« Previous AbstractDetermination of the Henry's law constants of low-volatility compounds via the measured air-phase transfer coefficients    Next AbstractMale-specific cuticular compounds of the six Drosophila paulistorum semispecies: structural identification and mating effect »

J Hazard Mater

Title:		Increase in volatilization of organic compounds using air sparging through addition in alcohol in a soil-water system
Author(s):		Chao HP; Hsieh LC; Tran HN;
Address:		"Department of Environmental Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan. Electronic address: hpchao@cycu.edu.tw. Department of Environmental Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan"
Journal Title:		J Hazard Mater
Year:		2018
Volume:		20171128
Issue:
Page Number:		942 - 949
DOI:		10.1016/j.jhazmat.2017.11.053
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"This study developed a novel method to promote the remediation efficiency of air sparging. According to the enhanced-volatilization theory presented in this study, selected alcohols added to groundwater can highly enhance the volatilization amounts of organic compounds with high Henry's law constants. In this study, the target organic compounds consisted of n-hexane, n-heptane, benzene, toluene, 1,1,2-trichloroethane, and tetrachloroethene. n-pentanol, n-hexanol, and n-heptanol were used to examine the changes in the volatilization amounts of organic compounds in the given period. Two types of soils with high and low organic matter were applied to evaluate the transport of organic compounds in the soil-water system. The volatilization amounts of the organic compounds increased with increasing alcohol concentrations. The volatilization amounts of the test organic compounds exhibited a decreasing order: n-heptanol>n-hexanol>n-pentanol. When 10mg/L n-heptanol was added to the system, the maximum volatilization enhancement rate was 18-fold higher than that in distilled water. Samples of soil with high organic matter might reduce the volatilization amounts by a factor of 5-10. In the present study, the optimal removal efficiency for aromatic compounds was approximately 98%"
Keywords:		Air sparging Alcohol Soil organic matter Volatilization;
Notes:		"PubMed-not-MEDLINEChao, Huan-Ping Hsieh, Lin-Han Chiang Tran, Hai Nguyen eng Netherlands 2017/12/05 J Hazard Mater. 2018 Feb 15; 344:942-949. doi: 10.1016/j.jhazmat.2017.11.053. Epub 2017 Nov 28"