Dataset Information

Variation in Tree Species Ability to Capture and Retain Airborne Fine Particulate Matter (PM_2.5).

ABSTRACT: Human health risks caused by PM_2.5 raise awareness to the role of trees as bio-filters of urban air pollution, but not all species are equally capable of filtering the air. The objectives of this current study were: (1) to determine the foliar traits for effective PM_2.5-capture and (2) explore species-to-species differences in foliar PM_2.5-recapture capacity following a rain event. The study concluded that overall, the acicular needle shape made conifers more efficient with PM_2.5 accumulation and post-rainfall recapture than broadleaved species. The foliar shape and venation of broadleaved species did not appear to influence the PM_2.5 accumulation. However, the number of the grooves and trichomes of broadleaved species were positively related to foliar PM_2.5 accumulation, suggesting that they could be used as indicators for the effectiveness of tree PM_2.5 capture. Furthermore, the amount of PM_2.5 removal by rainfall was determined by the total foliar PM_2.5. Not all PM_2.5 remained on the foliage. In some species, PM_2.5 was resuspended during the growing season, and thus reduced the net particular accumulation for that species. These findings contribute to a better understanding of tree species potential for reducing PM_2.5 in urban environments.

SUBMITTER: Chen L

PROVIDER: S-EPMC5466687 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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Publications

Variation in Tree Species Ability to Capture and Retain Airborne Fine Particulate Matter (PM2.5).

Chen Lixin L Liu Chenming C Zhang Lu L Zou Rui R Zhang Zhiqiang Z

Scientific reports 20170609 1

Human health risks caused by PM2.5 raise awareness to the role of trees as bio-filters of urban air pollution, but not all species are equally capable of filtering the air. The objectives of this current study were: (1) to determine the foliar traits for effective PM2.5-capture and (2) explore species-to-species differences in foliar PM2.5-recapture capacity following a rain event. The study concluded that overall, the acicular needle shape made conifers more eff ...[more]

PMID: 28600533

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Project description:The main objective of this study was chemical characterization and source apportionment of the oxidative potential of ambient PM2.5 samples collected in an urban background area in Athens, Greece. Ambient PM2.5 samples were collected during the summer (June-September) of 2017 and winter (February-March) of 2018 at a residential, urban background site in the outlying neighborhood of the Demokritos National Laboratory in Athens, Greece. The collected PM samples were analyzed for their chemical constituents including metals and trace elements, water-soluble organic carbon (WSOC), elemental and organic carbon (EC/OC), and marker of biomass burning (i.e., levoglucosan). In addition, the DCFH in vitro assay was performed to determine the oxidative potential of the PM2.5 samples. We performed a series of statistical analyses, including Spearman rank-order correlation analysis, principal component analysis (PCA), and multi linear regression (MLR) to determine the most significant species (as source tracers) contributing to the oxidative potential of PM2.5. Our findings revealed that the intrinsic (per PM mass) and extrinsic (per m3 of air volume) oxidative potentials of the collected ambient PM2.5 samples were significantly higher than those measured in many urban areas around the world. The results of the MLR analyses indicated that the major pollution sources contributing to the oxidative potential of ambient PM2.5 were vehicular emissions (characterized by EC) (44%), followed by secondary organic aerosol (SOA) formation (characterized by WSOC) (16%), and biomass burning (characterized by levoglucosan) (9%). The oxidative potential of the collected ambient PM2.5 samples was also higher in summer compared to the winter, mainly due to higher concentrations of EC and WSOC during this season. Results from this study corroborate the impact of traffic and SOA on the oxidative potential of ambient PM2.5 in greater Athens area, and can be helpful in adopting appropriate public health policies regarding detrimental outcomes of exposure to PM2.5.

Dataset Information

Variation in Tree Species Ability to Capture and Retain Airborne Fine Particulate Matter (PM_2.5).

Publications

Variation in Tree Species Ability to Capture and Retain Airborne Fine Particulate Matter (PM<sub>2.5</sub>).

Similar Datasets

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