电炉铁合金飞灰中金属和二噁英分布特性研究  

Profiles of selected metals and dioxins in fly ash from ferroalloy electric melting furnaces

作　　者：黄凤兰[1] 张春林[1,2] 王伯光[1,2] 黄青[1,2] 

机构地区：[1]暨南大学理工学院环境工程系,广东广州510632 [2]暨南大学广东省普通高校水土环境毒害性污染防治与生物修复重点实验室,广东广州510632

出　　处：《中国环境科学》2014年第4期869-875,共7页China Environmental Science

基　　金：国家自然科学基金(40975077;51308257);广州市科技计划项目(7411802487242)

摘　　要：分别利用高分辨气相色谱-低分辨质谱（HRGC-LRMS）联用仪、原子吸收分光光度计对4个电炉铁合金飞灰中4-8氯取代PCDD/Fs和12种金属进行检测，结果表明，飞灰中金属元素浓度高，其中重金属以 Zn 浓度最高，为19835.918-36729.200mg/kg；Ni 浓度最低，为9.000-43.627mg/kg.4个灰样中PCDD/Fs的浓度差别较大，总量在33.792-88.125ng/g范围内，该浓度水平与生活垃圾焚烧飞灰相当.4个灰样中PCDD/Fs的分布特征不尽相同，但是均以OCDD/F的浓度最高.飞灰中较高的二噁英浓度水平与高浓度的Fe、Cu、Ca和Ni等金属存在一定的相关性.Concentrations of tetra-, penta-, hexa-, hepta-, and octachlorinated dibenzo-p-dioxins and dibenzofurans （PCDD/Fs）, as well as 12metal elements, in four fly ash samples from different metallurgical plants, were determined by a high resolution gas chromatography-low resolution mass spectrometer （HRGC-LRMS） and an atomic absorption spectrophotometer （AAS）, respectively. The metal concentrations were very high in these samples. In general, Zn and Ni had the highest （1983.918-36729.200mg/kg） and the lowest （9.000-43.627mg/kg） concentrations, respectively, among the 12metal elements. The total PCDD/Fs concentrations （33.792-88.125ng/g） in the four samples were comparable to those in municipal solid waste incineration fly ashes reported in literature. Octachlorinated dibenzo-p-dioxin and dibenzofurans （OCDD/Fs） were the predominant congener in all samples, while a big difference in the PCDD/F homologue profiles was seen among the samples. Higher dioxin content may associate with higher heavy metals content.

关 键 词：电炉铁合金 飞灰 PCDD FS 金属元素 分布特征 

分 类 号：X511[环境科学与工程—环境工程]