Removal of pesticides from soil by supercritical extraction—a preliminary study

Abstract

The aim of this research project is to study the applicability of supercritical extraction with carbon dioxide to the decontamination of soils containing pesticides. In this work, after a brief but important introduction to the subject, the results of a preliminary study of the extraction of atrazine from sand with supercritical carbon dioxide are reported. These results, which were obtained with an extractor operated in batch mode, seem very promising, as a recovery of atrazine higher than 96% was obtained.

Polymer sequestrants for biological and environmental applications

“…Organic micropollulants include pesticides, pharmaceutical drugs, industrial chemicals and personal care products, and can have serious environmental and health effects including infertility and reproductive mutations in aquatic organisms, and neurological diseases and cancer in humans . Current extraction methods include bioremediation (the use of microorganisms to consume pollutants), physical remediation (clays, activated carbon, zeolites and surfactants) and chemical remediation (oxidation, UV treatment and supercritical extraction) . While these methods are effective, large‐scale application is challenging due to high cost and soil erosion .…”

Thermodynamic and kinetic study for subcritical water extraction of PAHs

“…The use of supercritical fluid extraction (SFE) has become increasingly apparent for cleaning organic contaminated soils such as polychlorinated biphenyls (PCBs) [3,4], PAHs [5,6], and pesticides [7][8][9]. Unfortunately, supercritical water requires a temperature of >374 8C and a pressure of >221 bar and is corrosive [10].…”

Remediation of PAHs contaminated soil by extraction using subcritical water

“…The use of supercritical fluid extraction (SFE) has become increasingly apparent when cleaning organic contaminated soils such as polychlorinated biphenyls (PCBs) [10,11], PAHs [12,13], and pesticides [14][15][16]. Unfortunately, supercritical water requires a temperature of 374 8C and a pressure of >221 bar and is corrosive [17].…”