發(fā)布時(shí)間：2024-06-08 04:32

　　許多研究表明植物葉能較好的生物監(jiān)測大氣中污染物的濃度水平。為了了解不同樹葉對有機(jī)污染物的富集能力,2011年8月在長白山地區(qū)5個(gè)地點(diǎn)采集54種植物87個(gè)植物葉樣品(一年生落葉樹種)并且利用氣流吹掃微注射器萃取技術(shù)(GP-MSE)聯(lián)合氣相色譜質(zhì)譜測定植物葉中7種低分子量的多環(huán)芳烴。實(shí)驗(yàn)結(jié)果表明植物葉中總PAHs的濃度水平有所變化,范圍是73.9-398ng g-1(干重)。在長白山北部偏迎風(fēng)坡和東北部背風(fēng)坡分別檢測最高和最低的PAHs濃度水平,此外在同一地點(diǎn)不同樹葉中檢測的濃度水平相似,差異低于兩倍。組成分析表明同一地點(diǎn)植物葉能判定相同的來源,主成分分析進(jìn)一步表明植物葉能區(qū)分城市和偏遠(yuǎn)地區(qū)的污染來源。整體趨勢與各自大氣污染源吻合,表明植物葉能反映不同地理環(huán)境大氣的污染水平。所有地點(diǎn)多環(huán)芳烴的濃度與樹葉脂含量沒有相關(guān)性,而與比葉面積有微弱的正相關(guān)。通過大量植物的研究,任何一種植物葉均能作為被動(dòng)采樣器檢測當(dāng)?shù)卮髿馕廴舅健?br>
【文章頁數(shù)】：42 頁

【學(xué)位級別】：碩士

【文章目錄】：
摘要 Abstract 1 Introduction
1.1 Plant as passive sampler
1.2 Uptake pathways of POPs by plant leaves
1.3 Influence factors of plant leaves on accumulating POPs
1.4 Analysis methods of POPs in plant leaves
1.5 The geographical environment of the Changbai Mountain
1.6 Purposes 2 Material and method
2.1 Materials and standards
2.2 Study area and sample collection
2.3 Extraction and purification
2.4 Characterization of the tree leaves
2.5 Instrumental analysis
2.6 Quality assurance and quality control
2.7 Principal Components Analysis 3 Results and discussion
3.1 PAHs concentration level in plant leaves
    3.1.1 Intersite variability
    3.1.2 Interspecific variability
3.2 Identification ability for pollution source
    3.2.1 Composition profiles of individual PAHs in tree leaves
    3.2.2 Principal Components Analysis interpretation
3.3 Effect of leaf paramaters on enrichment 4 Conclusions 參考文獻(xiàn) 致謝 附錄A



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