Use of Biodegradable Sorbents to the Decontamination of Polluted Soils
Abstract
The paper presents the decontamination of soils polluted with diesel, oils and other petroleum products. Soil decontamination is applied in-situ and ex-situ, depending on the surface and depth of the polluted area. The treatment time was 152 days, after which total hydrocarbon oil concentrations decreased for all experimental samples. The highest efficiency in reducing the concentration of petroleum products was in the case of samples treated with biodegradable sorbent and in the case of those treated with biodegradable sorbent mixture and biological sludge. Biodegradable non-waste materials have been used. The risk of migration of deep pollutants is low in the ex-situ version. Decontamination time is longer for high yields. In the case of older pollution, decontamination yields are low due to the presence of some 35% compounds, which do not migrate and are difficult to biodegrade under normal conditions.
References
[2]. ***, Order no. 756/1997 of MAPPM for the approval of the Regulation on the assessment of environmental pollution.
[3]. ***, Catalog of Romanian Standards, 2007.
[4]. ***, Methods of chemical soil analysis, Research Institute for Pedology and Agrochemistry, Bucharest, 1986.
[5]. Stroud J. L., Paton G. I., Semple K. T., Microbe-aliphatic hydrocarbon interactions in soil: implications for biodegradation and bioremediation, Journal of Applied Microbiology, UK, vol. 102, May 2007.
[6]. Chaerun Siti Khodijah, Asada Ryuji, Tazaki Kazue, Biodegradation of heavy oil from the Nakhodka oil spill by indigenous microbial consortia, International Journal of Applied Environmental Sciences, June 2007.
[7]. Jirasripongpun K., The characterization of oil-degrading microorganisms from lubricating oil contaminated soil, Journal of Applied Microbiology, UK, vol. 35, October 2002.
[8]. ***, http://www.ecologic.rec.ro/articol/read/stiintatehnologie/2138.
