Associations between particle physicochemical characteristics and oxidative capacity: An indoor PM10 study in Beijing, China

Shao, Longyi; Li, Jinjuan; Houyin, Zhao; Lĭ, Hui; Li, Weijun; Jones, Tim; Sexton, Keith John; Bérubé, Kelly Ann

doi:10.1016/j.atmosenv.2007.02.038

Cited by 48 publications

(48 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In contrast, the TD 20 values of PM 10 samples displayed a strong negative correlation with the total analyzed water-soluble metal concentrations (Pearson correlation coefficient of -0.854), implying that the oxidative capacity of Lanzhou PM 10 is derived mainly from its water-soluble fractions. This finding is consistent with other reports from Beijing (Shao et al, 2006(Shao et al, , 2007 and for UK particulate matter (Moreno et al, 2004;Merolla and Richards, 2005).…”

Section: Correlation Between Heavy Metal Concentration and Bioreactivitysupporting

confidence: 83%

“…Previous studies have indicated that Zn is likely to be the major element responsible for plasmid DNA damage (Greenwell et al, 2002;Shao et al, 2006;Lu et al, 2006;Shao et al, 2007), which is in agreement with the results presented in this study.…”

Section: Correlation Between Heavy Metal Concentration and Bioreactivitysupporting

confidence: 83%

“…Extensive research into ambient particulate matter, combustion emission particulates, residual oil fly ash, and diesel exhaust particles has shown that soluble heavy metal components produce reactive oxygen species (ROS), which can induce oxidative stress and inflammation in the lungs and respiratory tract (Dreher et al, 1997;Lambert et al, 2000;Risom et al, 2005;de Kok et al, 2006;Park et al, 2006;See et al, 2007;DiStefano et al, 2009;Vidrio et al, 2009;Zhong et al, 2010). Moreno et al (2004) and Shao et al (2006Shao et al ( , 2007 suggested that soluble Zn might be the primary component responsible for oxidative damage of DNA. Furthermore, Lu et al (2008) suggested that heavy metals in Shanghai PM 2.5 , including Cu, Zn, Pb, Cd, Cr, Mn, and Ni, might have synergic effects on plasmid DNA damage.…”

Section: Introductionmentioning

confidence: 99%

“…This method has been used to evaluate the bioreactivity of urban airborne particles and diesel exhaust particles in many cities (Greenwell et al, 2002(Greenwell et al, , 2003Moreno et al, 2004;Whittaker et al, 2004;Shao et al, 2006Shao et al, , 2007. The plasmid assay is based on the principle that any free radicals on the particle surface can cause oxidative stress on the supercoiled DNA.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Heavy Metal Compositions and Bioreactivity of Airborne PM10 in a Valley-Shaped City in Northwestern China

Xiao

Shao

Zhang³

et al. 2013

Aerosol Air Qual. Res.

Self Cite

View full text Add to dashboard Cite

Lanzhou, a valley-shaped city in northwestern China, experiences heavy air pollution. This study investigated the relationship between the oxidative capacity and heavy metal composition of the PM 10 in Lanzhou. Inductively coupled plasma-mass spectrometry (ICP-MS) was used to examine the heavy metal element composition and an in vitro plasmid assay was employed to study the bioreactivity of airborne PM 10 . The monitoring data revealed that the mass concentration of Lanzhou PM 10 exhibited seasonal variations at both the urban and suburban sites, with higher values in winter and spring, lower values in autumn, and the lowest ones in summer. The results of ICP-MS analysis showed that Zn was the metal present in the highest concentrations in both the whole and water-soluble fractions of PM 10 collected at both the urban and suburban sites, followed by Fe, Pb, and Mn. Furthermore, the results indicated that Zn, Cd, and As were present mostly in their soluble forms, while the Fe, Pb, and V were primarily in their insoluble ones. The plasmid DNA assay results indicated that the TD 20 values (toxic dosages of PM 10 causing 20% of plasmid DNA damage) of the Lanzhou PM 10 collected at both the urban and suburban sites ranged from 10 μg/mL to over 1000 μg/mL, and exhibited seasonal variations. The TD 20 values were high in spring and autumn, and thus the toxicities were low, while the TD 20 values were low in winter and summer, and thus the toxicities were high. For PM 10 collected at both the urban and suburban sites, the high concentrations of water-soluble Zn, Fe, Pb, and Mn displayed a strong negative correlation with the TD 20 values, suggesting that these metals were likely the major elements responsible for plasmid DNA damage. In addition, meteorological conditions (i.e., lower wind speed and higher relative humidity) during the sampling periods may have caused an indirect increase in oxidative damage to DNA.

show abstract

Section: Correlation Between Heavy Metal Concentration and Bioreactivitysupporting

confidence: 83%

Section: Correlation Between Heavy Metal Concentration and Bioreactivitysupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heavy Metal Compositions and Bioreactivity of Airborne PM10 in a Valley-Shaped City in Northwestern China

Xiao

Shao

Zhang³

et al. 2013

Aerosol Air Qual. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Beeson et al (1998) suggest that exposure to airborne particles increases the risk of developing lung cancer. There is also evidence that PM 10 and its soluble fractions can induce alterations in DNA (Villalobos et al, 1995;Shao et al, 2006Shao et al, , 2007Lü et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Oxidative capacities of size-segregated haze particles in a residential area of Beijing

Sun¹,

Shao²,

Mu³

et al. 2014

Journal of Environmental Sciences

Self Cite

View full text Add to dashboard Cite

Characteristic, composition, and sources of TSP investigated by HRTEM/EDS and ESEM/EDS

Zhai

Wang

et al. 2011

Environ Monit Assess

View full text Add to dashboard Cite

Total suspended particle (TSP) collected at the fifth floor of House Dust in Hunan University, China, was analyzed in terms of microscopic morphology and chemical composition. The fine particles (50 nm-2 μm) in the TSP were analyzed by a high-resolution transmission electron microscope equipped with an energy-dispersive X-ray analyzer (HRTEM/EDS). Results showed that the particles were in shapes of plate, irregular and agglomerate. Based on EDS results, these fine particulate matter was primarily composed of Fe-rich (35.82-61.29%), Ca-rich (30.18-36.77%) and Si-rich (18.95-32.28%) particles. Other elements mainly including Mg (0.47-4.97%), Al (0.45-14.57%), S (0.45-4.73%), K (1.13-2.13%) and Zn (0.67-3.85%) were also observed. The sources analysis indicated that the HRTEM particles mainly originated from coal combustion, traffic emission, vehicles exhaust emission and fugitive soil or cement particulate matter. The coarse particles (4-50 μm) were detected by environmental scanning electron microscopy coupled with energy-dispersive X-ray detector (ESEM/EDS). Based on a simple algorithm, ESEM particles were categorized into five groups: C-bearing (46.15%, 67% and 86.98%), Si + Ca-bearing (21.48 + 11.80%, 16.51 + 10.81% and 16.32 + 10.62%), Si + Al-bearing (20.06 + 12.40%, 20.16 + 11.22% and 15.31 + 11.25%), Si-bearing (34.40%, 26.92% and 27.15%) particles and aggregates, most of which exhibit obvious crystalline structure, and these ESEM particles mainly derived from vehicles exhaust emission, coal combustion, soil, and biomass burning, while the aggregates are indicative of atmospheric reaction progress. HRTEM/EDS and ESEM/EDS are mutual complementary in analyzing the characteristic and determining the sources of TSP.

show abstract

Associations between particle physicochemical characteristics and oxidative capacity: An indoor PM10 study in Beijing, China

Cited by 48 publications

References 30 publications

Heavy Metal Compositions and Bioreactivity of Airborne PM10 in a Valley-Shaped City in Northwestern China

Heavy Metal Compositions and Bioreactivity of Airborne PM10 in a Valley-Shaped City in Northwestern China

Oxidative capacities of size-segregated haze particles in a residential area of Beijing

Characteristic, composition, and sources of TSP investigated by HRTEM/EDS and ESEM/EDS

Contact Info

Product

Resources

About