2023
DOI: 10.1088/1748-9326/acb805
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Investigating atmospheric nitrate sources and formation pathways between heating and non-heating seasons in urban North China

Abstract: In urban North China, nitrate (NO3-) is a primary contributor to haze formation. So far, the production processes and source apportionments of atmospheric NO3- during the heating season (i.e., the wintertime) have not yet been well understood. This study determined δ15N-NO3-, δ18O-NO3-, and Δ17O-NO3 of aerosol samples to compare the potential sources and formation pathways of atmospheric NO3- during heating (November to March) and non-heating (April to May) seasons. Combining stable isotope composition with t… Show more

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Cited by 8 publications
(1 citation statement)
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“…Under ammonium-poor conditions and during nighttime the hydrolysis of N 2 O 5 on the wet particles or droplets is also an important pathway that could generate particulate NO 3 − [ 57 ]. The primary natural sources of NO x are considered to be lightning, wildfires, soil microbial nitrogen cycle and stratospheric transmission, while anthropogenic sources of NO x are mainly fossil fuel combustion, biomass combustion, agricultural activities, vehicle exhaust and human waste [ 58 ]. In marine environments, NO 3 − may be partially present as NaNO 3 due to the partition reactions between HNO 3 and sea salt particles which mainly affects coarse particles (PM 10 ) rather than PM 2.5 [ 59 ].…”
Section: Resultsmentioning
confidence: 99%
“…Under ammonium-poor conditions and during nighttime the hydrolysis of N 2 O 5 on the wet particles or droplets is also an important pathway that could generate particulate NO 3 − [ 57 ]. The primary natural sources of NO x are considered to be lightning, wildfires, soil microbial nitrogen cycle and stratospheric transmission, while anthropogenic sources of NO x are mainly fossil fuel combustion, biomass combustion, agricultural activities, vehicle exhaust and human waste [ 58 ]. In marine environments, NO 3 − may be partially present as NaNO 3 due to the partition reactions between HNO 3 and sea salt particles which mainly affects coarse particles (PM 10 ) rather than PM 2.5 [ 59 ].…”
Section: Resultsmentioning
confidence: 99%