Kinetics of PCDD/Fs Formation from Non-Wood Pulp Bleaching with Chlorine
文献类型：期刊论文
| 作者 | Wang, Xueli; Zhang, Haijun; Ni, Yuwen; Du, Qinqin; Zhang, Xueping; Chen, Jiping |
| 刊名 | environmental science & technology
 |
| 出版日期 | 2014-04-15 |
| 卷号 | 48期号:8页码:4361-4367 |
| 通讯作者 | 陈吉平 |
| 英文摘要 | chlorine bleaching is still practiced by most of nonwood pulp and paper mills, resulting in a considerable amount of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (pcdd/fs) formation and emission. in this study, the effects of primary chlorination conditions on the formation of pcdd/fs from nonwood pulp bleaching with elemental chlorine were investigated. it was found that low-chlorinated pcdd/fs were usually formed and then underwent further chlorination to form highly chlorinated pcdd/fs with increasing chlorination time. higher available chlorine dosages and lower system ph values greatly accelerated dioxin formation, and ph 3 was the threshold for the formation of tetra- to octa-cdd/fs. higher temperatures promoted the formation of lower-chlorinated pcdd/fs, while caused significant reduction of tetra- to hepta-cdds and penta- to octa-ocdfs. pcdfs were formed much faster than pcdds. a first-order kinetic model showed a good fit to the data for tetra- to oct-cdfs formation under different chlorination conditions, indicating that chlorine substitution was the rate determining step for their formation. finally, the optimum chlorination conditions for minimizing and eliminating the formation of 2,3,7,8-tcdd/tcdf in nonwood pulp bleaching with elemental chlorine were established. |
| WOS标题词 | science & technology ; technology ; life sciences & biomedicine |
| 学科主题 | 物理化学 |
| 类目[WOS] | engineering, environmental ; environmental sciences |
| 研究领域[WOS] | engineering ; environmental sciences & ecology |
| 关键词[WOS] | dibenzo-p-dioxins ; paper-mills ; kraft pulp ; polychlorinated phenols ; chinese pulp ; pcdfs ; industry ; mechanisms ; effluents ; emission |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000334658400016 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/144094]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | Dalian Inst Chem Phys, Chinese Acad Sci, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xueli,Zhang, Haijun,Ni, Yuwen,et al. Kinetics of PCDD/Fs Formation from Non-Wood Pulp Bleaching with Chlorine[J]. environmental science & technology,2014,48(8):4361-4367. |
| APA | Wang, Xueli,Zhang, Haijun,Ni, Yuwen,Du, Qinqin,Zhang, Xueping,&Chen, Jiping.(2014).Kinetics of PCDD/Fs Formation from Non-Wood Pulp Bleaching with Chlorine.environmental science & technology,48(8),4361-4367. |
| MLA | Wang, Xueli,et al."Kinetics of PCDD/Fs Formation from Non-Wood Pulp Bleaching with Chlorine".environmental science & technology 48.8(2014):4361-4367. |
入库方式： OAI收割
来源：大连化学物理研究所
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