Реat-based ameliorants for purification of soil from oil pollutants
For intensification microbiological destruction of oil in in oil contaminated soils may use ecological ameliorant based on peat, it has good sorption properties and it is enriched active hydrocarbon oxidiring microorganisms. Rate of biodegradation in soil may defined by form and dose nitrogen fertilizer in consist of peat ameliorant. Laboratory trials revealed that the ameliorants which contain the peat and nitrogen and phosphorus fertilizers are able due to active stimulation of microflora to increase the rate of decomposition of oil in soil by 1.5-2.0 times. The influence of carbamide and ammonia nitrate contents and their ratios to others components on the rate of destruction of oil pollutants in soil have been studied. The most optimal kind of nitrogen fertilizer in composition of peat ameliorant is cаrbamide. Application of peat ameliorant with carbamide in comparison with ameliorant containing ammonium nitrate promote more active flow of microbiological and enzymatic process during the whole period of experiment. This factor serve higher ratio of destruction oil hydrocarbon. These ratios are 32.4 and 54.3% vs. 21.6 and 42.5% for 6 month of experiment. Changing of carboxylic group contains for 6 month of experiment argue about more significant oxidizing process, that it is passing in oil in case of using peat ameliorant. In these versions in comparison with version where ammonia nitrate are used, is marked lower content of carboxylic group. It is connected to further transformation of carboxylic acid into another oxygen-containing compound. In this case it has been reached maximum degree of paraffin- naphthenic hydrocarbon’s destruction - 2.6 vs. 1.9. The high initial dosage in content peat ameliorant of nitrogen fertilizer added to oil-contaminated soil don’t lead to maximal rate of oil carbon destruction. This rate is higher with more wide ratio C:N:P (863:1:1 in this case) and for 6 month experiment is 42.5 and 54.3% vs. 21.6 and 32.4% with C:N:P ratio equal to 20:1:0.15.
Keywords
нефть, почва, торф, мелиорант, ферменты, микроорганизмы, crude oil, soil, peat, ameliorant, ferments, microorganismsAuthors
Name | Organization | |
Alekseeva Tatyana P. | Siberian Research Institute of Agriculture and Peat of the Russian Academy of Agricultural Sciences (Tomsk) | burmistrova@sibniit.tomsknet.ru |
Burmistrova Tatyana I. | Siberian Research Institute of Agriculture and Peat of the Russian Academy of Agricultural Sciences (Tomsk) | burmistrova@sibniit.tomsknet.ru |
Stakhina Larisa D. | Institute of Petroleum Chemistry of the Siberian Branch of the Russian Academy of Sciences (Tomsk) | sl@ips.tsc.ru |
Tereshchenko Natalia N. | Siberian Research Institute of Agriculture and Peat of the Russian Academy of Agricultural Sciences (Tomsk); Tomsk State University | ternat@mail.ru |
References

Реat-based ameliorants for purification of soil from oil pollutants | Vestnik Tomskogo gosudarstvennogo universiteta. Biologiya - Tomsk State University Journal of Biology. 2013. № 2 (22).