Removal of PAHs with surfactant-enhanced soil washing: Influencing factors and removal effectiveness

• Published in: Chemosphere (Oxford) Vol. 82; no. 8; pp. 1173 - 1177
• Main Authors: Peng, Sheng, Wu, Wei, Chen, Jiajun
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.02.2011; Elsevier
• Subjects: Applied sciences; chemistry; Environmental Restoration and Remediation; Environmental Restoration and Remediation - methods; Exact sciences and technology; Influencing factors; laboratory techniques; methods; mixing; Pollution; polycyclic aromatic hydrocarbons; Polycyclic Aromatic Hydrocarbons - chemistry; Removal ratio; Soil; Soil - chemistry; Soil Pollutants; Soil Pollutants - chemistry; soil washing; Solubility; solubilization; Solubilization effectiveness; Surface-Active Agents; Surface-Active Agents - chemistry; Surfactant-enhanced soil washing; surfactants; temperature; washing; Water; Water - chemistry; Solubilization effectiveness; Removal ratio; Influencing factors; Surfactant-enhanced soil washing; Hydrocarbon; Surfactant; Polycyclic aromatic compound; Mutagen; Solubilization; Persistent organic pollutant; Carcinogen; Decontamination; Performance; Organic compounds
• ISSN: 0045-6535; 1879-1298; 1879-1298
• DOI: 10.1016/j.chemosphere.2010.11.076

► Six operative parameters are tested for their effects on PAH removal effectiveness in surfactant-enhanced soil washing. ► Stirring speed, washing time, surfactant concentration, and liquid/solid ratio show significant effect on removal, while temperature and on-and-off mode do not. ► A new parameter (solubilization percentage) is defined to evaluate the effectiveness of solubilization. PAH removal with surfactant enhanced washing was investigated through a series of laboratory tests to examine the effect of stirring speed, washing time, surfactant concentration, liquid/solid ratio, temperature, and on-and-off mode. The first four factors show significant influence on the PAH removal while the latter two do not. Total removal ratio and a new proposed parameter, solubilization percentage, are used to evaluate the effectiveness quantitatively.