基于正矩阵分解的印度西北部颗粒物受体模型

IF 3.7 Q2 ENVIRONMENTAL SCIENCES
Pallavi
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引用次数: 0

摘要

印度正面临着颗粒物(PM)来源分配研究领域的匮乏。在北印度观察到的频繁超标和异常高浓度PM进一步推动了颗粒物污染源的识别和量化,以制定缓解措施。但这里进行的大多数PM来源分配研究都集中在德里及其周边地区,因此本文将探索北印度一个研究不足地区的PM来源。本研究采用了美国环境保护局(US EPA)开发的正矩阵因子分解(PMF)5.0模型,用于2012年5月在莫哈利量化的颗粒物的来源表征。将美国环保局PMF 5.0应用于颗粒物和挥发性有机化合物的混合数据集,确定了七个来源因素,即灰尘、小麦残渣燃烧、生物燃料使用和废物处理、混合日间、汽车、两轮车)以及工业排放和溶剂使用。这些个体源因子对PM10和PM2.5质量负荷的贡献分别为48.8%、20.6%、15.8%、7.79%、2.89%、2.86%、1.37%和33.6%、22.6%、29.6%、4.97%、2.05%、4.07%和3.07%。粉尘和生物质燃烧是莫哈利PM的主要来源,在2012年5月的早晨(05:00–10:00 LT),其PM10(~321μg/m3)和PM2.5(~123μg/m3)的平均浓度相对最高。这项研究重申了检查人为活动的必要性,并呼吁采取严格的空气质量措施,特别是在5月份,以限制印度西北部的PM排放。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Positive matrix factorization-based receptor modelling of particulate matter in northwest India

India is facing a dearth in the area of particulate matter (PM) source apportionment studies. Frequent exceedances and unusual high concentrations of PM observed in North India further presses the identification and quantification of particulate pollution sources to plan mitigation measures. But most of the PM source apportionment studies performed here are concentrated in and around Delhi, so this paper sets to explore the sources of PM in an understudied region of North India. The present study employed positive matrix factorization (PMF) 5.0 model developed by the United States Environmental Protection Agency (US EPA) for source characterisation of particulate matter quantified at Mohali in May 2012. Application of US EPA PMF 5.0 to a hybrid dataset of particulate matter and volatile organic compounds identified seven source factors, namingly, dust, wheat residue burning, biofuel use and waste disposal, mixed daytime, cars, two-wheelers) and industrial emissions and solvent use. The contributions of these individual source factors to PM10 and PM2.5 mass loadings were found to be 48.8%, 20.6%, 15.8%, 7.79%, 2.89%, 2.86%, 1.37% and 33.6%, 22.6%, 29.6%, 4.97%, 2.05%, 4.07% and 3.07% respectively. Dust and biomass burning were the major sources of PM in Mohali that contributed relatively highest average concentrations of PM10 (∼321 μg/m3) and PM2.5 (∼123 μg/m3) during morning hours (05:00–10:00 LT) in May 2012. This study reaffirmed the need to check anthropogenic activities and calls for strict air quality measures, especially in May to limit PM emissions in northwest India.

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来源期刊
Current Research in Environmental Sustainability
Current Research in Environmental Sustainability Environmental Science-General Environmental Science
CiteScore
7.50
自引率
9.10%
发文量
76
审稿时长
95 days
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