The Solution to Pollutants

The Camfil Group is a world leader in the development and production of air filters and clean air solutions. We manufacture and supply products that satisfy all the demands at airports to control particulate and molecular pollutants. These products also satisfy the recommendations of EN13779.

The European standard EN 13779:2007 focuses on achieving a comfortable and healthy indoor environment in all seasons with acceptable installation and running costs. It is now a national standard in all countries. It specifies the required filter performance in a system to achieve good Indoor Air Quality (IAQ) taking into consideration the outdoor air.

The Solution to PollutantsVarious solutions are available depending on the extent of the pollution problem. Molecular filtration may be applied in either the fresh air make-up or recirculation air systems.

Solutions for makeup air are preferred since the principal sources of pollutant are external. These tend to be more heavy duty and reflect the high pollutant concentrations and one-pass operation. Solutions for recirculation applications reflect lower ambient concentrations and multi-pass operation. Continue reading

Oxford Street named one of the most polluted places in the world

Oxford Street is now officially known as the area with the highest known concentration of Nitrogen Dioxide (NO2) in the world. A toxic pollutant that can trigger asthma and heart attacks.

shutterstock_53878849Kamira /

Our country’s showcase shopping area has been named a world leader for diesel pollution due to the shopping strip being permanently congested with taxis and buses, whose diesel engines release large amounts of this gas.

We now know just how bad it is, however, for years’ retail and catering staff, office workers, council and utility workers, shoppers and tourists on this and other busy and polluted roads have been completely unaware of the dangers and risks associated with this invisible killer.

Successive Governments and Mayors have avoided the hard steps to tackle this blight that not only affects Oxford Street, but large swathes of London. Instead, the Government and civil service has downplayed the seriousness of the problem and systematically mislead both its own population and the European Commission. Continue reading

Contaminant Sources – Air Pollutants

Air pollution can be categorised as being either particulate (solids) or molecular (gas). Particles are induced into the human respiratory system through breathing. Gaseous or molecular pollution also enters the body in breathing air, but it is able to penetrate beyond the lungs, into the bloodstream and around the entire body.

Camfil - ContaminantsParticulate and molecular pollutants are both present at airports. The principal source is the combustion of fossil fuels.  Jet and diesel engines both release fine particulates in their exhaust. For jet engines the particulates result from incomplete combustion of kerosene fuel. Combustion efficiency reduces at lower engine power levels which are used during landing, taxiing and idling. Diesel engines release high levels of particulates at all duties.

The particulates result from the combustion of both fuel and engine oil.

Diesel particulates fall into several categories:

  • Dry particles or soot
  • Semi-volatile aerosols that have carbon nuclei with oily hydrocarbons condensed on the surface.
  • Carbon particles with sulphur acid molecules condensed on the surface. The sulphur arises for impurities in the fuel. Continue reading