Assessment of the Ambient Air Quality in lligan City Using Standard and Phytomonitoring Methods
DOI:
https://doi.org/10.26534/kimika.v14i2.75-82Keywords:
phytomonitoring, ambient air pollutants, leaf extract pH, chlorophyll, relative water content, ascorbic acidAbstract
Standard chemical and spectroscopic methods for the determination of sulfur dioxide (SO2). nitrogen dioxide (NO2), suspended parttculate matter (SPM), and lead (Pb) were employed to analyze air samples collected from three study sites in Iligan City, during the period June 1997 to January 1998. At the same time, leaf samples of five trees were collected and analyzed for leaf extract pH, ascorbic acid, chlorophyll, and relative water content. Correlation analysis between air pollutant variables and plant pollution indicators showed that increased levels of pollution resulted in elevated leaf extract pH, depression of chlorophyll, and relative water content. The amount of ascorbic acid was not uniformly affected by the relative dose of air pollutants.
The measured leaf parameters indicated that the responses of the five trees (Artocarpus heterophyllus, Chrysophyllum caimito, Mangifera indica, Swietenia mahogani, and Tsidum guajava) to air pollution are varied. Among them, A. heterophyllus and M. indica showed the highest sensitivity towards pollution loading. The least sensitive is S. mahogani, which suggests that the latter is a tolerant tree and is suitable for the belt zone around pollution sites.
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