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Spatial and temporal distribution, chemical characteristics, and sources of ambient particulate matter in the Beijing-Tianjin-Hebei region

Ambient Particulate MatterEnvironmental ChemistryEnvironmental MonitoringEngineeringEnvironmental EngineeringAtmospheric ScienceEnvironmental HealthUrban Air QualityAir QualitySource ApportionmentBeijing-tianjin-hebei RegionChemical CharacteristicsAir PollutionPollutant TransportParticulate MatterEarth ScienceImpurities