H. Bounouira , K. Embarch , H. Amsil , M. Bounakhla , S. Foudeil , S. Ait lyazidi , F. Benyaich , M. Haddad , F. Said
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引用次数: 14
Abstract
The k0-method of neutron activation analysis (k0-NAA) was used in order to determine the concentration of major and trace elements in sediment samples collected from different sites in the Gharb plain along the Sebou River (Morocco). Samples have been analyzed using neutrons of the Moroccan Triga Mark II research reactor. Two types of irradiation (short and long) have been carried out using the Pneumatic Tube System (PTS) and the Rotary Specimen Rack (RSR). Acquisition and Fitting of spectra have been carried out by Maestro software and k0-IAEA program respectively. Pollution indicators (enrichment factor (EF), geoaccumulation index (Igeo), contamination factor (CF) and pollution load index (PLI)) were calculated to assess the pollution status of the sediments. Results of pollution indices showed no contamination all around the catchment area except for the stations (MS1 and MS2) located downstream the Sebou river. Principal component analysis (PCA) was carried out with the Pearson coefficient in order to determine possible relationships between major and trace elements. The comparison with other subsequent studies on Sebou river gives an idea about the temporal evolution of heavy metal contamination at national scale.
用k0-NAA法在摩洛哥Triga Mark II研究堆对摩洛哥Sebou河沿岸Gharb平原重金属评价的研究
采用中子活化分析(k0-NAA)方法测定了摩洛哥塞布河沿岸Gharb平原不同地点沉积物样品中主微量元素的浓度。使用摩洛哥Triga Mark II研究堆的中子对样品进行了分析。使用气动管系统(PTS)和旋转标本架(RSR)进行了两种类型的辐照(短辐照和长辐照)。光谱的采集和拟合分别用Maestro软件和k0-IAEA程序进行。通过计算污染指标(富集系数(EF)、地质积累指数(Igeo)、污染系数(CF)和污染负荷指数(PLI))来评价沉积物的污染状况。污染指数分析结果表明,除Sebou河下游的MS1和MS2站外,集水区周围均无污染。利用Pearson系数进行主成分分析(PCA),以确定主、微量元素之间可能存在的关系。通过与其他后续研究的比较,可以了解全国范围内重金属污染的时间演变。