DICP OpenIR
Subject Area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)
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
2014-04-15
DOI10.1021/es404347h
Volume48Issue:8Pages:4361-4367
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine
WOS SubjectEngineering, Environmental ; Environmental Sciences
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS KeywordDIBENZO-P-DIOXINS ; PAPER-MILLS ; KRAFT PULP ; POLYCHLORINATED PHENOLS ; CHINESE PULP ; PCDFS ; INDUSTRY ; MECHANISMS ; EFFLUENTS ; EMISSION
AbstractChlorine 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.
Language英语
WOS IDWOS:000334658400016
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/144094
Collection中国科学院大连化学物理研究所
Corresponding AuthorChen JP(陈吉平)
AffiliationDalian Inst Chem Phys, Chinese Acad Sci, Dalian 116023, Peoples R China
Recommended Citation
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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