Next Article in Journal
Effect of Underground Coal Mining on the Regional Soil Organic Carbon Pool in Farmland in a Mining Subsidence Area
Previous Article in Journal
Framework of Aspects for the Evaluation of Multimodal Journey Planners
Version is current.
Open AccessArticle

Geochemical Characteristics of Rare Earth Elements in Soils from Puding Karst Critical Zone Observatory, Southwest China

1
School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
2
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(18), 4963; https://doi.org/10.3390/su11184963
Received: 27 July 2019 / Revised: 5 September 2019 / Accepted: 5 September 2019 / Published: 11 September 2019
Soil samples from eight soil profiles under different land-use types were collected at the Puding Karst Critical Zone Observatory, Southwest China, to investigate the distribution, fractionation, and controlling factors of rare earth elements (REEs). The total REEs contents in topsoil ranged from 149.97 to 247.74 mg kg−1, the contents in most topsoil were higher than local soil background value (202.60 mg kg−1), and the highest content was observed in topsoil under cropland. The REEs contents in surface soils from lower slopes sites were higher than that of middle and upper slope sites, and the highest contents were observed in cropland. The PAAS-normalized REEs pattern in soils showed MREEs significantly enriched relative to LREEs and HREEs, and HREEs were enriched relative to LREEs. The results showed that clay content, pH, soil organic carbon, total phosphorus, and Fe content were the main factors influencing the distribution of REEs in karst soils, and soil organic carbon (SOC), Fe content showed better linear relationship with REEs. View Full-Text
Keywords: rare earth elements; land use; soil organic carbon; karst critical zone observatory; southwest china rare earth elements; land use; soil organic carbon; karst critical zone observatory; southwest china
Show Figures

Figure 1

MDPI and ACS Style

Zhang, Q.; Han, G.; Liu, M.; Wang, L. Geochemical Characteristics of Rare Earth Elements in Soils from Puding Karst Critical Zone Observatory, Southwest China. Sustainability 2019, 11, 4963.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop