| บทคัดย่อ |
The increase in municipal solid waste generation, along with high
concentrations of heavy metals in environments near municipal
landfill, has led to human health hazards. This study investigated
heavy metal contamination in water, sediment, and edible plants near
a municipal landfill, including the bioaccumulation factor (BAF) and
potential health risks. The heavy metal concentrations in the samples
were analyzed using inductively coupled plasma optical emission
spectrometry (ICP-OES). The concentrations of arsenic (As), lead (Pb),
cadmium (Cd), and chromium (Cr) in water samples were not detected
(ND), ND, 0.006 § 0.01 mg/L, and ND, respectively, and in sediment
samples, the concentrations were 1.19 § 0.44, 3.20 § 0.62, 0.46 § 0.21,
and 6.97 § 0.34 mg/kg, respectively. The highest concentrations of As
(5.03 § 0.38), Pb (1.81 § 0.37), and Cd (1.93 § 0.13) were found in
Marsilea crenata, whereas that of Cr (5.68 § 0.79) was detected in
Ipomoea aquatica. The Cr concentration in all plant species exceeded
the standard for vegetables. The BAF values followed the heavy metal
concentrations. All plant species have a low potential for accumulating
Pb and Cr. The edible plants in this study area might cause health
hazards to consumers from As, Pb, and Cd contamination. |
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