PM0.5 linked to cardiovascular disease   

PM0.5登场PM2.5弱爆了 可引发心血管疾病

PM2.5尚未“尘埃落定”，PM0.5又被指危害人体健康。近日，复旦大学公共卫生学院、上海市大气颗粒物污染防治重点实验室研究证实，大气中粒径在0.25～0.5微米范围内的颗粒物(即PM0.5)的浓度与居民健康危害的关系最为显著，且粒径越小，健康危害更大。[查看全文]

(ECNS) -- Recent research led by a laboratory at Fudan University showed a close relationship between PM0.5 (particles smaller than 0.5 microns in diameter) and adverse health effects, Beijing Youth Daily reported.

The lab measured the concentrations of 23 particles ranging from 0.25 microns to 10 microns (PM0.25-PM10) in a city in China, finding that particles smaller than 0.5 microns showed the closest link with residents' health effects, and those bigger than 0.5 microns but smaller than 2.5 microns didn't show significant links.

Professor Yang Xin, a member of the research group, explained it is possible that people inhale more particles if they are smaller.

It may also be influenced by the settlement of different particles in the lower respiratory tract, Yang added.

Professor Kan Haidong, director of the research group, said PM0.5 can spread to the lung's air sac with air flow, then pass through the blood-air barrier into the cardiovascular system and cause cardiovascular disease (CVD).

It may also cause disruptions in people's nervous systems, according to Kan.

Nearly 90 percent of the mass concentration of PM2.5 is PM0.5, and most mainstream smoke that people inhale is PM0.5, Kan added.