Because of its volatile nature, TCE migrates from contaminated water into the vadose zone via the soil gas, and may infiltrate below grade basements which normally exist under negative pressure. The experiments described in this dissertation were designed to simulate this process, and study the ...
the soil must be heated to increase the effectiveness of VOC removal by raising pressure in the contaminants. By using a vacuum on vadose zone wells, contaminated vapor is collected from the soil. The vapors are subsequently treated or destroyed aboveground to prevent pollutants from entering the ...
To form SiNWs, Si samples are first cleaned, and they were immersed into an etching solution containing AgNO3 solution (0.020 M), aqueous HF solution (40%) and H2O2 (10 M) at room temperature and atmospheric pressure, under the dark during 30 min. After etching, we immerse Petroleum ...
In brief, the reactor is directly attached to an ultra-high vacuum system with XPS (Multiprobe system, Omicron Nanotechnology, base pressure 10−10 mbar) and allows for contamination-free transfer of a sample from the reactor to the XPS after any stage of deposition. Apart from the water...
Herein, we developed a low-pressure chemical vapor deposition (LP-CVD) method to grow monolayer Mo1−xWxS2 (x = 0–1) 2D crystals with a wide range of Mo/W ratios. Raman spectroscopy and high-resolution transmission electron microscopy demonstrate the homogeneous mixture of Mo and W ...
This correlation was observed with a predictable daily frequency even for very slight diurnal changes in barometric pressure and associated pressure differentials measured between subslab and indoor regimes and suggests that advective vapor transport and intrusion can result in elevated indoor TCE ...
building pressure controlmitigation designSome investigations into the origin and concentration of volatile organic compounds (VOCs) in indoor air need to be completed in days or weeks rather than months or seasons; examples include property transactions and short-duration exposures to trichloroethene (...
As such, these findings demonstrate that continuous monitoring of concentration and parameters such as differential pressure and determination of a time‐weighted concentration average over a selected duration when upward advective flux is occurring can allow for a realistic RME‐based risk estimate....
These two gas streams were mixed rapidly, reacted, and aerosol was cooled by a water jacket tube and filtered at the feoxrimt oefdthZerOre2aNctPosr at atmospheric pressure. for analysis, followed by winatoshfilnagk.eTs hatredeifsfaemrepnltecsoomf ZprrOes2siNoPnsfowrecree(s2y,n3t,h6e,si...
In the reactions between gaseous SnO and FeOx, Kθ is equal to the reciprocal of the standard vapor pressure of gaseous SnO. Then, gas-phase equilibrium diagram of FeOx under different SnO partial pres- sure was calculated and plotted in Fig. 8. hapBpaesneeddoanndthaellrethsuelrtesaic...