Abstract
Weekly passive sampling of ambient ammonia has been performed at ground or rooftop levels at 12 locations in Hong Kong representing different land use categories. The highest weekly average roadside level of ammonia in Hong Kong was 7.1 μg m-3 at a street canyon site. Ambient ammonia concentrations for a rooftop urban-residential site with nearby light traffic were -3, being less than at an adjacent road and indoor car-park. Rooftop levels of ammonia showed a significant correlation with nitrogen monoxide concentrations. Honeycomb denuder samplings were also carried out at the rooftop site and the results were consistent with passive sampling. It is concluded that the 0.54 M vehicles in Hong Kong make a considerable contribution to ambient ammonia concentrations, which are otherwise low. © Springer-Verlag 2007.
| Original language | English |
|---|---|
| Pages (from-to) | 37-40 |
| Journal | Environmental Chemistry Letters |
| Volume | 7 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2009 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 11 Sustainable Cities and Communities
Research Keywords
- Ammonia emissions
- Asia
- Catalytic converter
- Honeycomb denuder
- Passive sampling
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