NAA for Trace Elemental Analysis of Sludge Samples from Different Oil Sites in the Egyptian Eastern Desert
NAA for Trace Elemental Analysis of Sludge Samples from Different Oil Sites in the Egyptian Eastern Desert
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NAA 对埃及东部沙漠不同石油地点的污泥样品进行痕量元素分析
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
E. Zahran
中科院分区：
文献类型：
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作者：
M. Bakr;A. Elattar;S. Salama;M. Ahmed;E. Zahran
泥沙等石油废物中放射性同位素浓度的测定不仅是炼油厂、工业加工、废物处理和运输的重要问题，而且对人类健康和环境也具有重要意义。由于这些放射性同位素具有辐射风险，因此应对其进行评估和控制。此外，它们可能含有重和有毒元素，造成危险污染。本文将重点评估位于埃及东部沙漠的不同石油公司的污泥样品中金属、重金属和有毒元素的浓度。采用中子活化分析(NAA)技术对5个渣油样品进行了元素分析。样品用埃及第二研究堆(ETRR-2)(兔辐照系统)内的照射箱照射4h，14d后用HPGe探测器计数。测定了不同浓度的18种同位素(Ca、Sc、Cr、Fe、Co、Zn、Br、Rb、Sr、Ag、Sb、Cs、Ba、Eu、Yb、Lu、Hf、Ta)。与样品中的其他同位素相比，钙、铁、锶、钡的同位素含量较高。样品中检出高浓度的钡有毒元素和低浓度的其他痕量元素。所有样品中均检出超标的铁元素。研究结果表明，需要对这些地点的石油废物进行更多的监测，以最大限度地减少对环境的污染，最大限度地减少工人的辐射风险。
Determination of the radioactive isotopes concentrations in the petroleum waste of sludge and sand is an essential issue not only to refineries, industrial processing, waste disposal and transports but also, to human health and the environment. As these radioactive isotopes are radiation risky, therefore they should be assessed and controlled. Moreover, they might contain heavy and toxic elements which cause hazardous pollution. This paper will focus on the evaluation of the concentrations of metals, heavy and toxic elements in sludge samples from different petroleum companies’ sites located in the eastern Egyptian desert. Five sludge oil samples were elementally analyzed by Neutron Activation Analysis (NAA) technique. The samples were irradiate using the irradiation box inside the Egyptian second research reactor (ETRR-2) (rabbit irradiation system) for 4 hours and then counted after 14 days using HPGe detector. 18 isotopes named (Ca, Sc, Cr, Fe, Co, Zn, Br, Rb, Sr, Ag, Sb, Cs, Ba, Eu, Yb, Lu, Hf, and Ta) were detected with different concentrations in the samples under investigation. The isotopes of Ca, Fe, Sr, and Ba had high concentrations compared with other isotopes in the samples. The toxic element of barium with high concentration and other trace elements with low concentrations were detected in the samples. High concentration of Fe trace elements above the standard level was detected in all samples. The outcomes of the study imply that more monitoring is needed for the petroleum waste in these locations to minimize the environmental pollution and to minimize the radiation risk for the workers.