2007
Evolution of anthropogenic aerosols in the coastal town of Salina Cruz, Mexico: Part III Size-segregated elemental composition analyzed by total-reflection x-ray fluorescence spectrometry
LAMMEL, Gerhard, Darrel G BAUMGARDNER, Ursula EA FITTSCHEN a Birgit PESCHELZákladní údaje
Originální název
Evolution of anthropogenic aerosols in the coastal town of Salina Cruz, Mexico: Part III Size-segregated elemental composition analyzed by total-reflection x-ray fluorescence spectrometry
Název česky
Evolution of anthropogenic aerosols in the coastal town of Salina Cruz, Mexico: Part III Size-segregated elemental composition analyzed by total-reflection x-ray fluorescence spectrometry
Autoři
LAMMEL, Gerhard (276 Německo, garant), Darrel G BAUMGARDNER (840 Spojené státy), Ursula EA FITTSCHEN (276 Německo) a Birgit PESCHEL (276 Německo)
Vydání
International Journal for Environmental Analytical Chemistry, Taylor & Francis, 2007, 1029-0397
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
30304 Public and environmental health
Stát vydavatele
Německo
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 1.026
Kód RIV
RIV/00216224:14310/07:00035362
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000246951500005
Klíčová slova česky
Total-reflection X-ray fluorescence spectrometry; Atmospheric aerosols; Heavy metals; Air pollution; Particle-size distribution; Subtropics
Klíčová slova anglicky
Total-reflection X-ray fluorescence spectrometry; Atmospheric aerosols; Heavy metals; Air pollution; Particle-size distribution; Subtropics
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 10. 4. 2009 13:18, prof. Gerhard Lammel, PhD.
V originále
Heavy metals in various size modes of the atmospheric aerosol are a concern for human health. Their and other elements concentrations are indicative for anthropogenic and natural aerosol sources. Si, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Br, Rb, Sr, Hg, and Pb were determined as a complementary contribution to a study on aerosol cycling during the wet season, June 2004, in a humid, subtropical climate, i.e. in the city of Salina Cruz, situated on the Pacific coast of the Isthmus of Tehuantepec (16.2degN, 95.2degW), Mexico. For mass (gravimetry) and elemental analyses, particles were collected by a Berner low-pressure round nozzle cascade impactor using four stages corresponding to 0.1 to 0.25, 0.25 to 1.0, 1.0 to 4.0, and 4 to 16 mm of aerodynamic particle size. The impaction plates were modified such that approx. 1/6 consisted of a plastic support (Persplex) for total reflection X ray fluorescence spectrometry (TXRF). The elements total content was determined by TXRF without any further sample pretreatment. Limits of quantification (LOQ) for elemental content in individual impactor stages corresponded to 25 to 60 ng/m3 for Si, 0.8 to 4 for Cl, K, Ca, Ti, and V, 3 to 20 pg/m3 for Cr, Mn, Fe, Cu, Ni, and Zn; and 7 to 50 pg/m3 for As, Se, Br, Rb, Sr, Hg, and Pb. In some samples, however, high blank values for the supports gave an LOQ 6 to 19 ng/m3 for Cl, 3 to 7 for Ca, 3 to 7 for Fe, Ni, Cu, and Zn; and 60 to 70 ng/m3 for Pb. The influence of local natural, industrial, and vehicle traffic sources for heavy metal mobilization was obvious. Heavy metal abundances did not coincide with regionally distributed pollutants. V and Ni were found at particularly elevated levels advected with the sea breeze, which points to ships as sources. Br and Pb were found at particularly low levels. The concentrations of Br, Rb, Sr, and Pb were found below LOQ at least in some, As, Co, Se, and Hg in all of the samples. The elements characteristic differences in mass size distributions were obvious despite the coarse size resolution. During the cycling of air masses from land to sea and back again, enrichment of supermicrometre particles in the near ground aerosol was observed under dry weather conditions. Rain preferentially removed the large particles with which heavy metals have been associated.
Česky
Si, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Br, Rb, Sr, Hg, and Pb were determined as a complementary contribution to a study on aerosol cycling during the wet season, June 2004, in a humid, subtropical climate, i.e. in the city of Salina Cruz, situated on the Pacific coast of the Isthmus of Tehuantepec (16.2degN, 95.2degW), Mexico.
Návaznosti
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