Abstract
Introduction
Through leaching experiments and simulated rainfall experiments, characteristics of vertical leaching of exogenous rare earth elements (REEs) and phosphorus (P) and their losses with surface runoff during simulated rainfall in different types of soils (terra nera soil, cinnamon soil, red soil, loess soil, and purple soil) were investigated.
Results and analyses
Results of the leaching experiments showed that vertical transports of REEs and P were relatively low, with transport depths less than 6 cm. The vertical leaching rates of REEs and P in the different soils followed the order of purple soil > terra nera soil > red soil > cinnamon soil > loess soil. Results of the simulated rainfall experiments (83 mm h−1) revealed that more than 92% of REEs and P transported with soil particles in runoff.
Conclusion
The loss rates of REEs and P in surface runoff in the different soil types were in the order of loess soil > terra nera soil > cinnamon soil > red soil > purple soil. The total amounts of losses of REEs and P in runoff were significantly correlated.
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Acknowledgments
In this study the laboratory simulated rainfall experiments were conducted at Fangshan Experimental Center of Beijing Normal University. The authors thank Professor Liu Baoyuan and Mr. Gao Xiaofei of Beijing Normal University for their help in the experiments.
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Responsible editor: Philippe Garrigues
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Project supported by the National Natural Science Foundation of China (40871225 and 40571146) and the short-term visiting program for advanced scholars of CAS
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Wang, L., Liang, T., Chong, Z. et al. Effects of soil type on leaching and runoff transport of rare earth elements and phosphorous in laboratory experiments. Environ Sci Pollut Res 18, 38–45 (2011). https://doi.org/10.1007/s11356-010-0357-4
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DOI: https://doi.org/10.1007/s11356-010-0357-4