华北农村冬季细颗粒物元素组分的特征及来源

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Abstract Using the observation data of the Xact analyzer from November 21, 2018 to February 8, 2019, characteristics of the element composition of PM_2.5 at Wangdu in rural North China were analyzed. The results showed that during the sampling period, Wangdu was severely polluted by PM_2.5, and the average concentration of PM_2.5 was (186.6±142.0)μg/m³. The most important elements in PM_2.5 were S, Cl, and K, and their average mass concentrations reached 1000ng/m³; followed by Al, Si, Ca, Fe and Zn, and their mass concentrations were in the range of 500~1000ng/m³; the mass concentration of the other elements was lower than 500ng/m³. Enrichment factors calculated by using Al as the reference elements showed that Si, Ca, Ti, and Fe were mainly from crustal source, K, Cr, Mn, Ni, Se, and Ba were affected by both crustal and anthropogenic sources and Cu, Zn, As, Ag, Cd, In, Sn, Pb mainly originated from anthropogenic sources. NMF (Non-Negative Matrix Factorization) was deployed to quantify the contribution of various potential emission sources to PM_2.5 in this study. Firework and firecracker, dust, vehicle exhaust, coal/biomass combustion, secondary aerosol and industrial process were identified as the main pollution sources, which contributed 2.6%, 1.7%, 6.5%, 39.7, 36.5% and 13%, respectively. The contribution of coal/biomass combustion at night and secondary aerosol formation during the day were the main causes of PM_2.5 pollution. During the Spring Festival, firework and firecracker source would cause heavy pollution in rural areas. The enrichment factor of Ba appeared to be suitable as an indicator for firework and firecracker sources. The findings in this study could provide data support for source apportionment and control of fine particulate matters in winter rural North China.

Key words： PM_2.5 element enrichment factor source analysis coal combustion firework north China rural

Received: 20 February 2021

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	CHEN Hui
	WEI Ya-qi
	SHANG Xiao-na
	ZHU Chao
	WANG Chun-ying
	ZENG Li-min
	CHEN Jian-min

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CHEN Hui,WEI Ya-qi,SHANG Xiao-na等. Characteristics and sources of elemental components of fine particulate matter in winter rural areas of North China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(11): 5027-5035.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I11/5027

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