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题名: Formation and Emission of PCDD/Fs in Chinese Non-Wood Pulp and Paper Mills
作者: Wang, Xueli1;  Ni, Yuwen1;  Zhang, Haijun1;  Zhang, Xueping1;  Chen, Jiping1
刊名: ENVIRONMENTAL SCIENCE & TECHNOLOGY
发表日期: 2012-11-06
DOI: 10.1021/es303373b
卷: 46, 期:21, 页:12234-12240
收录类别: SCI
文章类型: Article
类目[WOS]: Engineering, Environmental ;  Environmental Sciences
研究领域[WOS]: Engineering ;  Environmental Sciences & Ecology
英文摘要: Chlorine bleaching is still practiced by non-wood pulp and paper mills in China, resulting in considerable formation and emission of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs). We investigate the distribution of PCDD/Fs in different papermaking processes and dioxin emissions at six typical Chinese non wood pulp and paper mills. Raw materials for papermaking included reed, wheat straw, bamboo, and sugar cane bagasse. The formation and emission of PCDD/Fs varied strikingly according to bleaching processes and raw materials. Elemental chlorine bleaching promoted the formation of tetra- to octa-CDDs and 2,3,7,8-TCDF, while hypochlorite bleaching only gave rise to a significant increase of 2,3,7,8-TCDF. Bleaching with elemental chlorine and hypochlorite increased 2,3,7,8-TCDF 0.9-42.5 and 0.3-4.1 times, respectively. Most of the 2,3,7,8-TCDF formed at hypochlorite bleaching stage was partitioned into the effluent, which indicated that hypochlorite bleaching was also an important emission source of dioxins. The removal of PCDD/Fs occurred visibly during alkaline digestion, alkaline extraction, and hydrogen peroxide bleaching. Furthermore, the annual emission of PCDD/Fs from Chinese non-wood pulp and paper mills was evaluated.
关键词[WOS]: BLEACHED KRAFT PULP ;  DIBENZO-P-DIOXINS ;  CHLORINATED DIOXINS ;  PCDFS ;  INDUSTRY ;  DESTRUCTION ;  MECHANISMS ;  EFFLUENTS ;  PHENOLS
语种: 英语
WOS记录号: WOS:000310665000091
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142896
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Wang, Xueli,Ni, Yuwen,Zhang, Haijun,et al. Formation and Emission of PCDD/Fs in Chinese Non-Wood Pulp and Paper Mills[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2012,46(21):12234-12240.
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