Persistence of Polybrominated Diphenyl Ethers in Agricultural Soils after Biosolids Applications

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• 作者：Natasha A. Andrade ; Laura L. McConnell ; Alba Torrents ; Mark Ramirez
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2010
• 出版时间：March 10, 2010
• 年：2010
• 卷：58
• 期：5
• 页码：3077-3084
• 全文大小：873K
• 年卷期：v.58,no.5(March 10, 2010)
• ISSN：1520-5118

文摘

This study examines polybrominated diphenyl ethers (PBDE) levels, trends in biosolids from a wastewater treatment plant, and evaluates potential factors governing PBDE concentrations and the fate in agricultural soils fertilized by biosolids. The mean concentration of the most abundant PBDE congeners in biosolids (∑BDE-47, BDE-99, and BDE-209) generated by one wastewater treatment plant was 1250 ± 134 μg/kg d.w. with no significant change in concentration over 32 months (n = 15). In surface soil samples from the Mid-Atlantic region, average PBDE concentrations in soil from fields receiving no biosolids (5.01 ± 3.01 μg/kg d.w.) were 3 times lower than fields receiving one application (15.2 ± 10.2 μg/kg d.w.) and 10 times lower than fields that had received multiple applications (53.0 ± 41.7 μg/kg d.w.). The cumulative biosolids application rate and soil organic carbon were correlated with concentrations and persistence of PBDEs in soil. A model to predict PBDE concentrations in soil after single or multiple biosolids applications provides estimates which fall within a factor of 2 of observed values.