摘要
本文以兰州大气环境为试点,收集西固工业区、铁路商业—居民混合区和盘旋路交通要道区①取暖期(1994年3月)和非取暖期(1994年8月)的大气飘尘样品,固定污染源烟尘和汽车尾气样以及选择石油和煤的端元样品,利用MAT252(GCCMC)仪进行正构烷烃单分子碳同位素测定。研究了大气飘尘、烟尘和尾气排放物中正构烷烃单分子碳同位素组成特征及分布规律,结合化石燃料(石油和煤)的分析结果提出了结果提出了冬季δ13C值高于夏季,西固工业区冬季、夏两季相似。经选择nC21~nC23单分子碳同位素值用二元复合估算结果,西固工业区大气污染主要为燃油源,市区内取暖期燃煤源输入率高,非取暖期主要来自燃油源,以汽车尾气为主,兰州市大气污染物中燃油源占60%以上,这与用石油作为主要能源所造成的大气环境污染密切相关。
The airborne particulates were sampled from the Xigu industrial area,the railway,commercial and residential mixed area and Panxuan Circle road area during heating period (March,1994)and nonheating period (August,1994). The carbon isotopic compositions of n alkane series of the samples were analyzed by a MAT 252 instrument (GC C IRMS)、We investigated the characteristics and distributions of the carbon isotopic compositions and concluded that (1)the δ 13 C values in winter resemble that in summer except that both are similar in the Xigu industial area.,(2)The results,calculated using a two end model of the carbon isotopic compositions from nC 21 to nC 23 show that the air pollution of the Xigu industrial area is mainly caused by oil burning,that of the urban district coal burning during a heating period and oil burning of automobile during a nonheating period, and (3)oil burning pollution matter makes up over 60% of the organic pollution one, caused chiefly by oil burning.
出处
《沉积学报》
CAS
CSCD
北大核心
1998年第4期159-162,共4页
Acta Sedimentologica Sinica
关键词
大气飘尘
正构烷烃
单分子碳同位素
空气污染
airborne particutlates n-alkane carbon isotopic burning coal source burning oil source