title: A correlation of secondary aerosol (nitrate and sulfate) with respirable particulate matter (RPM) in ambient air at different traffic junctions of Vadodara city.
abstract: The correlation study of secondary aerosol (nitrate and sulfate) with RPM in ambient air at different traffic junctions of Vadodara city is reported. RPM was analyzed using Ion Chromatography technique and measured the level of nitrate and sulfate in ambient air. The correlation studies of these particulates with RPM have been established. The average concentration of sulfate and nitrate in ambient air was found 35.74 microg/m3 and 24.22 microg/m3, which ranged of 5.33-84.69 and 1.93-77.86 microg/m3 respectively. The correlation of RPM and SO4 (r = 0.813, P<0.01), RPM-NO3 (r = 0.5549, P<0.01) and SO4-NO3 (r = 0.6133, P<0.01) were found significant. The presence of sulfate and nitrate in RPM is 8.25% and 5.60% . The pH of water extract of RPM averaged 6.81, which ranged 6.17-7.28. Regression analysis result showed that the relationship between RPM-SO4 was significantly (R2=0.66215) correlated. This indicate that probably the secondary aerosols such as nitrate and sulfate in excess may cause irritation and increasing lung disease.
authors.affiliation: National Institute of Occupational Health, Meghani Nagar, Ahmedabad 380 016, India. sukeshnr_sinha@yahoo.com
authors.forename: S N
authors.initials: SN
authors.lastname: Sinha
authors.forename: T S
authors.initials: TS
authors.lastname: Patel
authors.forename: S H
authors.initials: SH
authors.lastname: Shah
authors.forename: N M
authors.initials: NM
authors.lastname: Desai
authors.forename: G M
authors.initials: GM
authors.lastname: Patel
authors.forename: M M
authors.initials: MM
authors.lastname: Mansuri
authors.forename: H N
authors.initials: HN
authors.lastname: Saiyed
mesh_terms: D000336:Aerosols / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis*; D002947:Cities; D004391:Dust / Q000032:analysis*; D004784:Environmental Monitoring; D007194:India; D009566:Nitrates / Q000032:analysis*; D010316:Particle Size; D013431:Sulfates / Q000032:analysis*; D001335:Vehicle Emissions
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D004391:Dust; D009566:Nitrates; D013431:Sulfates; D001335:Vehicle Emissions