Organic Matter Facies and Equilibrium Sorption of Phenanthrene
- 10 April 1999
- journal article
- research article
- Published by American Chemical Society (ACS) in Environmental Science & Technology
- Vol. 33 (10), 1637-1644
- https://doi.org/10.1021/es9806635
Abstract
Remediation of groundwater contamination in unconsolidated aquifers by dissolved hydrophobic compounds (HOC) requires detailed information on the sorption parameters present in the sediments. Equilibrium sorption isotherms were measured for phenanthrene for a wide variety of lithocomponents (constituents of sand and gravel sediments) and unweathered rock fragments (limestones and sandstones). The lithocomponents were separated based on macroscopic appearance of different lithologies (e.g. limestones, sandstones, shales, mudstones, and igneous rocks) and characterized in terms of organic carbon content and specific surface area. In addition the organic matter (OM) was characterized using coal petrography methods (white and UV light microscopy). As confirmed by heat-treated samples sorption was solely due to OM. Organic carbon normalized sorption coefficients (KOC) varied by almost 3 orders of magnitude among the samples investigated. The different origin and maturity of isolated organic matter (organic facies) is believed to be responsible. For example, extremely high KOC values were found for particulate organic matter such as charcoal and coal particles which were preserved within the sandstone and limestone grains. In a second paper we report data on sorption kinetics of the samples used in this study ( 1).Keywords
This publication has 26 references indexed in Scilit:
- Consensus on health risks from mercury exposure eludes federal agenciesEnvironmental Science & Technology, 1999
- AdvertisementEnvironmental Science & Technology, 1998
- Comment on "Thermodynamics of Organic Chemical Partition in Soils"Environmental Science & Technology, 1995
- A Distributed Reactivity Model for Sorption by Soils and Sediments. 3. Effects of Diagenetic Processes on Sorption EnergeticsEnvironmental Science & Technology, 1995
- Pleistocene Rhine gravel: deposits of a braided river system with dominant pool preservationGeological Society, London, Special Publications, 1993
- Influence of organic cosolvents on leaching of hydrophobic organic chemicals through soilsEnvironmental Science & Technology, 1987
- Effects of structural and compositional variations of dissolved humic materials on pyrene Koc valuesEnvironmental Science & Technology, 1987
- Influence of the nature of soil organics on the sorption of toluene and trichloroethyleneEnvironmental Science & Technology, 1986
- Safe handling of chemical toxicants and control of interferences in human tissue analysis for dioxins and furansEnvironmental Science & Technology, 1986
- Composition of fine particle regional sulfate component in Shenandoah ValleyEnvironmental Science & Technology, 1985