Desorption of pentachlorophenol from soils using mixed solvents

Journal Article · Wed Dec 15 04:00:00 EST 1999 · Environmental Science and Technology

DOI:https://doi.org/10.1021/es980759z· OSTI ID:20006580

Khodadoust, A P; Suidan, M T; Sorial, G A; Dionysiou, D D; Brenner, R C

Desorption of pentachlorophenol (PCP) from contaminated soils in mixed solvents of water and ethanol was investigated using desorption isotherm experiments. The following cosolvent volume fractions of ethanol in the mixed solvent were considered: 0.03, 0.56, 0.79. 0.95, and 1.0. Three fractions of a synthetic soil (Edison soil) with approximately 1% organic matter were the main soils used in this study in addition to K-10 montmorillonite clay and Ottawa sand. The effect of soil organic matter and soil surface area on desorption in mixed solvents was evaluated. Analysis of desorption data revealed that PCP desorption increased with PCP solubility in mixed solvent up to 0.79, 0.95, and 0.56 fraction ethanol for Edison soil, K-10 montmorillonite, and Ottawa sand, respectively. Lower desorption of PCP from Edison soil in solvents with more than 0.79 fraction ethanol resulted from interactions between solvent and soil organic matter. For Edison soil, highest PCP desorption in all mixed solvents was obtained for the soil fraction with the smallest surface area. Desorption of PCP in mixed solvents containing more than 0.79 fraction ethanol was lower for soils with organic matter than for other soils.

• Research Organization: Univ. of Cincinnati, OH (US)
• OSTI ID: 20006580
• Journal Information: Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 24 Vol. 33; ISSN ESTHAG; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CHLORINATED AROMATIC HYDROCARBONS
DESORPTION
REMEDIAL ACTION
SOILS
SOLVENT EXTRACTION