18 research outputs found
PM2.5 chemical source profiles of emissions resulting from industrial and domestic burning activities in India
A study has been performed to develop PM2.5 (particles with aerodynamic diameters ā¤ 2.5) chemically speciated source profiles of different industrial and domestic burning practices in India. A total of fifty-five PM2.5 samples have been collected in emissions resulting from (1) industrial furnaces, (2) household fuels, (3) municipal solid waste burning, and (4) welding workshop burning practices, and categorized for eleven subtypes of sources. The collected samples were subjected to chemical analysis for twenty-one elemental (Al, As, Ca, Cd, Co, Cr, Cu, Fe, Hg, K, Mg, Mn, Mo, Na, Ni, Pb, S, Sb, Se, V, Zn), nine ionic (Na+, K+, Mg2+, Ca2+, NH4+, Clā, Fā, NO3ā, SO42ā), OC, and EC source indicator species using atomic absorption spectrometry, ion chromatography and carbon analysis (thermal/optical transmittance method), respectively. The carbonaceous fraction was most abundant in household fuel burning emissions (47.6 Ā± 7.45% to 65.92 Ā± 13.13%). The ionic/elemental ratios of major inorganic constituents (Ca2+/Ca, Mg2+/Mg and Na+/Na) have been identified to describe the PM2.5 emissions from combustion or re-suspension dusts during industrial activities. Brick Kiln processes (BKP) have been identified as the major emitter of the highest number of toxic species (Cd, Co, Mo, Sb and V), followed by steel re-rolling mills (Hg and Pb) and steel processing industries (As, Ni). The source marker calculations also confirmed that K+, Mn, and As are good markers for biomass burning, metallurgical industrial emission, and coal burning, respectively, similar to the findings in previous studies
Procjena i vrednovanje PM2.5 u vanjskom okoliÅ”u u odnosu na njegove zdravstvene uÄinke u industrijskim podruÄjima u kojima se koristi mineralni ugljen
Atmospheric PM2.5 pollution, has shown potential impact on the human health in general, thus it requires to look into the chemical characteristics of PM2.5 masses for designing effective policies to reduce health risks amongst public under exposure. The study carried out, here, has presented the ambient PM2.5 concentrations, concentrations of chemical components and associated health risks over rural and urban environments in the area of mineral based coal-fired industrial areas of central India for a period of one year (2015ā16).
Overall 260 PM2.5 samples, collected from rural, urban and industrial sites, were analyzed for various elements Al, As, Ca, Hg, Cr, Co, Cu, Fe, Mn, K, Cd, Mo, Ni, Pb, Se, Sb, Na, Mg, K, V and Zn, ions such as Na+, Mg2+, K+, Ca2+, Fā, Clā, NH4+, NO3ā, SO42ā and carbonaceous matter. The annual average PM2.5 mass concentrations were found to be ~2 to ~6 folds higher than the annual National Ambient Air Quality standard (40 Āµg mā3). Further this study also evaluates, carcinogenic and non-carcinogenic health risks associated with ambient PM2.5 exposures (via ingestion, inhalation and dermal). The elemental species that have shown non-carcinogenic risks for both children and adults of all three sites are: Co, Mn, Ni (rural), As, Cd, Cr, Mn, Ni, V (urban and industrial sites). Similarly, the excess carcinogenic risks, in total, from Cd, Co, Cr, Ni, Pb was found to be higher than acceptable limits (10ā6 to 10ā4).OneÄiÅ”Äenje atmosfere lebdeÄim Äesticama (PM2.5) pokazalo je potencijalni utjecaj na zdravlje ljudi opÄenito. Stoga je potrebno sagledati kemijska svojstva Äestica PM2.5 kako bi se postiglo uÄinkovito smanjenje zdravstvenih rizika izložene populacije. U ovome radu prikazuju se rezultati studije koncentracija PM2.5 i koncentracija kemijskih sastojaka u lebdeÄim Äesticama za jednogodiÅ”nje razdoblje (2015.ā2016.) koji su povezani sa zdravstvenim rizicima u ruralnim i urbanim sredinama u industrijskim podruÄjima u srediÅ”njoj Indiji u kojima se koristi mineralni ugljen kao pogonsko industrijsko gorivo. Ukupno je analizirano 260 uzoraka PM2.5 s ruralnih, urbanih i industrijskih lokacija za razliÄite elemente: Al, As, Ca, Hg, Cr, Co, Cu, Fe, Mn, K, Cd, Mo, Ni, Pb, Se , B, Na, Mg, K, V i Zn, ione poput Na+, Mg2+, K+, Ca2+, Fā, Clā, NH4+, NO3ā, SO42ā i spojeve ugljika. UtvrÄeno je da su prosjeÄne godiÅ”nje masene koncentracije PM2.5 od ~2 do ~6 puta viÅ”e od dopuÅ”tenih godiÅ”njih vrijednosti prema indijskom Nacionalnom standardu kvalitete zraka (40 Āµgmā3). Nadalje, ova studija takoÄer ocjenjuje kancerogene i nekancerogene rizike za zdravlje povezane s izloženoÅ”Äu Äesticama PM2.5 u okoliÅ”u (putem gutanja, udisanja i dodira s kožom). Elementi koji su pokazali nekancerogene rizike i za djecu i za odrasle na sve tri lokacije su: Co, Mn, Ni (ruralno podruÄje), As, Cd, Cr, Mn, Ni i V (urbano i industrijsko podruÄje). SliÄno, utvrÄen je poveÄan kancerogeni rizik za Cd, Co, Cr, Ni i Pb, koji je veÄi od prihvatljivih granica (10ā6 do 10ā4)
Cultural and Ritual Burning Emission Factors and Activity Levels in India
Real-world particulate matter, organic carbon, and elemental carbon (OC and EC) emission measurements were measured for different cultural and ritual services. These were (g/kg): 11.36 (OC), 0.27 (EC) and 31.04 (RPM) of Marriage Events
Size-segregated chemical source profiles and potential health impacts of multiple sources of fugitive dust in and around Bhopal, central India
Source Profiles for PM10-2.5 Resuspended Dust and Vehicle Exhaust Emissions in Central India
Eight composite PM10-2.5 source profiles were developed for resuspended dust and vehicle exhaust emissions with 32 chemical species, including 21 elements (Al, As, Ca, Cd, Co, Cr, Cu, Fe, Hg, K, Mg, Mn, Mo, Na, Ni, Pb, S, Sb, Se, V, and Zn), 9 water-soluble ions (Na+, K+, Mg2+, Ca2+, NH4 +, Cl-, F-, NO3-, and SO42-), and carbonaceous fractions (OC and EC). Dust samples were dominated by crustal elements (Al, Ca, Fe, and Mg) while exhaust emissions showed high abundances of carbonaceous aerosol (OC and EC). Crustal species (Al, Fe, Mg, and Na) were more enriched over native soils in PM10-2.5 as compared to PM2.5. The higher coefficients of divergence (COD) indicate that profiles differ from each other. Ca accounted for nearly 30% of PM10-2.5 mass in construction dust while Fe accounted for nearly 20% of PM10-2.5 mass in paved road dust. Three-and four-wheeler diesel exhaust profiles consisted of 5-7% EC, with 6-10 times higher Pb, Se, and S abundances than those in two-wheeler gasoline exhaust profile. The heavy-duty diesel exhaust profile consist of nearly 20% EC with abundant (> 0.5%) trace elements (e.g., Pb, Se, and Zn)
Coarse particle (PM10ā2.5) source profiles for emissions from domestic cooking and industrial process in Central India
To develop coarse particle (PM10ā2.5, 2.5to10Ī¼m) chemical source profiles, real-world source sampling fromfour
domestic cooking and seven industrial processing facilities were carried out in āRaipur-Bhilaiā of Central India.
Collected samples were analysed for 32 chemical species including 21 elements (Al, As, Ca, Cd, Co, Cr, Cu, Fe,
Hg, K, Mg, Mn, Mo, Na, Ni, Pb, S, Sb, Se, V, and Zn) by atomic absorption spectrophotometry (AAS), 8 water-soluble
ions (Na+, K+, Mg2+, Ca2+, Clā, Fā, NO3
ā, and SO4 2ā) by ion chromatography, ammonium (NH4
+) by spectrophotometry,
and carbonaceous fractions (OC and EC) by thermal/optical transmittance. The carbonaceous
fractions were most abundant fraction in household fuel and municipal solid waste combustion emissions
while elemental speciesweremore abundant in industrial emissions.Most of the elemental specieswere enriched
in PM2.5 (b2.5 Ī¼m) size fraction as compared to the PM10ā2.5 fraction. Abundant Ca (13ā28%) was found in steelrollingmill
(SRM)and cement production industry (CPI) emissions, with abundant Fe (14ā32%) in ferro-manganese
(FEMNI), steel production industry (SPI), and electric-arc welding emissions. High coefficients of divergence (COD)
values (0.46 to 0.88) among the profiles indicate their differences. These region-specific source profiles aremore relevant
to source apportionment studies in India than profiles measured elsewhere