title: Composition of smoke generated by landing aircraft.
abstract: A combination of techniques has been used to examine the composition of smoke generated by landing aircraft. A sample of dust from the undercarriage from several commercial airliners was examined with SEM/EDX (Scanning Electron Microscope/Energy Dispersive X-ray) to determine its elemental composition and also with an aerosizer/aerodisperser in order to measure the particle size spectrum. The observed size spectrum was bimodal with equal numbers of particles at peaks of aerodynamic diameter ∼10 μm and ∼50 μm. The EDX analysis suggested that the former peak is carbonaceous, while the latter consists of elements typical of an asphalt concrete runway. In the field, a scanning Lidar, in combination with optical and condensation particle counters, was deployed to obtain limits to the number concentration and size of such particles. Most of the (strong) Lidar signal probably arose from the coarser 50 μm aerosol, while respirable aerosol was too sparse to be detected by the optical particle counters.
authors: Centre for Aviation, Transport and the Environment, School of Science and the Environment, Manchester Metropolitan University , Chester Street, Manchester M1 5GD, UK. m.bennett@mmu.ac.uk
authors: Michael
authors: M
authors: Bennett
authors: Simon M
authors: SM
authors: Christie
authors: Angus
authors: A
authors: Graham
authors: Bryony S
authors: BS
authors: Thomas
authors: Vladimir
authors: V
authors: Vishnyakov
authors: Kevin
authors: K
authors: Morris
authors: Daniel M
authors: DM
authors: Peters
authors: Rhys
authors: R
authors: Jones
authors: Cathy
authors: C
authors: Ansell
mesh_terms: D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D000397:Air Pollution / Q000706:statistics & numerical data; D000401:Aircraft / Q000706:statistics & numerical data*; D004784:Environmental Monitoring; D008855:Microscopy, Electron, Scanning; D012906:Smoke / Q000032:analysis*; D013052:Spectrometry, X-Ray Emission; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D012906:Smoke; D001335:Vehicle Emissions