| 应用环境多介质逸度模型研究废旧电器拆解区多溴联苯醚的迁移及归趋 |
| 摘要点击 3217 全文点击 1463 投稿时间：2016-04-20 修订日期：2016-06-29 |
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| 中文关键词 多溴联苯醚(PBDEs) 多介质逸度模型 废旧电器拆解区域 迁移 归趋 |
| 英文关键词 polybrominated diphenyl ethers(PBDEs) multimedia fugacity model electrical equipment dismantlingarea transfer fate |
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| 中文摘要 |
| 利用Level（Ⅲ）逸度模型模拟了浙东某废旧电器拆解区域多溴联苯醚（PBDEs）3种同系物在大气、水体、土壤和沉积物中的分布及迁移通量.在稳态假设条件下3种PBDEs同系物在环境介质中浓度的模型模拟值与实测值吻合较好，验证了模型的可靠性，通过参数灵敏度分析表明PBDEs的基本性质如蒸气压、正辛醇/水分配系数、在介质中的半衰期是影响化合物在环境相中浓度分布的主要因素.研究发现，在废旧电器拆解区大气中PBDEs对下风向的地区可能造成一定程度的污染；当环境系统达到平衡时，在废旧电器拆解区PBDEs主要蓄积在土壤和沉积物中，占所有环境介质中PBDEs的95%以上，土壤和沉积物是PBDEs污染的重要二次污染源；PBDEs在介质间的迁移以大气-土壤和水体-沉积物途径为主；废旧电器拆解区土壤中降解是PBDEs在环境中消减最主要途径.研究结果将为废旧电器拆解区PBDEs污染的风险评估和控制提供依据. |
| 英文摘要 |
| The multimedia fugacity model (Ⅲ) was used to simulate the distribution, transfer and fate of typical polybrominated diphenyl ethers (PBDEs) in air, water, soil and sediment in an electrical equipment dismantling area in eastern China. The modeling data were compared with monitored values in air, soil and sediment for validation purpose. Moreover, the transfer fluxes between different compartments were analyzed in order to infer the main transfer process. Parameters of the model were tested and the key parameters were identified using sensitivity analysis method for BDE47 and BDE209.The results of sensitivity analysis indicated that vapor pressure, the lgKow value and half-life had significant influence on concentrations of PBDEs in different media. The results showed that when the system reached equilibrium, most of the PBDEs would be accumulated in soil and sediment. The air advection outflow and soil degradation were the major routes for PBDEs to disappear in the area. The results will provide the basis for the risk management of PBDEs contamination. |
