Ismail S S, Ramadan A
Atominstitut, Vienna, Austria.
Sci Total Environ. 1995 Dec 1;173-174:69-81. doi: 10.1016/0048-9697(95)04764-6.
Nile- and drinking water samples were collected from several locations between Aswan city and Cairo before and during the flood. Short-time activation analysis was applied to determine the concentrations of Al, Ca, Cl, F, K, Mg, Na and V, while Ba, Cr, Co, Fe, Hf, Rb, Sb, Sc and Zn were determined by irradiating the samples for 20 h at a neutron flux of 1.8 x 10(12) cm-2 s-1. The values of dissolved oxygen, nitrate, sulphate, orthophosphate, organic matter and the pH were determined by applying the standard methods. All data were examined statistically, and classified using cluster analysis technique. The results show that the concentrations of the major and trace elements in drinking water are higher compared with their levels in Nile water. This indicates that the water pumped from the Nile for use as drinking water is mixed with underground water before supplying. It has also been found that the concentrations of nitrate and phosphate in Nile water are significantly higher in Aswan than in those taken from the lower parts of the Nile. Cluster analysis proved to be an ideal technique for classifying these types of samples according to their sampling time and sites.
在洪水来临之前和期间，从阿斯旺市和开罗之间的几个地点采集了尼罗河水和饮用水样本。应用短时间活化分析来测定铝、钙、氯、氟、钾、镁、钠和钒的浓度，而钡、铬、钴、铁、铪、铷、锑、钪和锌则通过在中子通量为1.8×10¹²厘米⁻²秒⁻¹的条件下对样本进行20小时辐照来测定。溶解氧、硝酸盐、硫酸盐、正磷酸盐、有机物和pH值采用标准方法测定。所有数据进行了统计检验，并使用聚类分析技术进行分类。结果表明，饮用水中主要元素和微量元素的浓度高于尼罗河水。这表明从尼罗河抽取用作饮用水的水在供应前与地下水混合。还发现，阿斯旺尼罗河水中硝酸盐和磷酸盐的浓度明显高于尼罗河下游采集的水样。聚类分析被证明是根据采样时间和地点对这类样本进行分类的理想技术。
