Name: | Description: | Size: | Format: | |
---|---|---|---|---|
96.21 KB | Adobe PDF |
Advisor(s)
Abstract(s)
This work reports the study of the combination of soil vapor extraction (SVE) with bioremediation (BR) to
remediate soils contaminated with benzene. Soils contaminated with benzene with different water and
natural organic matter contents were studied. The main goals were: (i) evaluate the performance of SVE
regarding the remediation time and the process efficiency; (ii) study the combination of both technologies
in order to identify the best option capable to achieve the legal clean up goals; and (iii) evaluate the
influence of soil water content (SWC) and natural organic matter (NOM) on SVE and BR.
The remediation experiments performed in soils contaminated with benzene allowed concluding that:
(i) SVE presented (a) efficiencies above 92% for sandy soils and above 78% for humic soils; (b) and remediation
times from 2 to 45 h, depending on the soil; (ii) BR showed to be an efficient technology to complement
SVE; (iii) (a) SWC showed minimum impact on SVE when high airflow rates were used and led to
higher remediation times for lower flow rates; (b) NOM as source of microorganisms and nutrients
enhanced BR but hindered the SVE due the limitation on the mass transfer of benzene from the soil to
the gas phase.
Description
Keywords
Benzene Bioremediation Soil contamination Soil vapor extraction
Citation
Publisher
Elsevier