摘要
不同来源的气溶胶中正构烷烃（Ｃ１５—Ｃ３１）稳定碳同位素的分布特征有比较明显的区别．以低等陆生植物为主的高原清洁区，其气溶胶中正构烷烃δ１３Ｃ较轻（－２９．９３‰～－２８．１４‰），随碳数的增加，δ１３Ｃ为较平缓的曲线；以高等植物为主的海滨清洁区，正构烷烃δ１３Ｃ分布亦为较平缓的曲线，但δ１３Ｃ较前者稍重，为－２８‰～－２７‰；人为污染严重的城市区，气溶胶正构烷烃δ１３Ｃ为－２９‰～－２５‰，且随碳数的增加有较大的变化．
There are obvious difference on stable carbon isotope(δ 13 C) distribution of individual n alkanes(C 15 —C 31 ) in aerosols from different sources.δ 13 C of individual n alkanes in aerosols from plateau cleaning zone where mainly grow grass are light (-29 93‰～-28 14‰).In this zone,the curves of δ 13 C distribution are gentle and small change occurs with the increasing carbon numbers of n alkanes.δ 13 C of n alkanes in aerosols from seashore cleaning zone where grow lot of plants are -28‰～-27‰ and slightly heavier than that from plateau cleaning zone.The curves of δ 13 C distribution in seashore aerosols are similar to that from plateau.δ 13 C of n alkanes in aerosols from polluted urban area are -29‰～-25‰.δ 13 C have obvious changes with carbon numbers of n alkanes.Their curves of δ 13 C distribution are different from those of cleaning zones.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1998年第2期12-15,共4页
Environmental Science
基金
国家自然科学基金
关键词
碳同位素
正构烷烃
气溶胶
大气污染
stable carbon isotope, n alkanes,cleaning zone,polluted area,aerosol.
