中文关键词燃煤锅炉水溶性离子碳质组分多环芳烃(PAHs)排放特征 英文关键词coal-fired boilerswater-soluble ionscarbon componentspolycyclic aromatic hydrocarbons(PAHs)emission characteristics

作者	单位	E-mail
杨艳蓉	中国科学院大学资源与环境学院, 北京 100049	yangyanrong17@mails.ucas.ac.cn
周雪明	中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012
秦娟娟	中国科学院大学资源与环境学院, 北京 100049
谭吉华	中国科学院大学资源与环境学院, 北京 100049
胡京南	中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012
陈荣志	中国科学院大学资源与环境学院, 北京 100049
段菁春	中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012	duanjc@craes.org.cn
李艳	中国科学院大学资源与环境学院, 北京 100049

中文摘要 本研究收集了兰州市不同吨位燃煤锅炉颗粒物排放样品，分析并评估了锅炉烟气中水溶性无机离子、碳质组分、水溶性有机物（WSOC）以及多环芳烃（PAHs）的排放水平、排放特征及其影响因素.结果表明，SO₄^2-、Cl^-和Ca²⁺是燃煤锅炉样品中最主要的水溶性离子，分别占水溶性离子总和的35.13%、23.16%和22.20%.不同吨位燃煤锅炉样品的OCEC及其热解成分谱较为相似，OC1、OC2、OC3、OC4、EC1、EC2和EC3分别占TC的1.04%、8.26%、20.09%、6.78%、51.08%、7.09%和5.66%，其中EC1的含量最高，是最主要的碳质组分.WSOC/TC和WSOC/OC分别为0.09±0.07和0.23±0.12，且不同吨位锅炉之间差异较大.菲（Phe）、芘（Pyr）和苯并（k）荧蒽（BkF）是PAHs的3个主要成分，分别占PAHs总和的16.69%、11.93%和10.66%.不同吨位燃煤锅炉所排放颗粒物中水溶性离子、OCEC以及WSOC均与锅炉吨位大小无明显线性相关，随着吨位的增加PAHs轻组分含量减小. 英文摘要 Samples of particulate matter from coal-fired boilers of different tons were collected in Lanzhou city, and the water-soluble inorganic ions, carbonaceous species, water-soluble organic compounds (WSOC) and polycyclic aromatic hydrocarbons (PAHs) were analyzed. The results showed that SO₄^2-, Cl^-, and Ca²⁺ were the most important water-soluble ions in the coal-fired boiler samples, accounting for 35.13%, 23.16%, and 22.20% of the total mass of water-soluble ions, respectively. The pyrolysis composition spectra of the carbonaceous species were similar among the coal-fired boilers, and organic carbon fraction (OC1, OC2, OC3, and OC4),and elemental carbon fraction (EC1, EC2, and EC3) accounted for 1.04%, 8.26%, 20.09%, 6.78%, 51.08%, 7.09%, and 5.66% of the total carbon (TC), respectively. EC1 had the highest content and was the most important carbonaceous species. The average ratios of WSOC/TC and WSOC/OC were 0.09±0.07 and 0.23±0.12, respectively, and the difference among the boilers of different tons was large. Phenanthrene (Phe), pyrene (Pyr), and benzene(k)anthracene (BkF) were the three main components of the PAHs, accounting for 16.69%, 11.93%, and 10.66% of the total PAHs, respectively. The particulate water-soluble ions, organic/elemental carbon aerosol (OCEC) and WSOC emitted from different tons coal-fired boilers were not significantly linearly related to the tonnage of the steam boiler, and low molecular weight PAHs decreased with the increase of tonnage of the steam boiler.

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