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Characterization of ionic composition of TSP and PM10 during the Middle Eastern Dust (MED) storms in Ahvaz, Iran

Shahsavani, A ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1007/s10661-011-2451-6
  3. Publisher: 2012
  4. Abstract:
  5. Because of the recent frequent observations of major dust storms in southwestern cities in Iran such as Ahvaz, and the importance of the ionic composition of particulate matters regarding their health effects, source apportionment, etc., the present work was conducted aiming at characterizing the ionic composition of total suspended particles (TSP) and particles on the order of ∼10 μm or less (PM10) during dust storms in Ahvaz in April-September 2010. TSP and PM10 samples were collected and their ionic compositions were determined using an ion chromatography. Mean concentrations of TSP and PM10 were 1,481.5 and 1,072.9 μg/m 3, respectively. Particle concentrations during the Middle Eastern Dust (MED) days were up to four times higher than those in normal days. Ionic components contributed to only 9.5% and 11.3% of the total mass of TSP and PM10, respectively. Crustal ions were most abundant during dust days, while secondary ions were dominant during non-dust days. Ca2+/ Na+ and Cl-/Na+ ratios can be considered as the indicators for identification of the MED occurrence. It was found that possible chemical forms of NaCl, (NH4)2SO4, KCl, K 2SO4, CaCl2, Ca(NO3)2, and CaSO4 may exist in TSP. Correlation between the anionic and cationic components suggests slight anion and cation deficiencies in TSP and PM10 samples, though the deficiencies were negligible
  6. Keywords:
  7. PM10 ; The Middle Eastern Dust storm ; Ahvaz ; Cationic components ; Chemical forms ; Health effects ; Ionic component ; Ionic composition ; Mean concentrations ; Particle concentrations ; Secondary ions ; Source apportionment ; Total mass ; Total suspended particles ; TSP ; Water-soluble ions ; Ammonia ; Ammonium sulfate ; Calcium chloride ; Calcium ion ; Calcium sulfate ; Chloride ion ; Fluoride ion ; Magnesium ion ; Nitrite ; Potassium chloride ; Potassium ion ; Potassium sulfate ; Sodium chloride ; Sodium ion ; Sulfate ; Anion ; Cation ; Concentration (composition) ; Correlation ; Dust storm ; Ion chromatography ; Suspended particulate matter ; Chemical composition ; Ion pair chromatography ; Air Pollutants ; Air Pollution ; Cities ; Dust ; Environmental Monitoring ; Ions ; Particulate Matter ; Seasons ; Ahwaz ; Iran ; Khuzestan
  8. Source: Environmental Monitoring and Assessment ; Volume 184, Issue 11 , November , 2012 , Pages 6683-6692 ; 01676369 (ISSN)
  9. URL: http://link.springer.com/article/10.1007%2Fs10661-011-2451-6