Journal
ENVIRONMENTAL POLLUTION
Volume 157, Issue 11, Pages 2928-2932Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2009.07.007
Keywords
Organic contaminants; Pesticides; Productive soils; Soil contamination intensity; Soil organic matter; Crop contamination
Categories
Funding
- National Science Council of Taiwan [NSC 96-2621-Z-006-016, NSC 97-2221-E-006-039-MY2]
- National Cheng Kung University Landmark Project [B-020]
- National Natural Science Foundation of China [20688702, 40763001]
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Concentrations of organic contaminants in common productive soils based on the total soil mass give a misleading account of actual contamination effects. This is attributed to the fact that productive soils are essentially water-saturated, with the result that the soil uptake of organic compounds occurs principally by partition into the soil organic matter (SOM). This report illustrates that the soil contamination intensity of a compound is governed by the concentration in the SOM (C-om) rather than by the concentration in whole soil (C-s). Supporting data consist of the measured levels and toxicities of many pesticides in soils of widely differing SOM contents and the related levels in in-situ crops that defy explanation by the C-s values. This SOM-based index is timely needed for evaluating the contamination effects of food crops grown in different soils and for establishing a dependable priority ranking for intended remediation of numerous contamination sites. Published by Elsevier Ltd.
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