• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Formation of PCDD/Fs and PCBs in the process of production of 1,4-dichlorobenzene
【2h】

Formation of PCDD/Fs and PCBs in the process of production of 1,4-dichlorobenzene

机译：1,4-二氯苯生产过程中PCDD / Fs和PCBs的形成

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The occurrence and distribution of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and polychlorinated biphenyls (PCBs) in a typical process of production of 1,4-dichlorobenzene (p-DCB) were investigated systematically in this study. P(5)CDFs and H(6)CDFs were the main congeners of PCDD/Fs, while only low levels of other PCDD/Fs were detected in the samples. The concentrations of PCBs were up to 4614ng/g in the semi-manufactured products, and 1797ng/g in the product p-DCB. It was also found that high chlorinated PCB congeners increased with the further chlorination. The levels of PCDD/Fs decreased obviously in the purification process, while PCBs could not be removed effectively. Polychlorophenols and other important dioxin precursors (1,4-dichloro-2-phenoxybenzene and 2-phenyl-2',5,5'-trichlorophenol) were also analyzed. Polychlorophenols which ortho- and para- positions of the hydroxyl were substituted by chlorine were the main congeners. In addition, a possible pathway of the formation of PCDD/Fs and PCBs in the production of p-DCB was presented. The results of this article suggest that re-estimation on the risk of using p-DCB products, especially the products for daily use such as mothballs, is expected. (C) 2004 Elsevier Ltd. All rights reserved.
机译：在本研究中，系统地研究了典型的1,4-二氯苯（p-DCB）生产过程中多氯二苯并对二恶英（PCDD），多氯二苯并呋喃（PCDF）和多氯联苯（PCB）的发生和分布。 P（5）CDF和H（6）CDF是PCDD / F的主要同源物，而样品中仅检测到少量的其他PCDD / F。半成品中的PCBs浓度最高为4614ng / g，p-DCB产品中的PCBs浓度最高为1797ng / g。还发现，随着进一步氯化，高氯化多氯联苯同源物增加。在纯化过程中，PCDD / Fs的含量明显降低，而PCB不能有效去除。还分析了多氯酚和其他重要的二恶英前体（1,4-二氯-2-苯氧基苯和2-苯基-2'，5,5'-三氯苯酚）。主要的同源物是羟基的邻位和对位被氯取代的多氯酚。另外，提出了在p-DCB生产中形成PCDD / F和PCB的可能途径。本文的结果表明，期望重新评估使用p-DCB产品的风险，尤其是日常使用的产品（如樟脑丸）。 （C）2004 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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