AIR MIGRATION AND CHANGE OF CONTAMINANT CONCENTRATION IN GROUNDWATER INDUCED BY IN SITU AIR SPARGING
نویسندگان
چکیده
منابع مشابه
Effect of Temporal Changes in Air Injection Rate on Air Sparging Performance Groundwater Remediation.
Air sparging (AS) is a commonly applied method for treating groundwater contaminated with volatile organic compounds (VOCs). When using a constant injection of air (continuous mode), a decline in remediation efficiency is often observed, resulting from insufficient mixing of contaminants at the pore scale. It is well known that turning the injection on and off (pulsed mode) may lead to a better...
متن کاملRemediation of Chlorinated Solvent Plumes Using In-Situ Air Sparging—A 2-D Laboratory Study
In-situ air sparging has evolved as an innovative technique for soil and groundwater remediation impacted with volatile organic compounds (VOCs), including chlorinated solvents. These may exist as non-aqueous phase liquid (NAPL) or dissolved in groundwater. This study assessed: (1) how air injection rate affects the mass removal of dissolved phase contamination, (2) the effect of induced ground...
متن کاملIn-Situ Remediation of Mixed Radioactive Tank Waste, Via Air Sparging and Poly-Acrylate Solidification
This paper describes remediation activities performed in accordance with the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) on an underground storage tank (UST) from the Idaho National Laboratory’s Test Area North (TAN) complex. The UST had been used to collect radioactive liquid wastes from and for the TAN evaporator. Recent analyses had found that the residual w...
متن کاملEffect of groundwater flow on remediation of dissolved-phase VOC contamination using air sparging.
This paper presents two-dimensional laboratory experiments performed to study how groundwater flow may affect the injected air zone of influence and remedial performance, and how injected air may alter subsurface groundwater flow and contaminant migration during in situ air sparging. Tests were performed by subjecting uniform sand profiles contaminated with dissolved-phase benzene to a hydrauli...
متن کاملMathematical Modeling of Natural in Situ Bioremediation to Estimate Initial Contaminant Concentration Effect
A mathematical model has been simulated to describe natural in situ bioremediation of contaminated soil. The model equations consist of a system of three non-linear partial differential equations. Sensitivity analysis conducted by numerically solving them, has demonstrated the effect of initial contaminant concentration on the time and mechanism of remediation. The result of simulation indicate...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: PROCEEDINGS OF HYDRAULIC ENGINEERING
سال: 1998
ISSN: 0916-7374,1884-9172
DOI: 10.2208/prohe.42.349