Estimation of In Situ pH on PM 2.5 in Hong Kong Using Online Ionic ...

More documents

Recommendations

Info

Motivation for studying <strong>In</strong>-<strong>Situ</strong> <strong>pH</strong> Acid-catalyzed effects on SOA formation 2 [H + ] s Human health, cancer related 1 Conversion Acid deposition <strong>of</strong> insoluble iron to soluble Fe 3 <strong>In</strong>-situ <strong>pH</strong> 4 1:Sathiakumar, Critical Reviews in Toxicology, 1997; 2:Jang, Science, 2002; 3:Luo, JGR, 2005
<strong>Estimation</strong> <strong>of</strong> in-<strong>Situ</strong> <strong>pH</strong> using aerosol chemical composition data activity activity coefficient coefficient <strong>of</strong> H + , model output n H+ a H+ <strong>of</strong> H + , model output γ H+ ] <strong>pH</strong> IS = −loga −log[ γ × n × 1000× ρ / H + H H + + = m free free H + + in in mol mol m -3, -3, model model output output activity activity <strong>of</strong> <strong>of</strong> H + + in in mol mol L L -1 -1 in in aqueous aqueous particle particle m mass mass concentration concentration <strong>of</strong> <strong>of</strong> particle particle aqueous aqueous phase phase constituents constituents in in g g m -3 -3 ρ density density <strong>of</strong> <strong>of</strong> particle particle aqueous aqueous phase, phase, by by equations equations <strong>of</strong> <strong>of</strong> Tang Tang and and Munkelwiz Munkelwiz (1994) (1994) 5
Page 1 and 2: A Study of Acidity
Page 3: 1. Introduction: D
Page 7 and 8: 2. Validation of P
Page 9 and 10: 3. Sampling: Three observation peri
Page 11 and 12: 4. Results: PM 2.5 in-situ
Page 13 and 14: Period II: Cold front Conc (µg m -
Page 15 and 16: Principal Component Aanalysis: Iden
Page 17 and 18: Linear Regression: using NH 4+ /SO
Page 19 and 20: Comparison with in situ pH<
Page 21 and 22: Summary 1 PILS measurement provides

Estimation of In Situ pH on PM 2.5 in Hong Kong Using Online Ionic ...

Create successful ePaper yourself

Delete template?

Save as template?