...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Pollution >PBDE emission from E-wastes during the pyrolytic process: Emission factor, compositional profile, size distribution, and gas-particle partitioning
【24h】

PBDE emission from E-wastes during the pyrolytic process: Emission factor, compositional profile, size distribution, and gas-particle partitioning

机译：热解过程中电子废物的多溴二苯醚排放：排放因子，成分分布，尺寸分布和气体颗粒分配

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Polybrominated diphenyl ether (PBDE) pollution in E-waste recycling areas has garnered great concern by scientists, the government and the public. In the current study, two typical kinds of E-wastes (printed wiring boards and plastic casings of household or office appliances) were selected to investigate the emission behaviors of individual PBDEs during the pyrolysis process. Emission factors (EFs), compositional profile, particle size distribution and gas-particle partitioning of PBDEs were explored. The mean EF values of the total PBDEs were determined at 8.1 +/- 4.6 mu g/g and 10.4 +/- 11.3 mu g/g for printed wiring boards and plastic casings, respectively. Significantly positive correlations were observed between EFs and original addition contents of PBDEs. BDE209 was the most abundant in the E-waste materials, while lowly brominated and highly brominated components (excluding BDE209) were predominant in the exhaust fumes. The distribution of total PBDEs on different particle sizes was characterized by a concentration of finer particles with an aerodynamic diameter between 0.4 mu m and 2.1 mu m and followed by less than 0.4 mu m. Similarly, the distribution of individual species was dominated by finer particles. Most of the freshly emitted PBDEs (via pyrolysis) were liable to exist in the particulate phase with respect to the gaseous phase, particularly for finer particles. In addition, a linear relationship between the partitioning coefficient (K-p) and the subcooled liquid vapor pressure (P-L(O)) of the different components indicated non-equilibrium gas-particle partitioning during the pyrolysis process and suggested that absorption by particulate organic carbon, rather than surface adsorption, governed gas-particle partitioning. (C) 2017 Elsevier Ltd. All rights reserved.
机译：电子废物回收地区的多溴联苯醚（PBDE）污染引起了科学家，政府和公众的极大关注。在当前的研究中，选择了两种典型的电子废物（印刷线路板和家用电器或办公室用具的塑料外壳）来研究单个多溴二苯醚在热解过程中的排放行为。研究了多溴二苯醚的排放因子（EFs），成分分布，粒径分布和气体颗粒分配。对于印刷线路板和塑料外壳，总多溴二苯醚的平均EF值分别确定为8.1 +/- 4.6μg / g和10.4 +/- 11.3μg / g。 EF与多溴二苯醚的原始添加量之间存在显着的正相关。 BDE209是电子废物中含量最丰富的，而低溴和高溴化成分（不包括BDE209）在废气中占主导地位。 PBDEs在不同粒径上的分布特征是空气动力学直径在0.4微米至2.1微米之间且随后小于0.4微米的较细颗粒的浓度。同样，单个物种的分布也以较细的颗粒为主。相对于气相，大多数新鲜散发的多溴二苯醚（通过热解）易于存在于颗粒相中，特别是对于较细的颗粒。此外，不同组分的分配系数（Kp）与过冷液体蒸气压（PL（O））之间存在线性关系，这表明在热解过程中气态颗粒分配不均衡，这表明有机碳被颗粒状碳吸收，而不是表面吸附，而是控制气体颗粒的分配。 （C）2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Environmental Pollution》 |2018年第4期|419-428|共10页
  • 作者

    Cai ChuanYang; Yu ShuangYu; Liu Yu; Tao Shu; Liu WenXin;

  • 作者单位

    Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China;

    Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China;

    Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China;

    Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China;

    Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    PBDEs; E-wastes; Pyrolytic process; Emission factor; Partitioning behaviors;

    机译：多溴联苯醚;电子废物;热解过程;排放因子;分配行为;

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