Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3),Department of Environmental Science and Engineering,Fudan University,Shanghai 200433,China;
Shanghai Environmental Monitoring Center,Shanghai 200030,China;
Pudong New District Environmental Monitoring Station,Shanghai 200122,China;
Chinese Research Academy of Environmental Sciences,Beijing 100012,China;
IRDR ICoE on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health,Fudan University,Shanghai 200433,China;
Institute of Eco-Chongming(IEC),Shanghai 202162,China;
COVID-19 lockdown; PM_(2.5)-bound elemental species; Source apportionment; Health risk; Shanghai;