标题：Distribution characteristics of rare earth elements in urban soil of Kaifeng City, Henan Province, China

作者：Jiang Yuling; Ruan Xinling; He Weichun

来源出版物：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH

DOI：http://dx.doi.org/10.15666/aeer/2201_041054

出版年：2024

文献类型：Article

语种：英文

摘要：Rare earth elements (REES) in urban soils are attracting increasing attention due to their expanded usage in modern technology. However, there is limited information on the spatial patterns and influencing factors of REES in urban soil. This study aims to investigate the characteristics of REES (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er, Tm, Yb and Lu) in urban soil in Kaifeng, Henan province, China. A total of sixty-six representative soil samples were collected from different land use types and the concentrations of thirteen rare earth elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er, Tm, Yb and Lu) were analyzed. Results showed that the concentrations of REES in different land use types followed the order of Ce > La > Nd > Pr > Gd > Sm > Dy > Er > Yb > Eu > Tb > Tm > Lu. Light rare earth elements (LREE) are generally more concentrated than heavy rare earth elements (HREE). Total REE concentrations in the soils were the highest in transportation land, followed by industrial and mining land, residential land, public management and service land, commercial consumption land and control area land. The highest REE concentrations were observed in the middle and southeast of the study area, mainly in densely populated old urban and traditional industrial areas. Different land use types showed LREE enrichment, and Eu exhibited negative anomaly characteristics. The ΣL/ΣH ratio was generally higher than the upper crust at 9.54, indicating clear terrigenous signs. The overall depositional environment of the surface soil in the study area was reduced, and the degree of heterogeneity of the LREE within the surface soil was significantly different from that of HREE.

关键词：Emerging pollutants, Rare earth elements, Differentiation characteristics, Spatial distribution

影响因子：0.7

论文链接：http://dx.doi.org/10.15666/aeer/2201_041054