SciELO - Scientific Electronic Library Online

 
vol.67Exploration of the Potential of using a Virtual Laboratory for Chemistry Teaching at Secondary School Level in LesothoDetermination of Triclosan and Ketoprofen in River Water and Wastewater by Solid Phase Extraction and High Performance Liquid Chromatography índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Articulo

Indicadores

Links relacionados

  • En proceso de indezaciónCitado por Google
  • En proceso de indezaciónSimilares en Google

Compartir


South African Journal of Chemistry

versión On-line ISSN 1996-840X

Resumen

MKOMA, Stelyus L.; DA ROCHA, Gisele O.  y  DE ANDRADE, Jailson B.. Determination of Carboxylic Acids and Water-soluble Inorganic Ions by Ion Chromatography in Atmospheric Aerosols from Tanzania. S.Afr.j.chem. (Online) [online]. 2014, vol.67, pp. 0-0. ISSN 1996-840X.

Atmospheric aerosol samples of PM2,5 and PM10 were collected in April-May 2011 from a rural site in Tanzania and analyzed for water-soluble inorganic ions and low molecular weight carboxylic acids using ion chromatography. PM2,5 and PM10 low-volume samplers with quartz fibre filters were deployed and aerosol collections on a 24 h basis were made for each sampler. All samples were analyzed for carboxylates and inorganic ions by using ion chromatography. The results showed that mean mass concentration of PM2,5 and PM10 were 13 ± 3.5 µg m-3 and 16 ± 2.3 µg m-3, respectively. Mean concentrations of the total carboxylates were 23.7 ± 6.5 ng m-3 in PM2.5 and 36.4 ± 12 ng m-3 in PM10 whereas total water-soluble inorganic ions were 448 ± 88 ng m-3 and 646 ± 214 ng m-3, respectively. Oxalate and malonate in PM25 and acetate in PM10 were most abundant carboxylates accounting for 64 % and 62 % of total acids, respectively. Mg2+ was most important cation in PM25 and PM10 accounting for 44 % and 24 % of total water-soluble ions, respectively, whereas SO42- was the main anionic component accounting for 23 % of total ions species in PM25 and 37 % in PM10. Using source indicators, we found photochemical activities, biogenic and biomass burning could possibly be important source types for aerosols in Tanzania.

Palabras clave : PM2.5; PM10; aerosol particles; organic acids; sources; Tanzania.

        · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License