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Why ultrafines? Dr Lei Dong Presented by Mr Markku Rajala A Company

Why ultrafines? Dr. Lei Dong presented by Markku Rajala

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Page 1: Why ultrafines? Dr. Lei Dong presented by Markku Rajala

Why  ultrafines?    

Dr  Lei  Dong  Presented  by  Mr  Markku  Rajala  

A Company

Page 2: Why ultrafines? Dr. Lei Dong presented by Markku Rajala
Page 3: Why ultrafines? Dr. Lei Dong presented by Markku Rajala

>1  billion  people  suffer  from  poor  air  quality  every  day  每天有超过10亿人不得不生活在恶劣空气的环境中  

Page 4: Why ultrafines? Dr. Lei Dong presented by Markku Rajala
Page 5: Why ultrafines? Dr. Lei Dong presented by Markku Rajala
Page 6: Why ultrafines? Dr. Lei Dong presented by Markku Rajala
Page 7: Why ultrafines? Dr. Lei Dong presented by Markku Rajala
Page 8: Why ultrafines? Dr. Lei Dong presented by Markku Rajala

With  same  parDcle  mass  you  may  get  very  different  number  and  surface  area  of  parDcles  into  your  lungs  即使吸入肺部的颗粒物的质量一样,但是颗粒物的数量及表面积可能完全不一样  

Page 9: Why ultrafines? Dr. Lei Dong presented by Markku Rajala

Different  size  parDcle  affect  your  lungs  differently  不用大小的颗粒物对肺部有不同的影响  

Page 10: Why ultrafines? Dr. Lei Dong presented by Markku Rajala

OpDcal  sensors  do  not  measure  <300  nm  parDcles  –  and  β-­‐sensors  are  insensiDve  to  small  parDcles  传统光学传感器监测不到小于300纳米的颗粒物  β- 射线法传感器对细微颗粒反应不灵敏  

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Particle  number  concentration  Beijing

Measurement range of optical particle sensors

Page 11: Why ultrafines? Dr. Lei Dong presented by Markku Rajala

Electrical  sensors  based  on  parDcle  charging  measure  all  parDcles  in  10  nm  –  2.5  µm  range  基于对颗粒物充电方法监测的电子传感器,可监测10纳米-­‐2.5微米的所有颗粒物  

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Measurement range of sensors based on electrical particle charging

Page 12: Why ultrafines? Dr. Lei Dong presented by Markku Rajala
Page 13: Why ultrafines? Dr. Lei Dong presented by Markku Rajala

Pegasor  Urban  Air  Monitoring  Equipment  佩卡索尔室外空气监测设备  

Page 14: Why ultrafines? Dr. Lei Dong presented by Markku Rajala
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Page 16: Why ultrafines? Dr. Lei Dong presented by Markku Rajala
Page 17: Why ultrafines? Dr. Lei Dong presented by Markku Rajala
Page 18: Why ultrafines? Dr. Lei Dong presented by Markku Rajala

Chargerpower

Electrometer

In = Iout - Iin

Iin

Iout

Sample in

Sample out

Isolated power transfer

Faraday cup

Aerosol charging

In

Pegasor’s  technology  佩卡索尔公司技术    

Page 19: Why ultrafines? Dr. Lei Dong presented by Markku Rajala

Future  –  direct  measurement  of  health  impact?  将来-­‐  直接测量对人体健康影响?    

Page 20: Why ultrafines? Dr. Lei Dong presented by Markku Rajala

Conclusions  总结  •  PM2.5  is  a  good  indica/on  of  pollu/on  but  it  underes/mates  the  health  effect  

caused  by  ultrafine  par/cles            PM2.5  是空气污染的重要指数,但是仅有PM2.5  的概念,低估了极细微颗粒

物对人体健康的影响  •  Par/cle  number  (PN)  and  par/cle  surface  area  (PA)  concentra/ons  are  

important  for  beAer  understanding  of  pollu/on  vs  health  effect            颗粒物数量浓度(PN)及颗粒物表面积浓度(PA)可以更好的理解污染及健

康影响  •  Measuring  PN/PA1  (and  especially  PN/PA0.1)  requires  new  measurement  

technology  based  on  electrical  charging  of  par/cles            测量PN/PA1  (尤其是PN/PA0.1)需要基于对颗粒物充电的电子技术  •  It  may  be  possible  to  develop  measurement  equipment  which  can  indicate  

the  poten/al  health  effect  of  par/culate  maAer   可以直接反应颗粒物对健康的潜在影响,开发监测设备成为可能  

Page 21: Why ultrafines? Dr. Lei Dong presented by Markku Rajala

Thank  You!      Pegasor  Oy  Hatanpään  valta/e  34  C,  FI-­‐33100  Tampere,  Finland    [email protected];  +86  136  6127  1971    www.  pegasor.fi