At present in Japan, petroleum contaminated soils are disposed as wastes directly or after a incineration, otherwise left with no action. But, from the reasons of environmental concerns and the shortage of disposal sites, the remediation & recycling of them are strongly needed. Bioremediation is based on microbial degradation of organic contaminants and well known as useful for a petroleum remediation technique in USA. Soil washing is a water-based contaminants concentration/separation technique. Both techniques are cost effective and suitable for recycling of soil because soil functions could be kept intact after treatments. We operated a biopile system, which is known as a solid phase bioremediation, and demonstrated a biological degradation of oil in a petroleum contaminated soil, in which total petroleum hydrocarbon (TPH) in a soil decreased from 24,000 to 12,000 mg/kg for 84 days. A soil washing treatment of the same soil resulted more than 90 % of oil could be concentrated in 30% of the soil. When the same soil washing treatment was applied to the biopile treated soil, 80 % of the soil was remediated as a cleaner soil which contain TPH below 1,000 mg/kg. These effective methods are expected to be in practical use in Japan.
|Number of pages||12|
|Journal||Metallurgical Review of MMIJ (Mining and Metallurgical Institute of Japan)|
|Publication status||Published - 1998 Jul 1|
ASJC Scopus subject areas
- Metals and Alloys