Search Result
Technology Innovation News Survey Feed (RSS)
LAB-SCALE REMOVAL OF PAHS IN CONTAMINATED SOIL USING ELECTRICAL RESISTANCE HEATING: REMOVAL EFFICIENCY AND ALTERATION OF SOIL PROPERTIES
Han, Z., W. Jiao, Y. Tian, J. Hu, and D. Han.
Chemosphere 239:124496(2020)
This study used a lab-scale electrical resistance heating (ERH) equipment to investigate the influence factors of ERH, PAH removal efficiency, and changes in soil properties through the treatment process. Results suggested that moisture and salinity were basic factors affecting electric conductive capability; heating 15 g of soil to the target temperature required at least 4 g solution of 0.1% salt. Higher electric strength ensured heating efficiency and maximum temperature. The removal efficiency of PAHs was significantly affected by its benzene rings and bond structure; during 90 min ERH treatment, more than 40% of the pollutants were removed synchronously with the evaporation of water. Co-boiling with water was confirmed to be the primary mechanism of ERH. The influence of the treatment on soil properties (organic matter, particle size, fertility, enzymatic activity) was limited, suggesting that soil functionality can be retained by ERH.
Chemosphere 239:124496(2020)
This study used a lab-scale electrical resistance heating (ERH) equipment to investigate the influence factors of ERH, PAH removal efficiency, and changes in soil properties through the treatment process. Results suggested that moisture and salinity were basic factors affecting electric conductive capability; heating 15 g of soil to the target temperature required at least 4 g solution of 0.1% salt. Higher electric strength ensured heating efficiency and maximum temperature. The removal efficiency of PAHs was significantly affected by its benzene rings and bond structure; during 90 min ERH treatment, more than 40% of the pollutants were removed synchronously with the evaporation of water. Co-boiling with water was confirmed to be the primary mechanism of ERH. The influence of the treatment on soil properties (organic matter, particle size, fertility, enzymatic activity) was limited, suggesting that soil functionality can be retained by ERH.
The Technology Innovation News Survey welcomes your comments and
suggestions, as well as information about errors for correction. Please
contact Michael Adam of the U.S. EPA Office of Superfund Remediation
and Technology Innovation at adam.michael@epa.gov or (703) 603-9915
with any comments, suggestions, or corrections.
Mention of non-EPA documents, presentations, or papers does not constitute a U.S. EPA endorsement of their contents, only an acknowledgment that they exist and may be relevant to the Technology Innovation News Survey audience.
