Sedimentary transport and fate of polycyclic aromatic hydrocarbons (PAH) from managed burning of moorland vegetation on a blanket peat, South Yorkshire, UK.
Sedimentary transport and fate of polycyclic aromatic hydrocarbons (PAH) from managed burning of moorland vegetation on a blanket peat, South Yorkshire, UK.
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英国南约克郡沼泽植被覆盖层泥炭上的有管理燃烧所产生的多环芳烃 (PAH) 的沉积物迁移和归宿。
DOI：
10.1016/j.scitotenv.2013.01.043
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Leng
中科院分区：
文献类型：
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作者：
C. Vane;B. Rawlins;A. Kim;V. Moss;C. P. Kendrick;M. Leng
本研究报告的浓度18多环芳烃（PAH）从管理燃烧的高沼地植被，并比较他们的多环芳烃在集水区植被，底层泥炭，头水悬浮沉积物（HSS），溪流水和水库沉积物芯。多环芳烃的总含量在泥炭层中为203 - 11，112 μg/kg，在新鲜高沼地植被中为101-290μg/kg，在焚烧现场为4186μg/kg，在HSS中为17，439 μg/kg，在溪流中为56 ng/L，在水库沉积物中为987 - 7346μg/kg。没有总的或个别的多环芳烃浓度超过公布的沉积物质量准则。所选的高沼地植被（泥炭藓，石楠和越橘）的二萘嵌苯含量范围从10%到18%相比，只有2%的沉积物托管的多环芳烃。对燃烧后的表面层的全部组分和<250μm组分的比较表明，细组分中PAH浓度增加了近三倍，并且PAH分布发生了变化，使得萘>>菲>2-甲基萘。在泥炭层沉积物表面（0- 10 cm）附近观察到总PAH含量升高，然后在更深处下降。HSS的高PAH含量归因于富含有机物的颗粒的高吸附能力（TOC 25.8%（wt/wt））。个别PAH在油藏岩心和HSS的分布是一致的，主成分分析和异构体比例的结果表明，主要是热解输入，无论是植被燃烧和燃煤。通过对油藏岩心多环芳烃剖面的对比，发现自1929年油藏建成以来，多环芳烃的来源基本上没有变化。反映了一贯的高沼地管理实践。
This study reports the concentrations of 18 polycyclic aromatic hydrocarbons (PAH) from managed burning of moorland vegetation and compares them to PAH in catchment vegetation, underlying peats, head water suspended sediment (HSS), stream water and reservoir sediment cores. Total PAH ranged from 203 to 11,112μg/kg in the blanket peats, 101–290μg/kg in the fresh moorland vegetation, 4186μg/kg at the burnt site, 17,439μg/kg in the HSS, 56ng/L in the stream water and 987 to 7346μg/kg in the reservoir sediments. No total or individual PAH concentrations exceeded the published sediment quality guidelines. The perylene content of selected moorland vegetation (sphagnum, heather and bilberry) ranged from 10 to 18% as compared to only 2% for the sediment hosted PAH. A comparison of whole and <250μm fractions from the burnt surface layer revealed a near threefold increase in PAH concentration in the fine fraction and a change in the PAH distribution such that naphthalene>>phenanthrene>2-methylnaphthalene. Elevated total PAH contents were observed close to the blanket peat sediment surface (0–10cm) and then declined at greater depths. The high PAH content of the HSS was attributed to the high sorption capacity of the organic-rich particles (TOC 25.8% (wt/wt)). The distribution of individual PAH in reservoir cores and HSS was consistent and the results of the principal component analysis and isomeric ratios suggest mainly pyrolytic inputs, from either vegetation burning and coal combustion. A comparison of the reservoir core PAH profiles shows that the source(s) have remained largely unchanged since the reservoir construction in 1929A.D. reflecting consistent moorland management practices.