USF St. Petersburg campus Faculty Publications
Organochlorine pesticides in soils of Mexico and the potential for soil-air exchange.
Document Type
Article
Publication Date
2010
ISSN
0269-7491
Abstract
The spatial distribution of organochlorine pesticides (OCs) in soils and their potential for soil–air exchange was examined. The most prominent OCs were the DDTs (Geometric Mean, GM = 1.6 ng g−1), endosulfans (0.16 ng g−1), and toxaphenes (0.64 ng g−1). DDTs in soils of southern Mexico showed fresher signatures with higher FDDTe = p,p′-DDT/(p,p′-DDT + p,p′-DDE) and more racemic o,p′-DDT, while the signatures in the central and northern part of Mexico were more indicative of aged residues. Soil–air fugacity fractions showed that some soils are net recipients of DDTs from the atmosphere, while other soils are net sources. Toxaphene profiles in soils and air showed depletion of Parlar 39 and 42 which suggests that soil is the source to the atmosphere. Endosulfan was undergoing net deposition at most sites as it is a currently used pesticide. Other OCs showed wide variability in fugacity, suggesting a mix of net deposition and volatilization.
Publisher
Pergamon Press
Recommended Citation
Wong, F., Alegria, H.A., & Bidleman, T.F. (2010). Organochlorine pesticides in soils of Mexico and the potential for soil-air exchange. Environmental Pollution, 158(3), 749-755. doi: 10.1016/j.envpol.2009.10.013.
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Comments
Abstract only. Full-text article is available through licensed access provided by the publisher. Published in Environmental Pollution, 158(3), 749-755. doi: 10.1016/j.envpol.2009.10.013. Members of the USF System may access the full-text of the article through the authenticated link provided.