INVESTIGADORES
TUEROS Matias Jorge
congresos y reuniones científicas
Título:
Airborne Particles from Urban and Industrial Areas of La Plata (Argentina) and Leipzig (Germany)
Autor/es:
U. FRANNK; M.J.TUEROS; A. MULLER; L. MASSOLO; M. REHWAGEN; O. HERBARTH; A. RONCO
Lugar:
Buenos Aires, Argentina
Reunión:
Congreso; IV Reunión Latinoamericana de la Society of Environmental Toxicology and Chemistry (SETAC); 2001
Institución organizadora:
Society of Environmental Toxicology and Chemistry
Resumen:
Air pollution studies carried out in
La Plata and Leipzig from places under the influence of traffic, domestic and
industrial (petrochemical and oil refining processes) emissions and control
areas, included de sampling of fine, very fine and ultrafine particles in
outdoor air, the analysis of particle size and shape distribution, the chemical
characterization of semivolatile organic bound compounds (SVOCs), and the
biological effects of extracts assessed by means of cytotoxicity and
mutagenicity tests. Sampling methods were done by means of high volume samplers
with cascade impactors, (6 fractions from 10 mm to less than 0.45 mm) and isokinetic samplers. Methods of analysis
were: scanning electron microscopy and image analysis for particle effective
diameter and shape factor characterization for statistical description of
particles, EDX measurements for soot particle confirmatory testing, HPLC
(fluorescence/UV) for chemical analysis of Polycyclic Aromatic Compounds (PAH)
composition of SVOCs and laboratory toxicity tests (mutagenicity-
Ames/Salmonella TA98, S9+ and citotoxicity- Tetrahymena pyriformis cell
system) for the assessment of biological effects of organic extracts. Results
of the analysis of particle size distribution indicate a higher proportion of
ultrafine material in urban and industrial areas; while in blank sectors
coarser particle proportion dominate the PM 10. Although soot particles were detected
in all areas, a higher proportion was associated to urban and industrial
sectors. Eighty percent of PAHs detected are bound to particles smaller than
1.5 micrometers. The influence of industrial emissions were detected in the
urban area of La Plata.
Biological effects indicate highest mutagenic potency and cytotoxicity in
organic extracts from finest fractions. Results contribute with basic
information for future environmental and human risk assessment studies in the
regions.