Distribution of Aged 14C−PCB and 14C−PAH Residues in Particle-Size and Humic Fractions of an Agricultural Soil
- 5 August 2005
- journal article
- research article
- Published by American Chemical Society (ACS) in Environmental Science & Technology
- Vol. 39 (17), 6575-6583
- https://doi.org/10.1021/es050523c
Abstract
Organic matter is considered to be the single most important factor limiting availability and mobility of persistent organic pollutants (POPs) in soil. This study aimed to characterize the distribution of 14C−PCB (congeners 28 and 52) and 14C−PAH (fluoranthene and benzo[a]pyrene) residues in an Orthic Luvisol soil obtained from two lysimeter studies initiated in 1990 at the Agrosphere Institute (Forschungszentrum Jülich GmbH, Germany). The lysimeter soils contained a low-density OM fraction, isolated during soil washing, which contained a significant fraction (3−12%) of the total 14C-activity. Soils were also fractionated according to three particle sizes: >20, 20−2, and (20 μm) for the PCBs. Relative affinity values of 14C-activity for the different particle sizes varied in the order 20−2 μm > ( (>20 μm) for the PAHs. The distribution of 14C−PCB or 14C−PAH residues in the organic and inorganic matrixes of the particle-size fractions was determined using methyl isobutyl ketone (MIBK). 14C−PCB and 14C−PAH-associated activities were primarily located in the humin fraction of the 20−2 and 14C-activity with the mineral fraction following MIBK separation of the humic fractions, ranging between 8 and 52% for 14C−PCBs and 57−80% for 14C−PAHs. The mineral (inorganic) component of the soils apparently played a significant (previously unreported) role in the sequestration of both PCBs 28 and 52 and the PAHs fluoranthene and benzo[a]pyrene.This publication has 14 references indexed in Scilit:
- Influence of plants on the chemical extractability and biodegradability of 2,4-dichlorophenol in soilEnvironmental Pollution, 2005
- Soils as filter and buffer for pesticides—experimental concepts to understand soil functionsEnvironmental Pollution, 2005
- Sorption Strength of Persistent Organic Pollutants in Particle‐size Fractions of Urban SoilsSoil Science Society of America Journal, 2002
- Effect of soil structure on the bioavailability of polycyclic aromatic hydrocarbons within aggregates of a contaminated soilApplied Geochemistry, 2001
- POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) AND POLYCHLORINATED BIPHENYLS (PCBS) IN PARTICLE-SIZE SEPARATES OF URBAN SOILS IN BANGKOK, THAILANDSoil Science, 2000
- Experimental approaches and analytical techniques for determining organic compound bound residues in soil and sedimentEnvironmental Pollution, 2000
- Formation and long-term fate of non-extractable residues in outdoor lysimeter studiesEnvironmental Pollution, 2000
- Reduced Pyrene Bioavailability in Microbially Active SoilsEnvironmental Science & Technology, 1998
- THE EFFECT OF SEQUENTIAL REMOVAL OF ORGANIC MATTER ON THE SURFACE MORPHOLOGY OF HUMINSoil Science, 1997
- Effect of Aging of Chemicals in Soil on Their Biodegradability and ExtractabilityEnvironmental Science & Technology, 1995