ASSESSMENT OF HEAVY METALS POLLUTION AND DEGREE OF CONTAMINATION IN THE HEINDA MINING AREA, DAWEI TOWNSHIP
Abstract
- In this research, five soil samples from the mining sites and one from control site from mining works were collected from Heinda mining areas in Dawei Township, Tanintharyi Region in March, 2019. Physicochemical properties of collected soil samples (S1, S2, S3, S4, and S5 from the industrial mining sites and undisturbed site (S0) were determined. All soil samples were nearly neutral in the pH range of 6.32-7.03. Moisture of soil samples were in the range of 0.11- 0.40. Soil types of soil samples were found to be loamy sand for S0, and sand for S1, S2, S3, S4 and S5. In addition, the concentrations of some heavy metals (Pb, Cd, Mn, Zn, Fe, Cu) contents in soil samples were analysed by Atomic Absorption Spectrophotometric method. According to AAS method, Pb contents of soil samples (S0, S1, S2, S3, S4, S5) were not detected. However, Cd contents were observed as 0.05, 0.04, 0.04, 0.07, 0.04, and 0.03 ppm, respectively. Moreover, 6.04, 54.26, 31.42, 19.76, 40.10, and 36.86 ppm of Mn, 0.35, 0.65, 0.69, 0.67, 0.77, and 0.62 ppm of Zn, 39.02,48.02, 49.76, 45.41, 48.06 and 44.46 ppm of Fe and then, 0.50 ppm of Cu was observed for S0, but not detected for S1, S2, S3, S4 and S5. The contamination factor (Cf), degree of contamination (Cd) and pollution load index (PLI) were used to assess the degree of heavy metal pollution in soil. According to PLI, the sites were classified as moderately contaminated with Zn, considerably contaminated with Fe, and highly contaminated with Mn compared to control site.
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Year
- 2021
Author
-
Myo Than
Subject
- Chemistry
Publisher
- Myanmar Academy of Arts and Science (MAAS)