ABSTRACT

The present study analyzed soil samples from flood-prone Unions in two Coastal Upazilas of Bangladesh using Proton Induced X-Ray Emission (PIXE) techniques with Van de Graaff Accelerator for detecting heavy trace elements and Gamma spectrometry techniques. The findings indicate that while Potassium (averaging 19,62 μg/g for Sutarkhali; 21364.67 μg/g for Amtoli) and Calcium (averaging 36,923.92 μg/g for Sutarkhali; 30404.33 μg/g for Amtoli) levels were high naturally, the levels of Lead (averaging 71.8 μg/g for Sutarkhali; 171.44 μg/g for Amtoli), and Chromium (averaging 6.87 μg/g for Sutarkhali; 340.22 μg/g for Amtoli) were posing a serious risk to the inhabitants. The evaluation contamination factor (CF), pollution load index (PLI), potential ecological risk index (ERI) and health risk assessment indicate severe heavy metal pollution in both regions, with young children being particularly vulnerable to lead poisoning. Nonetheless, the radiation levels were below the safe limit set by the International Atomic Energy Agency (IAEA).

摘要

本研究使用质子诱导 X 射线发射 (PIXE) 技术和范德格拉夫加速器检测重微量元素和伽马能谱技术，分析了孟加拉国两个沿海乌帕齐拉易发生洪水的联合体的土壤样本。研究结果表明，虽然钾（Sutarkhali 平均为 19.62 μg/g；Amtoli 为 21364.67 μg/g）和钙（Sutarkhali 平均为 36,923.92 μg/g；Amtoli 为 30404.33 μg/g）水平自然较高，但铅（苏塔卡利平均为 71.8 微克/克；安托利为 171.44 微克/克）和铬（苏塔卡利平均为 6.87 微克/克；安托利为 340.22 微克/克）对居民构成严重风险。评价污染因子（CF）、污染负荷指数（PLI）、潜在生态风险指数（ERI）和健康风险评估表明，这两个地区的重金属污染严重，幼儿特别容易铅中毒。尽管如此，辐射水平仍低于国际原子能机构（IAEA）设定的安全限值。