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学科主题物理化学
Kinetics of PCDD/Fs Formation from Non-Wood Pulp Bleaching with Chlorine
Wang, Xueli; Zhang, Haijun; Ni, Yuwen; Du, Qinqin; Zhang, Xueping; Chen, Jiping; Chen JP(陈吉平)
刊名ENVIRONMENTAL SCIENCE & TECHNOLOGY
2014-04-15
DOI10.1021/es404347h
48期:8页:4361-4367
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Technology ; Life Sciences & Biomedicine
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
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.
语种英语
WOS记录号WOS:000334658400016
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/144094
专题中国科学院大连化学物理研究所
通讯作者Chen JP(陈吉平)
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.,...&陈吉平.(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.
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