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Trace Metals in Total Atmospheric Depositions (TAD) of a Nigerian Island

机译:尼日利亚岛大气总沉积物中的痕量金属

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The paucity of data on air quality studies in Nigeria prompted us to commence the monitoring of total atmospheric deposition (TAD) in Lagos Island, Nigeria. TAD samples were collected every 30 days for a period of two years using a local assembled gauge fashioned after the Australian model gauge. Elemental characterization was carried out by Particle Induced X-ray Emission (PIXE) technique via an in-vacuum ion beam set-up. The TAD rates ranged from 1 to 62 g-1m3 month-1. Twenty-eight elements (Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Ga, As, Zn, Se, Br, Rb, Y, Nb, Mo, Sr, Zr and Pb) were detected in both fractions and their concentrations were assessed. Enrichment factors (EF) and pollution indices (PLI) were calculated and results revealed that most elements were anthropogenic with concentrations exceeding the World Health Organization guideline standards.
机译:尼日利亚空气质量研究的数据很少,促使我们开始监测尼日利亚拉各斯岛的总大气沉积物(TAD)。 TAD样品每30天收集一次,为期两年,使用的是澳大利亚模型量规之后制作的本地组装量规。元素表征通过粒子内X射线发射(PIXE)技术通过真空中离子束装置进行。第1个月的TAD速率介于1到62 g-1m3之间。 28种元素(Na,Mg,Al,Si,P,S,Cl,K,Ca,Ti,V,Cr,Mn,Fe,Ni,Cu,Ga,As,Zn,Se,Br,Rb,Y ,Nb,Mo,Sr,Zr和Pb均被检出并评估其浓度。计算了富集因子(EF)和污染指数(PLI),结果表明大多数元素都是人为的,其浓度超过了世界卫生组织的指导标准。

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