Formation and potential mechanisms of polychlorinated dibenzo-p-dioxins and dibenzofurans on fly ash from a secondary copper smelting process

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Formation and potential mechanisms of polychlorinated dibenzo-p-dioxins and dibenzofurans on fly ash from a secondary copper smelting process
	Wang, Mei; Liu, Guorui; Jiang, Xiaoxu; Xiao, Ke; Zheng, Minghui
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2015-06
卷号	22 期号:11 页码:8747-8755
关键词	PCDD/Fs Secondary copper smelting Fly ash Chlorination Thermal treatment Persistent organic pollutants
英文摘要	Secondary copper smelting (SeCu) is widely considered to be an important source of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs and PCDFs; PCDD/Fs). Laboratory experiments were performed using SeCu fly ash as a matrix for thermochemical reactions to investigate the effects of fly ash on the formation of PCDD/Fs and the potential mechanisms. Thermochemical reactions on SeCu fly ash over a temperature range of 250-450 A degrees C and reaction times of 10-120 min caused the PCDD/F concentrations in the fly ash to increase significantly. The PCDD/F concentrations formed in the thermal reactions were about 99-139 times higher than the PCDD/F concentrations in the original fly ash, clearly indicating that fly ash promoted the formation of PCDD/Fs. The PCDFs dominated the PCDDs, and the PCDF/PCDD concentration ratio was about 30-40. Octachlorodibenzofuran (OCDF), octachlorodibenzo-p-dioxin, and the heptachlorodibenzofurans were the most dominant homologs that were formed. A comparison of the PCDD/F patterns produced in the thermochemical reactions and the patterns in the original fly ash suggested that the chlorination of less chlorinated PCDFs might be an important pathway in the formation of higher chlorinated furans. The results of this study indicated that SeCu fly ash has a high PCDD/F formation potential. It is crucial to have the fly ash filter at low temperature and that fly ash in the cooling system should be minimized.
研究领域[WOS]	Environmental Sciences
WOS记录号	WOS:000354960300072
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32579]
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	Wang, Mei,Liu, Guorui,Jiang, Xiaoxu,et al. Formation and potential mechanisms of polychlorinated dibenzo-p-dioxins and dibenzofurans on fly ash from a secondary copper smelting process[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2015,22(11):8747-8755.
APA	Wang, Mei,Liu, Guorui,Jiang, Xiaoxu,Xiao, Ke,&Zheng, Minghui.(2015).Formation and potential mechanisms of polychlorinated dibenzo-p-dioxins and dibenzofurans on fly ash from a secondary copper smelting process.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,22(11),8747-8755.
MLA	Wang, Mei,et al."Formation and potential mechanisms of polychlorinated dibenzo-p-dioxins and dibenzofurans on fly ash from a secondary copper smelting process".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 22.11(2015):8747-8755.