Unexpected promotion of PCDD/F formation by enzyme-aided Cl-2 bleaching in non-wood pulp and paper mill
文献类型：期刊论文
| 作者 | Guo, Li; Huang, Linyan; Fang, Liping; Zheng, Minghui; Liu, Guorui; Zhao, Yuyang; Liu, Wenbin |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2017 |
| 卷号 | 168期号:0页码:523-528 |
| 关键词 | Dioxins Pulp And Paper Making Xylanase Bleaching Non-wood Fiber |
| 英文摘要 | Enzyme-aided Cl-2 bleaching is widely considered as promising replacements for conventional Cl-2 bleaching in wood pulp and paper mills. However, the effects of using enzyme-aided bleaching on the formation of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the non-wood pulp and paper mills are unclear. A field study was performed to investigate PCDD/F formation when enzyme aided Cl-2 bleaching was used to replace conventional Cl-2 bleaching in non-wood pulp and paper mills. Unexpectedly, the PCDD/F toxic equivalents (TEQs) in solid samples were higher when using enzyme aided bleaching (0.49-5.4 pg TEQ/g) than that using conventional Cl-2 bleaching (0.15-2.44 pg TEQ/g). Large amounts of octachlorodibenzo-p-dioxin were formed during the enzyme-aided bleaching process. This could have been because enzyme strongly promoted the release of organic molecules bound to lignin and thus accelerated the formation of octachlorodibenzo-p-dioxin through organic molecular precursors. Although enzyme-aided Cl-2 bleaching was previously considered to be efficient for reducing PCDD/F releases and to be the best available technologies and best environmental practices for wood pulp and paper mills, the results obtained in this study suggested the necessity and urgency to evaluate the suitability of enzyme-aided Cl-2 bleaching for non-wood pulp and paper mills that intensively practiced in developing countries. (C) 2016 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39451]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Guo, Li,Huang, Linyan,Fang, Liping,et al. Unexpected promotion of PCDD/F formation by enzyme-aided Cl-2 bleaching in non-wood pulp and paper mill[J]. CHEMOSPHERE,2017,168(0):523-528. |
| APA | Guo, Li.,Huang, Linyan.,Fang, Liping.,Zheng, Minghui.,Liu, Guorui.,...&Liu, Wenbin.(2017).Unexpected promotion of PCDD/F formation by enzyme-aided Cl-2 bleaching in non-wood pulp and paper mill.CHEMOSPHERE,168(0),523-528. |
| MLA | Guo, Li,et al."Unexpected promotion of PCDD/F formation by enzyme-aided Cl-2 bleaching in non-wood pulp and paper mill".CHEMOSPHERE 168.0(2017):523-528. |
入库方式： OAI收割
来源：生态环境研究中心
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