Real-World Emission Characteristics of Environmentally Persistent Free Radicals in PM2.5from Residential Solid Fuel Combustion

Zhao，Jinfeng1; Shen，Guofeng2; Shi，Lin1; Li，Hao1; Lang，Di1; Zhang，Lu2; Pan，Bo1; Tao，Shu2,3

2021

10.1021/acs.est.1c08449

ENVIRONMENTAL SCIENCE & TECHNOLOGY   影响因子和分区

0013-936X

1520-5851

Environmentally persistent free radicals (EPFRs) can induce reactive oxygen species, causing adverse health impacts, and residential fuel (biomass and coal) combustion is believed to be an important emission source for EPFRs; however, the residential emission characteristics of EPFRs are rarely studied in the real world. Here, we conducted a field campaign evaluating the presence and characteristics of EPFRs generated from residential biomass and coal burning in rural China. The emission factors (EFs) of EPFRs (with units of 1020 spins·kg-1) in PM2.5 from the combustion of crop residues (3.97 ± 0.47) were significantly higher than those from firewood (2.06 ± 0.19) and coal (2.13 ± 0.33) (p < 0.05). The EPFRs from residential solid fuel combustion were carbon-centered free radicals adjacent to oxygen atoms. The fuel type was a primary factor controlling EPFR discharge, explaining 68% of the variation in EPFR EFs. The emissions from biomass burning had higher EPFRs per particle than those from coal combustion. EPFRs had stronger relationships with carbonaceous components than with other incomplete combustion products. The EPFRs from biomass burning were mostly generated during the pyrolysis of fuels, while the EPFRs generated from coal combustion were mainly associated with refractory organic compounds. This study provides valuable information for evaluating the fates of EPFRs, promoting a better understanding of the health impacts of air pollution.

biomass carbonaceous component coal EFs EPFRs

SCI ; EI

英语

NI论文

其他

National Natural Scientific Foundation of China[41725016,42077328,41763016] ; NSFC-NCN[41961134002]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000812109700001

AMER CHEMICAL SOC

20221211814961

Agricultural wastes ; Biomass ; Coal ; Coal combustion ; Housing ; Oxygen

Urban Planning and Development:403.1 ; Fuel Combustion and Flame Research:521 ; Solid Fuels:524 ; Chemical Products Generally:804 ; Agricultural Wastes:821.5

ENVIRONMENT/ECOLOGY

2-s2.0-85126547898

Scopus

1.Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control,Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming,Yunnan,650500,China
2.College of Urban and Environmental Sciences,Peking University,Beijing,100871,China
3.College of Environmental Science and Technology,Southern University of Science and Technology,Shenzhen,518055,China

Zhao，Jinfeng,Shen，Guofeng,Shi，Lin,et al. Real-World Emission Characteristics of Environmentally Persistent Free Radicals in PM2.5from Residential Solid Fuel Combustion[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2021,56(7):3997-4004.

Zhao，Jinfeng.,Shen，Guofeng.,Shi，Lin.,Li，Hao.,Lang，Di.,...&Tao，Shu.(2021).Real-World Emission Characteristics of Environmentally Persistent Free Radicals in PM2.5from Residential Solid Fuel Combustion.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56(7),3997-4004.

Zhao，Jinfeng,et al."Real-World Emission Characteristics of Environmentally Persistent Free Radicals in PM2.5from Residential Solid Fuel Combustion".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56.7(2021):3997-4004.