关中住宅燃煤排放PM<sub>2.5</sub>中NACs污染特征及吸光特性

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摘要为探究关中农村地区住宅散煤采用不同燃烧方式产生的硝基芳香族化合物(NACs)的分子组成、区域排放量及吸光贡献差异,本文选定烟煤和无烟煤,基于现场炉灶加稀释采样系统,利用超高效液相-四级杆飞行时间质谱联用仪开展煤燃烧排放NACs的特征研究.研究结果表明,关中地区煤燃烧过程中ΣNACs的平均排放因子(EF_ΣNACs)为3.7mg/kg,其中烟煤型煤(7.5mg/kg)>无烟煤型煤(2.7mg/kg)=烟煤(2.7mg/kg)>无烟煤(1.7mg/kg),使用不同炉灶对煤进行燃烧产生的EF_ΣNACs差异较大,在传统炉灶中,烟煤型煤排放的EFΣNACs最高,无烟煤型煤和烟煤原煤次之,无烟煤原煤最低.使用配风炉后,烟煤型煤排放的EF_ΣNACs降幅最大.在365nm处ΣNACs吸光值烟煤型煤传统炉灶>无烟煤型煤传统炉灶>烟煤配风炉>烟煤型煤配风炉>无烟煤配风炉>烟煤传统炉灶>无烟煤传统炉灶.本文估算出2019年关中五市煤炭燃烧产生ΣNACs总排放量为198.8t,其中渭南(91.6t)>西安(32.2t)>咸阳(29.2t)≈宝鸡(29.0t)>铜川(16.8t).

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	王佳丽
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	沈振兴

关键词 ：煤燃烧, 硝基酚类化合物, 排放因子, 排放量, 吸光

Abstract：In order to investigate the differences in the molecular composition, regional emission and light absorption contribution of nitrated aromatic compounds (NACs) produced by different combustion methods of residential coal in rural areas of Guanzhong Plain, bituminous coal and anthracite were selected as fuels. Based on the field stove and dilution sampling system, the characteristics of (NACs) emissions from coal combustion were studied by using ultra-high performance liquid phase and four-pole time-of-flight mass spectrometry. The results show that the average emission factor of ΣNACs (EF_ΣNACs) during coal combustion in Guanzhong area was 3.7mg/kg, in which bituminous briquette (7.5mg/kg) > anthracite briquette (2.7mg/kg) = bituminous coal (2.7mg/kg) > anthracite (1.7mg/kg), the EF_ΣNACs produced by coal combustion in different stoves were significantly different. In traditional stoves, the EF_ΣNACs emitted by bituminous briquettes were the highest, followed by anthracite briquettes and bituminous raw coal, and anthracite raw coal was the lowest. The EF_ΣNACs from bituminous briquette decreased the most after the use of air distribution furnace. The light absorption value of ΣNACs at 365nm was bituminous briquette traditional stove > anthracite briquette traditional stove > bituminous briquette air distribution furnace > anthracite air distribution furnace > bituminous traditional stove > anthracite traditional stove > anthracite traditional stove. In this paper, the total emission of ΣNACs from coal combustion in five cities of Guanzhong Plain in 2019was estimated to be 198.8t, with Weinan (91.6t) > Xi ’an (32.2t) > Xianyang (29.2t) ≈ Baoji (29.0t) > Tongchuan (16.8t).

Key words： coal combustion nitrophenol compounds emission factor emissions light absorption

收稿日期: 2024-02-09

PACS:

X513

基金资助:国家自然科学基金青年基金资助项目(42007193);陕西省重点研发计划项目(2022ZDLSF06-07)

通讯作者: 张倩,副教授,zhangqian2018@xauat.edu.cn E-mail: zhangqian2018@xauat.edu.cn

作者简介: 王佳丽(1999-),女,四川眉山人,硕士研究生,主要从事燃烧源排放硝基酚类物质特征研究.jiali@xauat.edu.cn

引用本文:

王佳丽, 张倩, 王翌璇, 赵子异, 孙健, 沈振兴. 关中住宅燃煤排放PM_2.5中NACs污染特征及吸光特性[J]. 中国环境科学, 2024, 44(9): 4844-4852. WANG Jia-li, ZHANG Qian, WANG Yi-xuan, ZHAO Zi-yi, SUN Jian, SHEN Zhen-xing. Characteristics of pollution, emission inventory and light absorption of nitrated aromatic compounds in PM_2.5 from residential coal combustion in Guanzhong Plain. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(9): 4844-4852.

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