Yahya, Mohd Adib
Analysis of Heavy Metals in Water Samples from
Household Wells in Kubang Kerian.
Other.
Universiti Sains Malaysia.
(Submitted)
Abstract
When water becomes contaminated to the extent that is does not meet
Environmental Protection Agency (EPA) drinking water quality standards, it is
considered unsafe to be consumed. But if it otherwise, it means the water is safe
for consumption. In this study, water samples from different well waters at seven
areas were collected. In every well, the samples were taken three times; in the
morning, afternoon and evening. Atomic Absorption Spectrometry (AAS)
instrument was used to determine the concentration of Zn, Cd, Cu, and Ni in the
samples. The pH value for all samples was also measured. Another test was Total
Dissolved Solid (TDS) test. The pH values of the all samples were in the range of
6.0 to 8.5. The TDS concentrations for all samples collected at different time were
between 0.021 ppm (area 4) to 0.076 ppm (area 7) in the morning, 0.026 ppm
(area 4) to 0.085 (area 1) in the afternoon, and 0.013 ppm (area 4) to 0.065 ppm
(area?). The concentrations of Zn for all samples collected at different time were
between 0.026 ppm (area 2 and area 3) to 0.064 ppm (area 7) in the morning,
0.020 ppm (area3) to 0.063 ppm (area 7) in the afternoon, 0.025 ppm (area 2) to
0.060 ppm (area 7). The concentrations of Cd for all samples collected at different
time were between 0.020 ppm (area 1) to 0.037 ppm (area 7) in the morning, 0.021
ppm (area 1) to 0.041 ppm (area 7) and 0.023 ppm (area 1) to 0.037 ppm (area 7).
The concentrations of Cu for all samples collected at different time were between
0.001 ppm (area 1) to 0.017 ppm (area 7) in the morning, 0.003 ppm (area 1 and
area 3) to 0.014 ppm (area 7) and 0.003 ppm (area 1) to 0.016 ppm (area 7). The concentrations of Ni for all samples collected at different time were between
0.038 ppm (area 1) to 0.057 ppm (area 7) in the morning, 0.043 ppm (area 1) to
0.056 ppm (area 7) and 0.044 ppm (area 1) to 0.054 ppm (area 7). All the results
found were compared with the standard recommended by EPA. All samples have
lower concentrations as compared to EPA recommendation.
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