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...

Abstract Novel approaches for monitoring coastal water quality changes and identifying associated contaminant source(s) are of growing importance as climate change population redistribution to zones continue impact systems. CrAssphage, a virus found in the human gut shed with fecal matter, is currently gaining popularity an indicator contamination surface groundwater. Here we demonstrate that D...

For clear residential indoor pollutant concentration under different ventilation modes and contaminant distribution, to explore the emission efficiency of way, choose suitable way ventilation, season in Shenyang, this article selects some typical residence as research object, interior decoration materials commonly used source, based on CFD fluid mechanics principle, Airpak3.0.16 software was si...

A new configuration of the passive fluxmeter (PFM) is presented that provides for simultaneous measurements of both the magnitude and the direction of ambient groundwater specific discharge qo and Cr(VI) mass flux J(Cr). The PFM is configured as a cylindrical unit with an interior divided into a center section and three outer sectors, each packed with a granular anion exchange resin having high...

This paper deals with numerical study of semi-finite incompressible flow of air over two blocks with different heights in the presence of a condensing-source, dispensing- contaminant in the flow, in both steady and unsteady states. The numerical solution of governing PDE equations are constructed by a finite-volume method applied on structured grid arrangement. The effects of air flow velocity,...