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BIOREMEDIATION OF OIL AND HEAVY METAL CONTAMINATED SOIL IN CONSTRUCTION SITES: A CASE STUDY OF USING BIOVENTING-BIOSPARGING AND PHYTOEXTRACTION TECHNIQUES
Eslami, E. and S.H.S. Joodat.
Cornell University, eprint arXiv:1806.03717, 2018

Activities at a construction site located in Garmdareh, Karaj, Iran, contaminated the site with BTEX, PAHs, and heavy metals. Coupled bioventing-biosparging and phytoextraction were implemented to remediate the deep and shallow layers of the contaminated site, respectively. The widespread presence of cement components (as dust, particles, and structures or large remnants) in the site affected the performance of bioremediation techniques. Results indicated that cement presence lowered the degradation rate of both BTEX (ethylbenzene) and PAH (pyrene) pollutants within deep layers. Conversely, the Pb removal rate increased during phytoextraction due to the stabilization effect of cement components on surficial soil. This study provides a critical view of the limitations and influential parameters of function-directed soil remediation techniques in the presence of cementitious materials in construction sites. https://arxiv.org/abs/1806.03717



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