Author/Authors :
Asgharnia، Hosseinali نويسنده Assistant Professor, Department of Environmental Health Engineering, Faculty of Paramedical Sciences,Babol University of Medical Sciences , , Jonidi Jafari، Ahmad نويسنده Department of Occupational and Environment Health, Medical Sciences, Tarbiat Modares University, Tehran, Iran. , , Rezaei Kalantary، Roshanak نويسنده Department of Environmental Health, School of Health, Tehran University of Medical Sciences, Tehran, Iran. Rezaei Kalantary, Roshanak , Nasseri، Simin نويسنده 1Department of Environmental Health Engineering, School of Public Health and Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran , , Mahvi، Amirhossein نويسنده 1Center for Environmental Research and Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran,2National Institute of Health Research, Ministry of Health, Tehran, Iran , , Yaghmaeian، Kamyar نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , , Esrafili، Ali نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , , Dadban Shahamat، Yousef نويسنده 1Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran ,
Abstract :
Background: Use of earthworm to eliminate the phenanthrene from the soil (bioaccumulation) is developed as an
economical method. Bioaugmentation of microorganism was used for promotion of bioaccumulation by
earthworm. The aim of this study was to determine the bioaccumulation or biodegradation of phenanthrene by
Eisenia fetida and bacterial consortium in polluted soil.
Methods: The amount of 0.4 kg of the polluted soil in the ratio of 10 and 30 mg phenanthrene per kg of dry soil
was transferred into each pot. Afterwards, bacteria and earthworms were added to each pot in separate and
combination. The samples were kept under field conditions, and the retention concentrations of phenanthrene
were analyzed after 8 weeks.
Results: Results showed that the Eisenia fetida was able to significantly remove phenanthrene from the polluted
soil samples. Bioaccumulation and bioaugmentation alone have the removal efficiency of 60.24% and 50.3%,
respectively. In the combined mode, phenanthrene removal efficiency was 63.81%.
Conclusions: The current study indicated that the use of earthworms, could improve both phenanthrene
bioavailability and microbial activity, which led to enhancing removal of carbon-based pollutants.
