珠江三角洲典型过程VOCs的平均浓度与化学反应活性
The mean concentration and chemical reactivity of VOCs of typical processes over Pearl River Delta Region
查看参考文献31篇
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文摘
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分析了珠江三角洲秋季VOCs在相对污染与清洁情况下的日变化特征.污染情况下的VOCs质量浓度可达清洁情况下的2.2倍,污染富集的是甲苯,二甲苯,乙苯,正丁烷,戊烷,丙烷,乙炔,乙烯等物种.自然排放的异戊二烯具有早晚浓度低而白天浓度高的日变化规律,体现植物的光合作用特征;而人类活动污染排放的甲苯其日变化规律基本反映了气象条件与污染源排放日变化的影响,在相对污染情况下早上出现明显的污染富集,午后出现污染低值.反应活性较强的物质主要是烯烃(反式-2-丁烯,异戊二烯,顺2-戊烯)与芳香烃(间对-二甲苯,甲苯);烯烃的质量百分比最低,却占最高的化学反应活性百分比 |
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其他语种文摘
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The diurnal features of VOCs in relative pollution and clean processes in autumn over Pearl River Delta (PRD) are analyzed. The mass concentration of VOCs under pollution circumstances can be 2.2 times as high as that with clean process. Contributed to pollution enrichment are the pollutants of toluene, xylene, ethylbenzene, butane, pentane, propane, acetylene and ethane, etc. The isoprene emitted from nature has the diurnal features of lower concentration in the morning and evening versus higher concentration during daytime, indicating characteristics of botanic photosynthesis, while toluene from anthropogenic emission has the diurnal features which basically reveal the effects of diurnal changes of meteorological condition and source emission, with obvious pollution enrichment in the morning and lower concentration in the afternoon under relative pollution circumstances. Relatively more active reactivity pollutants include alkene (trans-2-butene, isoprene, cis-2-pentene) and aromatic hydrocarbon (m/p-xylene, toluene), of which alkene has the lowest mass percentage while having the highest chemical reactivity percentage |
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来源
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中国环境科学
,2010,30(9):1153-1161 【核心库】
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关键词
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臭氧前体物VOCs
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平均浓度
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化学反应活性
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污染富集
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珠江三角洲
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地址
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1.
中国气象局广州热带海洋气象研究所, 中国气象局热带季风重点开放实验室, 广东, 广州, 510080
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中国科学院广州地球化学研究所, 广东, 广州, 510640
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北京大学物理学院大气科学系, 北京, 100871
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中国气象科学研究院, 北京, 100081
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-6923 |
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学科
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环境科学基础理论 |
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基金
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国家自然科学基金资助项目
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国家863计划
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国家973计划
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广东省自然科学基金
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广东省科技计划项目
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广东省气象局热带海洋气象科学研究基会项目
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文献收藏号
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CSCD:3993331
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