Effect of ultrasound on removal of persistent organic pollutants (POPs) from different types of soils.
A new and promising technology is utilization of sonochemistry on decontamination of polluted soil. The feasibility of this technology on treatment of contaminated soils (synthetic clay, natural farm clay, and kaolin) was studied by using two target persistent organic pollutants (POPs): hexachlorobenzene (HCB) and phenanthrene (PHE). The soils were highly contaminated in 500 mg/kg. The laboratory experiments were conducted with various conditions (moisture, power, and time duration). The effects of these parameters on ultrasonication (as well as the removal of contaminants) were examined. The reasonable moisture ratio of the slurry could be in range of 2:1-3:1. The process did not change pH values of soils. Experimental results showed that ultrasonication has a potential to reduce the high concentrations of these POPs.
Shrestha
Reena Amatya
RA
University of Kuopio, Department of Environmental Sciences, Laboratory of Applied Environmental Chemistry, Patteristonkatu 1, 50100 Mikkeli, Finland. Reena.Shrestha@uku.fi
Pham
Thuy Duong
TD
Sillanpää
Mika
M
D000538:Aluminum Silicates / Q000032:analysis; D000077215:Clay; D052918:Environmental Restoration and Remediation; D005659:Fungicides, Industrial / Q000032:analysis; D006581:Hexachlorobenzene / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D007616:Kaolin / Q000032:analysis; D010616:Phenanthrenes / Q000032:analysis; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000528:radiation effects*; D013696:Temperature; D014465:Ultrasonics; D014867:Water / Q000032:analysis
D000538:Aluminum Silicates; D005659:Fungicides, Industrial; D010616:Phenanthrenes; D012987:Soil; D012989:Soil Pollutants; D014867:Water; D007616:Kaolin; D006581:Hexachlorobenzene; D000077215:Clay