caa a22 4500 46790300X CHVBK 20180406152824.0 cr unu---uuuuu 170328e20060601xx s 000 0 eng 10.1007/s10661-006-0988-6 doi (NATIONALLICENCE)springer-10.1007/s10661-006-0988-6 Chemical Composition of Atmospheric Aerosol (PM10) at a Semi-arid Urban Site: Influence of Terrestrial Sources [Elektronische Daten] [P. Mouli, S. Mohan, S. Reddy] Atmospheric aerosol (PM10) measurements were made at a regional representative semi-arid urban site, Tirupati, India over one-year period i.e. from October, 2001 to September, 2002. The samples were collected on polyflex filters, and analyzed for the major water-soluble ions - F, Cl, NO3, SO4, Na, NH4, K, Ca and Mg, employing ion chromatograph. The average mass of PM10 is found to be 32.75 μg/m3 with a total water-soluble aerosol load (total anion + total cation) of 13.56 μg/m3. Composition of aerosol showed higher concentration of SO4 followed by Na, Ca and NO3. Very good correlation is observed between crustal ions Ca and Mg (r=0.82) as well as between crustal and acidic ions; Ca and SO4 (r=0.75) and NO3 (r=0.67) and Mg and NO3 (r=0.78) and SO4 (r=0.73), suggest that the ionic composition was influenced by local terrestrial sources. The presence of SO4 and NO3 may be due to re-suspension of soil particles (formation by heterogeneous oxidation). Ca, Mg and Na are mainly soil derived ones. Correlation matrix with meteorological factors, as well as seasonal distribution of PM10 and its ionic components present a clear trend of higher concentrations during summer due to greater particle release and lowering atmospheric levels during the rainy season due to washout effect. ANOVA results showed the significant variation of composition from season to season. Paired comparisons (DMRT) revealed the occurrence of significant difference in pairs of mean concentration from season to season except within monsoon i.e. between S-W and N-E monsoon. Springer Science + Business Media, Inc., 2006 aerosol nationallicence India nationallicence major inorganic ions nationallicence meteorological factors nationallicence sources nationallicence Mouli P. Electrochemical Research Laboratories, Department of Chemistry, Sri Venkateswara University, 517 502, Tirupati, India aut Mohan S. Biochemical and Environmental Engineering Center, Indian Institute of Chemical Technology, 500 007, Hyderabad, India aut Reddy S. Electrochemical Research Laboratories, Department of Chemistry, Sri Venkateswara University, 517 502, Tirupati, India aut Environmental Monitoring and Assessment Kluwer Academic Publishers 117/1-3(2006-06-01), 291-305 0167-6369 117:1-3<291 2006 117 10661 https://doi.org/10.1007/s10661-006-0988-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-006-0988-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mouli P. Electrochemical Research Laboratories, Department of Chemistry, Sri Venkateswara University, 517 502, Tirupati, India aut NATIONALLICENCE 700 1- Mohan S. Biochemical and Environmental Engineering Center, Indian Institute of Chemical Technology, 500 007, Hyderabad, India aut NATIONALLICENCE 700 1- Reddy S. Electrochemical Research Laboratories, Department of Chemistry, Sri Venkateswara University, 517 502, Tirupati, India aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 117/1-3(2006-06-01), 291-305 0167-6369 117:1-3<291 2006 117 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer