• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Environmental Research and Public Health >Congener Profiles and Source-Wise Phase Partitioning Analysis of PCDDs/Fs and PCBs in Gyeonggi-Do Ambient Air, South Korea
【24h】

Congener Profiles and Source-Wise Phase Partitioning Analysis of PCDDs/Fs and PCBs in Gyeonggi-Do Ambient Air, South Korea

机译：韩国京畿道环境空气中PCDDs / Fs和PCBs的同类物分布图和信源相位划分分析

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The atmospheric concentrations and gas–particle partitioning of polychlorinated dibenzo-p-dioxins and furans (PCDDs/Fs) and polychlorinated biphenyls (PCBs) were investigated at two sites (Suwon and Ansan) in Gyeonggi-do, a heavily industrialized area of Korea, during the year 2010. The sum level (Σ17) of PCDDs/Fs and dioxin-like PCBs (dl-PCBs) in the ambient air at Suwon and Ansan ranged from 0.04 to 0.30 pg-TEQ·m?3 (geometric mean: 0.09 pg-TEQ·m?3) and 0.17 to 0.63 pg-TEQ·m?3 (geometric mean: 0.36 pg-TEQ·m?3), respectively. Moreover, the geometric mean concentrations of Σ180 PCBs at Suwon and Ansan were 233.6 pg·m?3 and 274.2 pg·m?3, respectively, and di-chlorinated biphenyls and tri-chlorinated biphenyls were the predominant homologs. Among the PCB congeners, 3,3'-dichlorobiphenyl (PCB-11) was the dominant species at both sites during all sampling periods, comprising up to 15.1% of Σ180 PCBs at Ansan and 24.6% at Suwon. We evaluated their gas-to-particle equilibriums by conducting regression between the particle–gas partition coefficient Kp (m3·ug?1) and the corresponding subcooled liquid vapor pressure (PL°). The slope (m) values for log–log plots of Kp vs. PL° were steeper in industrial areas owing to local source proximity. Moreover, owing to enhanced emissions from combustion-related sources at low temperatures, PCDD/Fs exhibited the largest deviation from the regression line of the particle–gas partition coefficient. Incinerators were found to be the primary emission source of atmospheric PCDDs/Fs, whereas re-evaporation from pre-existing environmental loads (e.g., storage areas or spilled soil and water bodies) was the dominant source for PCBs.
机译：在韩国重工业区京畿道的两个地点（水原和安山）调查了多氯联苯对二恶英和呋喃（PCDDs / Fs）和多氯联苯（PCBs）的大气浓度和气体颗粒分配，水原和安山的空气中PCDDs / Fs和二恶英类PCBs（dl-PCBs）的总水平（Σ17）为0.04到0.30 pg-TEQ·m？3（几何平均值：0.09） pg-TEQ·m≤3）和0.17至0.63 pg-TEQ·m≤3（几何平均值：0.36 pg-TEQ·m≤3）。此外，水原和安山的Σ180多氯联苯的几何平均浓度分别为233.6 pg·m？3和274.2 pg·m？3，并且主要是二氯联苯和三氯联苯。在多氯联苯同类物中，在所有采样期间，两个地点的3,3'-二氯联苯（PCB-11）是主要物种，在安山市Σ180PCBs中占15.1％，在水原市占24.6％。我们通过在颗粒-气体分配系数Kp（m3·ug？1）和相应的过冷液体蒸气压（PL°）之间进行回归来评估它们的气体-颗粒平衡。 Kp与PL°的对数-对数图的斜率（m）值在工业区中由于局部光源的接近而较陡。此外，由于低温下燃烧相关源的排放增加，PCDD / Fs与颗粒-气体分配系数回归线的偏差最大。人们发现焚化炉是大气中PCDDs / Fs的主要排放源，而先前存在的环境负荷（例如，存储区或溢出的土壤和水体）的再蒸发是PCBs的主要排放源。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号