ASSESSMENT OF HEAVY METALS CONTAMINATION IN SOILS AND HEALTH RISK IN RICE
Abstract
- Environmental pollution with excess content of heavy metals can lead to the possible contamination of the rice and associated soil. Rice is mainly food and nutrient for people in Myanmar. Eating rice is the most important route for accumulation most chemical elements. The purposes of this study were to assess heavy metal contamination and the potential risk in some soil and rice samples by using EDXRF techniques. Eight rice samples and associated eight soils are collected from Kyaukse, Sinkaing, Amarapura, Patheingyi and Madaya. The mean levels of selected metals concentrations in soil samples and rice samples were found to be less than safe limit but Hg’s concentration values for soil and rice are 2.85 mg/kg and 1.25 mg/kg respectively. The values of Hg are above the safe limit values 1.3 mg/kg for soil and 0.03 mg/kg for rice by USEPA (1997), FAO/WHO (1992). The mean transfer values of selected metals are less than one but Hg’s transfer factor value is the highest value of all the elements. EDIM value 0.007 (mg/kg day) of Pb was found higher than the permissible value 0.001 (mg/kg day) but the rest metals of EDIM values were lower. The potential health risk has been evaluated for the local adults. The risk assessment results of 2017 showed that health risk associated with these elements through consumption of rice were not present. However, regular monitoring of accumulation of heavy metals in rice and soil has been conducted by using more precise and modern techniques.
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Year
- 2020
Author
-
Khin Maung Htwe
Subject
- Physics
Publisher
- Myanmar Academy of Arts and Science (MAAS)