic white-rot fungi (Phanerochaete chrysosporium, Pleurotus sp. Florida, Dichomitus squalens) and with an unidentified lignolytic fungus, which was isolated originally from a long-term PCDD/F-contaminated soil. A mineralization of up to 50% within 70 days was reached by this treatment. The influence of inoculated fungi on mineralization differed between the soils investigated.
机译：在已经被工业活动污染了多氯二苯并-二恶英和二苯并呋喃（PCDD / F）的三种不同农业土壤的样品中，研究了[U-C-14]二苯并-对二恶英（DD）有氧矿化的潜力。测试了小麦秸秆和堆肥等改良剂的影响，以及通过接种在小麦秸秆基质上的木质素真菌接种土壤处理的影响。所有测试的土壤均含有本地的DD矿化微生物区系。具有最高有机质含量和最高微生物微生物量含量的土壤在70天内表现出最佳的DD矿化度，而两种有机质较差的土壤的内源DD矿化度分别为19.5％和23.3％分别。在有机物含量低和微生物生物量含量低的土壤中，使用堆肥进行改良可使DD的矿化度提高多达28％，但并不影响富含有机物的土壤中的矿化作用。小麦秸秆的添加对测试土壤中DD的矿化没有恒定的影响。最好的DD矿化作用是接种木质素化白腐真菌（Phanerochaete chrysosporium，Pleurotus sp.Florida，Dichomitus squalens）和未鉴定的木质素化真菌，该真菌最初是从长期受PCDD / F污染的土壤中分离出来的。通过这种处理，在70天内达到了50％的矿化度。在所研究的土壤之间，接种真菌对矿化的影响有所不同。

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