沧州市春季NMHCs空间分布特征  

Spatial Distribution Characteristics of NMHCs in Spring in Cangzhou City

作　　者：段菁春[1] 周雪明[2,3] 张鹤丰[1] 谭吉华[2,3] 胡京南[1] 柴发合[1] 

机构地区：[1]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 [2]中国科学院大学资源与环境学院,北京100049 [3]中国科学院生态环境研究中心,北京100085

出　　处：《环境科学》2017年第5期1769-1774,共6页Environmental Science

基　　金：国家自然科学基金项目(41475116,41275134,41675127);中国环境科学研究院研究专项(2012ysky09);国家重点研发计划重点专项(2016YFC0208900)

摘　　要：2015年春季在沧州市城区、郊区和潜在污染源附近选择了15个采样点进行同期采样.研究表明沧州市NMHCs总体上市区高于近郊及远郊区县;市区以高新区NMHCs浓度最高;郊县采样点除河间市略高外,其它采样点的浓度均明显低于市区浓度;机动车的道路排放是沧州市NMHCs的重要来源之一;沧州大化和沧州炼油在停产期间未对市区NMHCs产生明显影响;大港油田采油三厂采取了较完善的油气回收措施,未对市区NMHCs产生明显影响;平均来看,沧州市NMHCs中烷烃占65%,烯烃占16%,芳烃占19%;臭氧生成潜势(ozone formation potential,OFPs)主要来源于二甲苯(19%)、乙烯(14%)、甲苯(11%)、丙烯(5%)、异戊烷(5%)和异戊烯(5%)等;气溶胶生成潜势(formation potential of secondary organic aerosol,SOAFPs)主要来源于甲苯(28%)、蒎烯(28%)、二甲苯(16%)、乙苯(9%)和苯(9%)等.Simultaneous collections of non-methane hydrocarbons （NMHCs） were carried out at 15 sampling sites including urban, suburb and potential pollution areas in Cangzhou City in spring 2015. The results showed that NMHCs were generally higher in urban areas than those in suburb and rural areas; the highest concentration of NMHCs was observed at Cangzhou High-tech zone （ urban area）; the concentrations of NMHCs were significantly lower at rural sites than in most urban sites except Hejian site; vehicular emissions were the main sources of NMHCs in Cangzhou; Cangzhou chemical fertilizer plant and Cangzbou oil refinery had no significant influence on urban NMHCs during their shutdown period; Dagang Oilfield, with better oil and gas recovery systems, did not have a significant impact on urban NMHCs. In general, alkanes, alkenes and aromatics accounted for 65% , 16% and 19% of NMHCs in Cangzhou City, respectively; xylene （19%）, ethylene （14%）, toluene （11%）, propylene （5%）, isopentane （5%） and isopentene （5%） were the most dominant contributors to ozone formation potential; aerosol formation potential was mainly derived from toluene （28%） , pinene （28%） , xylene（16% ） , ethylbenzene （9%） and benzene （9%）.

关 键 词：非甲烷烃(NMHCs) 沧州 空间变化 臭氧生成潜势 挥发性有机物 

分 类 号：X513[环境科学与工程—环境工程]