Soil Science Engineering Department, University College of Agriculture & Natural Resource, University of Tehran, Karaj, Iran.
Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, China.
Int J Phytoremediation. 2021;23(5):445-453. doi: 10.1080/15226514.2020.1825326. Epub 2020 Oct 5.
This study investigated the effects of hydrocarbon-degrading bacteria and organic matter on a crude oil-polluted soil by . The treatments consisted of crude oil at two levels (3 and 6% w/w), municipal waste compost at two levels (5 and 10% v/v), and two different bacterial strains ( sp.141 and sp. 27ps). At the end of the growth period, the plants were harvested and prepared for the laboratory analyses. The greatest population of oil degrading-bacteria (4.6 × 10 CFU/g soil) was observed in the treatment containing 10% compost, 6% crude oil, and sp.141. The highest crude oil degradation (76.49%) was recorded in the soil polluted with 6% crude oil, amended with 10% compost, and inoculated with sp.141. The investigation on the degradation of the chains of C10-C35 compounds indicated that, in various treatments, the most abundant compound was among those with fewer carbon atoms (C12-C25), so the application of organic matter boosted the degradation of crude oil. In conclusion, seedlings has an acceptable efficiency in the remediation of the oil-contaminated soil affected by biological factors (compost and bacteria), which is because of their high tolerance to the pollution and their ability to penetrate deeper soil layers.
本研究通过 研究了烃类降解菌和有机物对受原油污染土壤的影响。处理包括两个水平的原油（3%和 6%w/w）、两个水平的城市垃圾堆肥（5%和 10%v/v）和两个不同的细菌菌株（ sp.141 和 sp. 27ps）。在生长期末，收获植物并准备进行实验室分析。在含有 10%堆肥、6%原油和 sp.141 的处理中观察到最多的石油降解菌（4.6×10 CFU/g 土壤）。在污染土壤中添加 10%堆肥、6%原油和 sp.141 时，记录到最高的原油降解率（76.49%）。对 C10-C35 化合物链降解的研究表明，在各种处理中，最丰富的化合物是碳原子较少的化合物（C12-C25），因此有机物的应用促进了原油的降解。总之， 幼苗在受生物因素（堆肥和 细菌）影响的受污染土壤修复中具有可接受的效率，这是因为它们对污染具有较高的耐受性和渗透更深土壤层的能力。
