垃圾填埋作业面挥发性有机化合物排放：臭氧和二次有机气溶胶的形成潜力。
Emission of volatile organic compounds from landfill working surfaces: Formation potential of ozone and secondary organic aerosols.
机构信息
School of Environment, Beijing Normal University, Beijing 100875, China.
School of Environment, Tsinghua University, Beijing 100084, China.
出版信息
Sci Total Environ. 2023 Aug 15;886:163954. doi: 10.1016/j.scitotenv.2023.163954. Epub 2023 May 7.
The working surface of landfills is an important source of volatile organic compounds (VOCs), which have received increasing attention because of their role in potentially forming ozone and secondary organic aerosols (SOAs). In this study, 99 monitoring datasets on VOC emissions from a landfill working surface were obtained in 9 months and used to evaluate their ozone formation potential (OFP) and SOA formation potential (SOAFP) from a statistical perspective and compared using various methods. December was found to have the highest total OFP and SOAFP caused by VOC emissions from the landfill working surface. Both the propylene equivalent concentration (PEC) and maximum incremental reactivity (MIR) methods indicated that oxygenated compounds, especially ethanol, contributed the most to the OFP, accounting for 16.1 %-95.4 % and 44.9 %-98.6 % of the total OFP during the entire observation period, respectively. The fraction aerosol coefficient (FAC) method highlighted the effect of aromatic hydrocarbons which contributed to over 97 % of the total SOAFP. In contrast, the SOA potential (SOAP) method indicated that both aromatic hydrocarbons and oxygenated compounds play important roles, contributing 26.6 %-93.9 % and 21.6 %-73.4 % of the total SOAFP, respectively. Based on their mechanisms and comprehensiveness, PEC and SOAP methods are considered more appropriate for evaluating the OFP and SOAFP of VOCs released from landfill working surfaces. The annual total OFP and SOAFP of VOCs from landfill working surfaces of China in 2020 were thus estimated as 1.5 × 10 t and 135 t, respectively, with high variations among different regions along with the population, waste management system, and the amount of landfilled waste. This study provides a comprehensive understanding of the potential impacts and evaluation methods of local waste landfills in the atmospheric environment from a statistical perspective.
垃圾填埋场的工作表面是挥发性有机化合物（VOCs）的重要来源，由于其在潜在形成臭氧和二次有机气溶胶（SOA）方面的作用，这些化合物受到了越来越多的关注。在这项研究中，在 9 个月内获得了 99 个关于垃圾填埋场工作表面 VOC 排放的监测数据集，并从统计学角度评估了它们的臭氧形成潜力（OFP）和 SOA 形成潜力（SOAFP），并使用各种方法进行了比较。结果表明，12 月垃圾填埋场工作表面 VOC 排放导致的总 OFP 和 SOAFP 最高。无论是丙烯当量浓度（PEC）法还是最大增量反应性（MIR）法，都表明含氧化合物，特别是乙醇，对 OFP 的贡献最大，在整个观测期间，占总 OFP 的 16.1%-95.4%和 44.9%-98.6%。气溶胶系数分数（FAC）法突出了芳香烃的作用，它们对总 SOAFP 的贡献超过 97%。相比之下，SOA 潜力（SOAP）法表明，芳香烃和含氧化合物都起着重要作用，分别占总 SOAFP 的 26.6%-93.9%和 21.6%-73.4%。基于它们的机制和全面性，PEC 和 SOAP 方法被认为更适合评估垃圾填埋场工作表面释放的 VOCs 的 OFP 和 SOAFP。因此，估算了 2020 年中国垃圾填埋场工作表面 VOCs 的年总 OFP 和 SOAFP 分别为 1.5×10^4t 和 135t，不同地区的差异较大，这与人口、废物管理系统和填埋废物量有关。本研究从统计学角度提供了对当地垃圾填埋场对大气环境潜在影响和评价方法的全面认识。
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