Stable isotopic signatures of methane from waste sources through atmospheric measurements
Stable isotopic signatures of methane from waste sources through atmospheric measurements
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通过大气测量获得废物源甲烷的稳定同位素特征
DOI：
10.1016/j.atmosenv.2022.119021
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发表时间：
2022
影响因子：
5
通讯作者：
Bakkaloglu S
中科院分区：
文献类型：
--
作者：
Bakkaloglu S
本研究旨在表征几种甲烷废物来源的碳同位素特征（δ 13 C-CH 4），主要在英国，以及在荷兰和土耳其的实地活动期间。在移动的调查过程中，使用光腔衰荡光谱（CRDS）分析仪检测废物源排放的CH 4羽流。在羽流中采集空气样品，随后通过气相色谱同位素比质谱法（GC-IRMS）进行同位素分析，以表征δ 13 C-CH 4。通过基林图方法和二元相关误差和固有散射（BCES）拟合方法确定同位素特征。沼气厂的δ 13 C-CH 4和δ 2 H-CH 4的特征（−54.6 ± 5.6‰，n = 34; −314.4 ± 23‰ n = 3），垃圾填埋场（−56.8 ± 2.3‰，n = 43; −268.2 ± 2.1‰，n = 2），污水处理厂（-51.6 ± 2.2‰，n = 15; −303.9 ± 22‰，n = 6），堆肥设施（−54.7 ± 3.9‰，n = 6）、一个垃圾渗滤液处理厂（−57.1 ± 1.8‰，n = 2）、一个自来水处理厂（−53.7 ± 0.1‰）和一个废物回收设施（−53.2 ± 0.2‰）。71个废物源的总体特征范围为−64.4 ‰至−44.3‰，δ 13 C的平均值为−55.1 ± 4.1‰（n = 102），δ 2 H的平均值为− 341 ‰至−267‰（n = 11），可以与英国的其他来源类型（如气体泄漏和反刍动物）区分开来。该研究还表明，除了δ 13 C-CH 4之外，δ 2 H-CH 4特征还可以帮助更好地进行废物源分配，并增加改进区域建模所需的同位素数据的粒度。
This study aimed to characterize the carbon isotopic signatures (δ13C-CH4) of several methane waste sources, predominantly in the UK, and during field campaigns in the Netherlands and Turkey. CH4plumes emitted from waste sources were detected during mobile surveys using a cavity ring-down spectroscopy (CRDS) analyser. Air samples were collected in the plumes for subsequent isotope analysis by gas chromatography isotope ratio mass spectrometry (GC-IRMS) to characterizeδ13C-CH4. The isotopic signatures were determined through a Keeling plot approach and the bivariate correlated errors and intrinsic scatter (BCES) fitting method. Theδ13C-CH4andδ2H-CH4signatures were identified from biogas plants (−54.6 ± 5.6‰, n = 34; −314.4 ± 23‰ n = 3), landfills (−56.8 ± 2.3‰, n = 43; −268.2 ± 2.1‰, n = 2), sewage treatment plants (−51.6 ± 2.2‰, n = 15; −303.9 ± 22‰, n = 6), composting facilities (−54.7 ± 3.9‰, n = 6), a landfill leachate treatment plant (−57.1 ± 1.8‰, n = 2), one water treatment plant (−53.7 ± 0.1‰) and a waste recycling facility (−53.2 ± 0.2‰). The overall signature of 71 waste sources ranged from −64.4 to −44.3‰, with an average of −55.1 ± 4.1‰ (n = 102) forδ13C, −341 to −267‰, with an average of −300.3 ± 25‰ (n = 11) forδ2H, which can be distinguished from other source types in the UK such as gas leaks and ruminants. The study also demonstrates thatδ2H-CH4signatures, in addition toδ13C-CH4, can aid in better waste source apportionment and increase the granularity of isotope data required to improve regional modelling.
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