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J Hazard Mater

Title:		Effect of aggregate structure on VOC gas adsorption onto volcanic ash soil
Author(s):		Hamamoto S; Seki K; Miyazaki T;
Address:		"Division of Environmental Science and Infrastructure Engineering, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan. s07de004@mail.saitamta-u.ac.jp"
Journal Title:		J Hazard Mater
Year:		2009
Volume:		20081114
Issue:		1
Page Number:		207 - 212
DOI:		10.1016/j.jhazmat.2008.11.008
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"The understanding of the gaseous adsorption process and the parameters of volatile organic compounds such as organic solvents or fuels onto soils is very important in the analysis of the transport or fate of these chemicals in soils. Batch adsorption experiments with six different treatments were conducted to determine the adsorption of isohexane, a gaseous aliphatic, onto volcanic ash soil (Tachikawa loam). The measured gas adsorption coefficient for samples of Tachikawa loam used in the first three treatments, Control, AD (aggregate destroyed), and AD-OMR (aggregate destroyed and organic matter removed), implied that the aggregate structure of volcanic ash soil as well as organic matter strongly enhanced gas adsorption under the dry condition, whereas under the wet condition, the aggregate structure played an important role in gas adsorption regardless of the insolubility of isohexane. In the gas adsorption experiments for the last three treatments, soils were sieved in different sizes of mesh and were separated into three different aggregate or particle size fractions (2.0-1.0mm, 1.0-0.5mm, and less than 0.5mm). Tachikawa loam with a larger size fraction showed higher gas adsorption coefficient, suggesting the higher contributions of macroaggregates to isohexane gas adsorption under dry and wet conditions"
Keywords:		Adsorption Air Pollution/*prevention & control Gases/chemistry/*isolation & purification Hexanes/*isolation & purification Organic Chemicals/chemistry/*isolation & purification Particle Size Soil *Volcanic Eruptions;
Notes:		"MedlineHamamoto, Shoichiro Seki, Katsutoshi Miyazaki, Tsuyoshi eng Netherlands 2009/01/07 J Hazard Mater. 2009 Jul 15; 166(1):207-12. doi: 10.1016/j.jhazmat.2008.11.008. Epub 2008 Nov 14"