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Natural attenuation of MTBE and BTEX compounds in a petroleum contaminated coastal aquifer in the Tel-Aviv area was investigated.
Significant decrease in MTBE concentration and complete disappearance of BTEX compounds occur within 100 m groundwater flow.
Highly anaerobic conditions were determined in the close vicinity to the spill source. In order to examine the contribution
of microbial degradation to the attenuation process at anaerobic conditions, compound-specific carbon isotope ratio analysis
was employed. Carbon isotope enrichment of toluene up to 2.4% along with the drop in its concentration up to 80% was observed
within 20 cm below the water table. The lack of isotope fractionation despite the significant concentration decrease for other
studied compounds indicates significant contribution of abiotic processes to the natural attenuation. 相似文献
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