本文選題：PAHs + 土壤　； 參考：《土壤》2016年06期

【摘要】：在烏魯木齊市周邊,從烏拉泊到水西溝按不同距離與深度進(jìn)行土壤樣品采集,采用索氏提取法與層析凈化法進(jìn)行預(yù)處理,高效液相色譜法測(cè)定土壤中16種多環(huán)芳烴(PAHs)的含量,并對(duì)PAHs進(jìn)行對(duì)比分析、污染評(píng)價(jià)和來(lái)源分析的相關(guān)研究。結(jié)果表明:總PAHs平均濃度為998.23(306.94~3 652.16)ng/g,污染程度差異不大,處中度污染水平但更接近嚴(yán)重污染水平;16種PAHs的最低檢測(cè)限為0.20~0.80 ng/g;一些采樣點(diǎn)的表層土壤中苯并[a]芘的含量高于土壤質(zhì)量控制標(biāo)準(zhǔn)。不同層次土壤PAHs的污染程度有所不同,其順序?yàn)楸韺又袑酉聦?高分子量(4~6環(huán))PAHs占據(jù)了總含量的84.1%,低分子量(2~3環(huán))PAHs占據(jù)15.9%,得出在烏魯木齊市周邊土壤中PAHs的重要來(lái)源是汽車(chē)排放,同時(shí)煤燃燒排放的貢獻(xiàn)也很大。
[Abstract]:Around Urumqi, soil samples were collected from Urapor to Shuixigou at different distances and depths. The contents of 16 polycyclic aromatic hydrocarbons (PAHs) in soil were determined by high performance liquid chromatography (HPLC) after pretreatment by Soxhlet extraction and chromatography. The comparative analysis, pollution assessment and source analysis of PAHs were carried out. The results showed that the average concentration of total PAHs was 998.23 (306.94 鹵3 652.16) ng / g, and the pollution degree was not different. The lowest detection limit of 16 PAHs was 0.20 ~ 0.80 ng / g, and the content of benzo [a] pyrene in topsoil of some sampling sites was higher than that of soil quality control standard. The pollution degree of PAHs in different layers was different, and the order of PAHs was the surface layer and the lower layer. High molecular weight (4 ~ 6 ring) PAHs occupied 84.1% of the total content, and low molecular weight (2 ~ 3 ring) PAHs occupied 15.9%. It was concluded that the important source of PAHs in the soil around Urumqi was vehicle emissions, and the contribution of coal combustion emissions was also very great.
【作者單位】： 新疆農(nóng)業(yè)大學(xué)草業(yè)與環(huán)境科學(xué)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(21167017;20567028)資助
【分類(lèi)號(hào)】：X53
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本文編號(hào)：2062395