biostudies-literatureUnknownLi CLi BaiThe use of solid fuels for heating and cooking in rural Northeast China has led to severe indoor metal element pollution in particulate matter (PM), posing a direct threat to human health and creating immense pressure on the sustainability of residential environments. To investigate the levels, sources, and potential health hazards of indoor metal element pollution in this region, we conducted a year-long sampling and monitoring campaign in actual residential settings and used ICP-OES to measure six metal elements (Mn, Cr, Zn, Cu, Pb, and Ni). This study's findings reveal that indoor metal element pollution levels in PM (33,513.65 mg/kg per year) are higher in rural Northeast China compared to other rural areas. Straw burning is the primary source of metal element pollution, followed by moEnvironmental geochemistry and healthhttps://www.ebi.ac.uk/biostudies/studies/S-EPMC10035979biostudies-literatureStudy on metal elements in indoor particulate matter: a case study of rural residential environment in Northeast China.PMC100359792017YFC0702700Li CGuo YQin JBai LWang HXu XfalseStudy on metal elements in indoor particulate matter: a case study of rural residential environment in Northeast China.The use of solid fuels for heating and cooking in rural Northeast China has led to severe indoor metal element pollution in particulate matter (PM), posing a direct threat to human health and creating immense pressure on the sustainability of residential environments. To investigate the levels, sources, and potential health hazards of indoor metal element pollution in this region, we conducted a year-long sampling and monitoring campaign in actual residential settings and used ICP-OES to measure six metal elements (Mn, Cr, Zn, Cu, Pb, and Ni). This study's findings reveal that indoor metal element pollution levels in PM (33,513.65 mg/kg per year) are higher in rural Northeast China compared to other rural areas. Straw burning is the primary source of metal element pollution, followed by mo2023-01-01T00:00:00Z2023 Mar2025-04-26T13:05:26.675Z2025-02-19T04:00:19.904ZS-EPMC100359793695942910.1007/s10653-023-01543-6