University of Maryland, Department of Civil and Environmental Engineering, 1153 Martin Hall University of Maryland, College Park, Maryland 20742-3021, USA.
J Agric Food Chem. 2010 Mar 10;58(5):3077-84. doi: 10.1021/jf9034496.
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 ( summation operatorBDE-47, BDE-99, and BDE-209) generated by one wastewater treatment plant was 1250 +/- 134 microg/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 microg/kg d.w.) were 3 times lower than fields receiving one application (15.2 +/- 10.2 microg/kg d.w.) and 10 times lower than fields that had received multiple applications (53.0 +/- 41.7 microg/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.
本研究考察了多溴二苯醚 (PBDE) 水平、污水处理厂生物固体中的趋势，并评估了控制 PBDE 浓度和在农业土壤中施用生物固体后命运的潜在因素。一个污水处理厂产生的生物固体中最丰富的 PBDE 同系物（∑BDE-47、BDE-99 和 BDE-209）的平均浓度为 1250±134μg/kg d.w.，在 32 个月内浓度没有明显变化（n=15）。在大西洋中部地区的表层土壤样本中，未施生物固体的农田土壤中的平均 PBDE 浓度（5.01±3.01μg/kg d.w.）比施用一次的农田低 3 倍（15.2±10.2μg/kg d.w.），比多次施用的农田低 10 倍（53.0±41.7μg/kg d.w.）。生物固体的累积施用量和土壤有机碳与土壤中 PBDE 的浓度和持久性相关。用于预测单次或多次生物固体施用量后土壤中 PBDE 浓度的模型提供的估计值与观察值相差 2 倍以内。
