Occurrence, spatial distribution, and sources of rare earth elements in soils of large urban agglomerations in Northern China

IF 6.9 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2024-12-31 DOI:10.1016/j.psep.2024.12.122

Shun Li, Siyu Wang, Xiaoxiao Han, Zhunan Xiong, Lingqing Wang, Tao Liang

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引用次数: 0

Abstract

The inadvertent release of rare earth elements (REEs), emerging as pollutants in agriculture and industry, has contributed to urban soil contamination. However, the driving factors and primary sources of their accumulation in urban soils remain inadequately understood. This study systematically investigated the concentration and spatial distribution of REEs in the Beijing-Tianjin-Hebei urban agglomeration (BTHUA) soils and identified pollution sources using gradient boosting decision tree (GBDT) and positive matrix factorization (PMF) models. Results revealed there was a significant risk of point-source pollution from REEs in BTHUA soils, primarily located in areas with heavy traffic and industrial clusters. Analysis using the GBDT model indicated that soil REEs enrichment was influenced by factors such as soil characteristics (humidity index, HI; soil total organic carbon, TOC), and industrial and urbanization activities (enterprise density, ED; distance from road, Distance). The PMF model results demonstrated that natural sources (48.04 %) were the main contributors to REEs in BTHUA soils, while industrial and transportation sources (31.87 %) and agricultural sources (20.09 %) may significantly affect the spatial heterogeneity of REEs in urban soils. These findings provide guidance for the risk management of REEs in BTHUA soils.

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.