中国南方乡村黑碳稳定同位素特征及来源解析——以江西于都为例

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Abstract In this study, PM_2.5 samples were collected in winter (January) and summer (July) 2018 at a remote site over the southern China. Black carbon (BC) concentrations of PM_2.5 and their stable carbon isotope (δ¹³C_BC) values, as well as water-soluble ion concentrations were analyzed. The results showed that the average concentrations of BC were (1.3±0.8) μg/m³and (0.8±0.3) μg/m³, while the average values of δ¹³C_BC were (-25.8±1.6)‰ and (-26.3±0.7)‰ in winter and summer respectively. Both BC concentrations and δ¹³C_BC showed high in winter and low in summer, suggesting that BC may be affected by different sources in different season. The results of Bayesian model showed that the fractional contributions of BC were 44.3% (28.8%) from biomass combustion, 29.3% (58.5%) from motor vehicle exhaust and 26.4% (12.7%) from coal combustion in winter(summer). The backward trajectories indicated that the BC in the background area of southern China may be affected by the long-distance transport from urban polluted areas.

Key words： PM_2.5 black carbon stable carbon isotope biomass burning nss-K⁺/BC

Received: 15 July 2020

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X513

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	Articles by authors
	HUANG Li-lei
	XIAO Hong-wei
	MAO Dong-yang
	ZENG Zi-qi
	WU Zuo-ting
	ZHU Ren-guo

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HUANG Li-lei,XIAO Hong-wei,MAO Dong-yang等. Source apportionment of black carbon stable isotope in a village of southern China—Take Yudu Jiangxi Province as example[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(2): 566-573.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I2/566

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