Abstract：
The Brazilian coast is rich in monazite which is found in beach sand deposits. In this study, the composition of the monazite sands from beaches of State of Espírito Santo, Brazil, was investigated. The concentrations of rare earth elements (REEs), Th, and U were determined by inductively coupled plasma mass spectrometry (ICP-MS). In the studied region, the mean concentration of investigated elements increased in the following order: Tm < Yb < Ho < Lu < Eu < Er < Tb < Dy < U < Y < Th < Gd < Sm < Pr < Nd < La < Ce. The sampling sites were classified into three clusters and discriminated by the concentrations of REEs, Th, and U found. In general, the radiological risk indices were higher than the established limits, and the risk of developing cancer was estimated to be higher than the world average.
摘要：
巴西海岸富含独居石，在海滩砂沉积物中发现。在这项研究中,来自圣埃斯皮里图州海滩的独居石沙子的成分，巴西,被调查。稀土元素(REE)的浓度，Th,用电感耦合等离子体质谱法(ICP-MS)测定U。在研究区域,所研究元素的平均浓度按以下顺序增加:Tm
