Avicennia marina (Forssk.) Vierh. as phytoaccumulator of sediment heavy metals in the Las Piñas – Parañaque Critical Habitat and Ecotourism Area (Philippines).
2015; Volume: 6; Issue: 2 Linguagem: Inglês
ISSN
0975-8585
AutoresArnold V. Hallare, Antônio Lázaro Ferreira Santos, M. N. A. R. Uy, Allan Patrick G. Macabeo,
Tópico(s)Coastal wetland ecosystem dynamics
ResumoThe aim of the study is to determine the efficiency of Avicennia marina in phytoaccumulating the heavy metals in the Las Pinas-Paranaque Critical Habitat and Ecotourism Area (LPPCHEA). Inductively Coupled Plasma-Optical Emission Spectrometry (ICP/OES) was used to determine the chromium (Cr), copper (Cu), and lead (Pb) concentrations of the ten composite samples of sediments and plant organs, namely barks of stems and pencil roots, in the area. The bioconcentration factors (BCF) of each plant organ for each heavy metal were calculated to quantify the efficiency of phytoaccumulation. Results showed that Cu (37.41 ppm) had the highest concentration in the plant, followed by Pb (15.37 ppm) then Cr (4.94 ppm).However, taking into account the BCF values of the heavy metals, it was observed that Pb (1.09) was the highest phytoaccumulated heavy metal, followed by Cu (0.44) then Cr (0.28). Moreover, it was also observed that the average concentrations of Pb (13.55 ppm), Cu (27.27 ppm), and Cr (4.22 ppm) in the sediments were below the standard sediment concentrations. The study suggests that A. marina is efficient in phytoaccumulating Pb, having a BCF value greater than one, in LPPCHEA. Furthermore, the root and bark tissues of the mangrove
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