Eight water bottles from Ebrie lagoon with pollution potency were studied using nuclear chemistry technique and Energy dispersive X-ray fluorescence. This pollution is characterized by pH and conductivity parameters, ...Eight water bottles from Ebrie lagoon with pollution potency were studied using nuclear chemistry technique and Energy dispersive X-ray fluorescence. This pollution is characterized by pH and conductivity parameters, concentrations average in mg/L of metals such Fe (0.731), Mn (0.345), Cr (0.070), Cu (0.014) and concentrations of nutrients known to be pollutants and toxic for living or-ganisms. These heavy metals are dangerous to the lives, the local inhabitants and also a threat to aquatic life since this water is essential for the economical town, Abidjan. According to the Manganese concentration average (0.345 mg) values that higher than WHO (0.05 mg) value, the main likely source of pollu-tants is anthropogenic, industrial and agricultural. This study also shows the use of materials and lubricants near the lagoon that pollute this water.展开更多
This research was conducted in the Qassim region, Kingdom of Saudi Arabia. The goal of this research is to determine the percentage of silicon in the Rub al-Khali desert. Samples were collected from four cities locate...This research was conducted in the Qassim region, Kingdom of Saudi Arabia. The goal of this research is to determine the percentage of silicon in the Rub al-Khali desert. Samples were collected from four cities located in the Al-Qassim Region of Saudi Arabia (Uyun Al-Jawa, Al-Fuwailiq, Al-Sulaibiya, and Al-Qawara), from three distinct depths (the earth’s surface, 50 cm, and 100 cm). The percentages of silicon in these places vary between the highest value for silicon dioxide, which is 74.47 m/m%, and 34.8 m/m% for silicon in Al-Qawara city at a depth of 100 cm. We used an x-ray fluorescence (XRF) instrument to evaluate the samples. There are high percentage of both silica and silicon in the Nafud desert. Studies have shown that these ratios can help investors benefit from an element of Silicon and silicon dioxide, so the sands of the Nafud desert is sufficient for extracting Silicon and silica in huge quantities. This may transform the Kingdom into a leading country in the global computer technology industry that depends on silicon extracted from the desert sands, the most important of which are microcomputer data processing devices.展开更多
现场X射线荧光分析(EDXRF)中,使用滤光片可以有效的降低或消除由原级谱在样品中散射背景,特征谱对待测元素的干扰。论文采用MCNP5程序模拟了加不同厚度Al、Cu、Ag、Kapton滤光片前后的原级谱分布。依据模拟结果,原级X射线谱的谱分布与...现场X射线荧光分析(EDXRF)中,使用滤光片可以有效的降低或消除由原级谱在样品中散射背景,特征谱对待测元素的干扰。论文采用MCNP5程序模拟了加不同厚度Al、Cu、Ag、Kapton滤光片前后的原级谱分布。依据模拟结果,原级X射线谱的谱分布与滤光片的材质和厚度有关。能量低于5ke V的射线对分析是无用的。在能量5~10 ke V的能量谱段,选择Al滤光片较为合适;在能量10~25ke V谱段范围,Ag滤光片相对于另外三种滤光片较为合适。从而为现场X荧光分析仪的研制提供技术支撑。展开更多
文摘Eight water bottles from Ebrie lagoon with pollution potency were studied using nuclear chemistry technique and Energy dispersive X-ray fluorescence. This pollution is characterized by pH and conductivity parameters, concentrations average in mg/L of metals such Fe (0.731), Mn (0.345), Cr (0.070), Cu (0.014) and concentrations of nutrients known to be pollutants and toxic for living or-ganisms. These heavy metals are dangerous to the lives, the local inhabitants and also a threat to aquatic life since this water is essential for the economical town, Abidjan. According to the Manganese concentration average (0.345 mg) values that higher than WHO (0.05 mg) value, the main likely source of pollu-tants is anthropogenic, industrial and agricultural. This study also shows the use of materials and lubricants near the lagoon that pollute this water.
文摘This research was conducted in the Qassim region, Kingdom of Saudi Arabia. The goal of this research is to determine the percentage of silicon in the Rub al-Khali desert. Samples were collected from four cities located in the Al-Qassim Region of Saudi Arabia (Uyun Al-Jawa, Al-Fuwailiq, Al-Sulaibiya, and Al-Qawara), from three distinct depths (the earth’s surface, 50 cm, and 100 cm). The percentages of silicon in these places vary between the highest value for silicon dioxide, which is 74.47 m/m%, and 34.8 m/m% for silicon in Al-Qawara city at a depth of 100 cm. We used an x-ray fluorescence (XRF) instrument to evaluate the samples. There are high percentage of both silica and silicon in the Nafud desert. Studies have shown that these ratios can help investors benefit from an element of Silicon and silicon dioxide, so the sands of the Nafud desert is sufficient for extracting Silicon and silica in huge quantities. This may transform the Kingdom into a leading country in the global computer technology industry that depends on silicon extracted from the desert sands, the most important of which are microcomputer data processing devices.
文摘现场X射线荧光分析(EDXRF)中,使用滤光片可以有效的降低或消除由原级谱在样品中散射背景,特征谱对待测元素的干扰。论文采用MCNP5程序模拟了加不同厚度Al、Cu、Ag、Kapton滤光片前后的原级谱分布。依据模拟结果,原级X射线谱的谱分布与滤光片的材质和厚度有关。能量低于5ke V的射线对分析是无用的。在能量5~10 ke V的能量谱段,选择Al滤光片较为合适;在能量10~25ke V谱段范围,Ag滤光片相对于另外三种滤光片较为合适。从而为现场X荧光分析仪的研制提供技术支撑。
