A.J. Acher

Agricultural Research Organization ARO, Beit Dajan, Central District, Israel

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Publications (2)5.77 Total impact

  • A.J. Acher, P. Boderie, B. Yaron
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    ABSTRACT: A laboratory study of soil contamination by a synthetic “kerosene” is reported. Soil (Mediterranean red sandy clay) samples with different moisture contents (0.0, 0.8, 4.0, and 12%, w/w) were contaminated by vapors and/or liquid from a mixture containing 5 kerosene components (m-xylene, pseudo-cumene, t-butylbenzene, n-decane and n-dodecane). The contribution of the different kerosene components to the adsorption, volatilization and transport processes is described. Vapor adsorption was found to be dependent on the vapor concentration of each component (except for the n-decane), and on the soil moisture content. The sorption coefficients of the kerosene components decreased with increasing temperature but showed only a very slight variability between 20 and 34°C, in air-dried soil. The volatilization from soil was high: more than 90% of the aromatic components were desorbed in less than 2 h. The transport of the kerosene, in liquid and vapor phases, through the soil columns, was studied using amounts of kerosene which were less (1 mL) or more (10 mL) than the retention capacity of the soil columns. The increase in the moisture content of the soil increased the rate and the depth of kerosene downward penetration. It stopped however, the vapor movement (at 4%) and the upward liquid movement (at 12%). Among the properties of the kerosene components, volatility seems to be the prime factor which determines kerosene movement once liquid phase movement has ceased.
    Journal of Contaminant Hydrology 09/1989; 4(4):333–345. · 2.89 Impact Factor
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    ABSTRACT: Adsorption and desorption of vapor hydrocarbons from a synthetic “kerosene” source on different soils was studied. The “kerosene” used consisted of a mixture containing 20% aromatic components (m-xylene, n-butylbenzene, ps-cumene) and 80% aliphatic components (n-decane, n-dodecane). Three different types of soils were used: Mediterranean red sandy clays, arid brown loessial silty loam and Evesham clay. The most influential parameter in the adsorption-desorption processes was the moisture content, which was examined over a range from oven dry to −1 bar water pressure (70% field capacity). The highest adsorption values were on the arid brown loessial silty loam soil, having the following order of adsorption: n-decane > m-xylene > ps-cumene > n-butylbenzene > n-dodecane. From the “kerosene” components the fastest desorption rate was exhibited by m-xylene and the slowest by n-dodecane, in all the soil studied.
    Journal of Contaminant Hydrology 01/1989; 4(4):347-358. · 2.89 Impact Factor