CAJ | 학술논문

研究了兰州市和太原市环境空气中非甲烷烃(NMHCs)的污染状况及来源.利用Tenax-TA吸附管采样,热解析-色谱-同位素质谱联用仪(TD-GC-IRMS)测定了两个城市夏季不同功能区环境空气中NMHCs的稳定碳同位素组成.得出,兰州市和太原市居民区苯的δ(~(13)C)分别为-26.4‰和-25.0‰;正烷烃的δ(~(13)C)分别为-33.9‰～-26.1‰,-32.8‰～-27.4‰;两市交通枢纽区环境空气中检测出的C4-C7之间的NMHCs化合物相同,δ(~(13)C)相差不大,兰州市为-30.8‰～-25.6‰,太原市为-31.0‰～-26.4‰.结果表明,两市交通枢纽区苯主要来源于汽车尾气和油类挥发,工业区石化行业类主要排放的NMHCs污染物为苯和烷烃类化合物,电厂等大型企业主要排放异丁烯、顺-2-戊烯等.控制汽车尾气、油类挥发、工业排放是降低环境空气中NMHCs污染的关键.
연구료란주시화태원시배경공기중비갑완경(NMHCs)적오염상황급래원.이용Tenax-TA흡부관채양,열해석-색보-동위소질보련용의(TD-GC-IRMS)측정료량개성시하계불동공능구배경공기중NMHCs적은정탄동위소조성.득출,란주시화태원시거민구분적δ(~(13)C)분별위-26.4‰화-25.0‰;정완경적δ(~(13)C)분별위-33.9‰～-26.1‰,-32.8‰～-27.4‰;량시교통추뉴구배경공기중검측출적C4-C7지간적NMHCs화합물상동,δ(~(13)C)상차불대,란주시위-30.8‰～-25.6‰,태원시위-31.0‰～-26.4‰.결과표명,량시교통추뉴구분주요래원우기차미기화유류휘발,공업구석화행업류주요배방적NMHCs오염물위분화완경류화합물,전엄등대형기업주요배방이정희、순-2-무희등.공제기차미기、유류휘발、공업배방시강저배경공기중NMHCs오염적관건.
Sampled by Tenax-TA adsorption tube, the stable carbon isotopic composition of non-methane hydrocarbons (NMHCs) in summer atmosphere in different functional districts in Lanzhou and Taiyuan city was determined by Thermal Desorption-Gas Chromatography-Isotope Ratio Mass Chromatography. The results indicate that the δ~(13)C values of benzene and n-alkanes are -26.4‰, -33.9‰～-26.1‰ and -25.0‰, -32.8‰～-27.4‰ respectively in residential area in Lanzhou and Taiyuan city respectively; the sorts of NMHCs compounds determined in transport hubs in the two cities are the same and the δ~(13)C values are -30.8‰~-25.6‰ and -31.0‰~-26.4‰, respectively. The results furthermore indicate that benzene are mainly from vehicle exhaust and fuel volatile in transport hub in the two cities; the main components of NMHCs are benzene and alkanes in petrochemical industry in industrial estate, while large enterprise such as power plants mainly emits isobutene and cis-2-petene etc. Controlling vehicle exhaust, fuel volatile and industry emissions is the key to reduce atmospheric NMHCs pollution.