State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
Sci Total Environ. 2014 Jan 1;466-467:524-32. doi: 10.1016/j.scitotenv.2013.07.058. Epub 2013 Aug 10.
Polybrominated diphenyl ethers (PBDEs), a group of persistent organic pollutants (POPs), are caused for concern recently due to their adverse health effects and environmental ubiquity. In this study, atmospheric and soil PBDE levels in Taizhou, one of the largest WEEE dismantling areas in the world, were measured, ranging from 884 to 2791 pg m(-3) with an average of 1968 pg m(-3) for atmosphere and 2.96 to 200 ng g(-1)dry weight (dw) with the mean of 65.2 ng g(-1)dw for farmland soils, respectively. The close connection between soil PBDE accumulation and atmospheric deposition was also revealed by the estimation of the annual PBDE deposition flux (3.1 ± 0.9 mg m(-2)a(-1)) and the similarity between deposited congener pattern and soil congener profile. Positive matrix factorization (PMF) was conducted to extract possible sources of farmland soil PBDEs and to calculate their contributions. Based on the measured source profiles of PBDE-related activities, five sources were identified representing WEEE dumping, WEEE dismantling, WEEE open burning, residential waste dismantling, and residential waste open burning. WEEE-related recycling activities contributed primary percentage (52%) to farmland soil PBDE concentration, and open burning was an important pathway for PBDEs entering the environment.
多溴联苯醚（PBDEs）是一组持久性有机污染物（POPs），由于其对健康的不良影响和环境普遍性而引起关注。在这项研究中，测量了世界上最大的电子废物拆解区之一台州的大气和土壤中的 PBDE 水平，分别为 884 到 2791 pg m(-3)，平均为 1968 pg m(-3)的大气和 2.96 到 200 ng g(-1)干重（dw），农田土壤中平均值为 65.2 ng g(-1)dw。通过估算每年的 PBDE 沉积通量（3.1 ± 0.9 mg m(-2)a(-1)）和沉积同系物模式与土壤同系物分布的相似性，揭示了土壤 PBDE 积累与大气沉积之间的密切联系。正矩阵因子化（PMF）用于提取农田土壤 PBDE 的可能来源，并计算它们的贡献。基于测量的与 PBDE 相关活动的源分布，确定了五个来源，分别代表电子废物倾倒、电子废物拆解、电子废物露天焚烧、住宅废物拆解和住宅废物露天焚烧。与电子废物相关的回收活动对农田土壤 PBDE 浓度的主要贡献（52%），露天焚烧是 PBDEs 进入环境的重要途径。
