Isolation and radiocarbon analysis of elemental carbon in atmospheric aerosols using hydropyrolysis

被引：11
作者：
Zhang, Xiangyun [1 ,5 ]
Li, Jun [1 ]
Mo, Yangzhi [1 ,5 ]
Shen, Chengde [2 ]
Ding, Ping [2 ]
Wang, Ning [2 ]
Zhu, Sanyuan [1 ]
Cheng, Zhineng [1 ]
He, Jiazhuo [1 ]
Tian, Yankuan [1 ]
Gao, Shutao [1 ]
Zhou, Qin [1 ]
Tian, Chongguo [3 ]
Chen, Yingjun [4 ]
Zhang, Gan [1 ]
机构：
[1] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China
[2] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China
[3] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Peoples R China
[4] Tongji Univ, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China
[5] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
ATMOSPHERIC ENVIRONMENT | 2019年 / 198卷
基金：
中国国家自然科学基金;
关键词：
Elemental carbon; Atmospheric aerosols; Hydropyrolysis; Radiocarbon; NON-FOSSIL SOURCES; SOURCE APPORTIONMENT; ORGANIC-CARBON; BLACK CARBON; PYROGENIC CARBON; C-14; ANALYSIS; HAZE EVENTS; QUANTIFICATION; BIOCHAR; SYSTEM;
D O I：
10.1016/j.atmosenv.2018.11.005
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Radiocarbon (C-14) analysis is a powerful tool that can unambiguously distinguish fossil and non-fossil sources of carbonaceous particles. However, one of the big challenges of this method is to isolate elemental carbon (EC) or black carbon (BC) for C-14 analysis. Hydropyrolysis (hypy) has proven to be an effective method for separating BC in environmental matrices. The potential of hypy for isolation of EC from atmospheric aerosols is evaluated using typical combustion products from non-fossil (biomass), fossil fuel (coal and petroleum), and ambient aerosol samples collected in Beijing and Guangzhou. Using solid state nuclear magnetic resonance (NMR) along with measurement of carbon content and C-14, hypy conditions of 15 MPa hydrogen pressure and 550 degrees C temperature was confirmed to effectively separate EC from aerosol samples. Consequently, a comparison study of EC C-14 in aerosol samples separated using the two-step heating method (CTO-375), thermal-optical method and hypy was conducted. The results show that hypy is an effective and stable approach for matrix-independent C-14 quantification of EC in aerosols.
引用
收藏
页码：381 / 386
页数：6
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