10 research outputs found
Soil remediation via bioventing, vapor extraction and transition regime between vapor extraction and bioventing
The main objectives of this study were evaluation of the efficiencies of
bioventing (BV), soil vapor extraction (SVE) and transition regime between BV
and SVE (air injection bioventing [AIBV]) for benzene and toluene removal from
polluted sandy soils.
Materials and Methods: Laboratory-scale set-up consisted of three cylindrical
units (with 29 cm in length with a 7.29 cm i.d.) was conducted to study the
removal efficiency of three in-situ remediation technologies.
Results: The results showed that, after 48-h air injection with constant air flow
rate of 250 mL/min, benzene (initial concentration of 1 mg/g of soil) removal
efficiency in BV, SVE and AIBV reactors were almost 84, 98 and >99.5%,
respectively. Also results indicated that, toluene with a similar concentration was
successfully (>99.5%) reduced via AIBV technology, after 72-h continuous air
injection.
Conclusion: Comparison of the BV, SVE and AIBV technologies indicated that
all of those technologies are efficient for remediation of unsaturated zone, but
after specific remediation time frames, only AIBV able to support guide line
values and protect ground waters
Expression, régulation et fonctions de la "semicarbazide-sensitive amine oxidase" (SSAO) dans le tissu adipeux et la paroi vasculaire
PARIS-BIUSJ-Thèses (751052125) / SudocPARIS-BIUSJ-Physique recherche (751052113) / SudocSudocFranceF