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Water, Air, & Soil Pollution

, 230:35 | Cite as

Effects of Phosphorus Modified Bio-char on Metals in Uranium-Containing Soil

  • Wen-fa TanEmail author
  • Ya-chao Wang
  • Lei Ding
  • Jun-wen Lv
  • Qi Fang
Article
  • 39 Downloads

Abstract

The level of radioactivity in the soil has been increasing unpredictably due to the human uranium mining exploitation of uranium over the past 100 years. Remediation of metals in actual soil confronts many challenges, remaining poorly understood. This study intends to investigate the concentrations and distributions of U, Cd, Zn, Pb, and Cu in soils surrounded by a uranium mill tailing pond. Furthermore, a phosphorus-modified bio-char was prepared in order to determine its role in immobilizing uranium in soil samples. Results show that the contents of U and Pb are much higher than that of the background values, due to the influence of the uranium mill tailing pond. Phosphorus can enhance the immobilization efficiency of U, Cd, Pb, and Cu in soil samples. The concentration of uranium in the leaching supernatant of phosphorus-modified bio-char group is lower than that of control and unmodified bio-char groups due to the fact that the biosorption occurred in the exterior surface of the biomass, which imply that phosphorus-modified bio-char is a potential immobilization material to reduce the leaching rate of metals. These findings can provide references for remediation technology of metals in natural soil.

Keywords

Uranium mill tailings Uranium Heavy metals Phosphorus modified bio-char Immobilization 

Notes

Acknowledgments

Authors appreciate the valuable comments from K. Mumford and anonymous reviewers.

Funding Information

This work was supported by the National Natural Science Foundation of China (grant number 11605087), China scholarship council (grant number 20170830225), China’s Post-doctoral Science Fund (grant number 2017M610500), and the double first class cinstruct program of USC (grant number 2017SYL05).

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Environmental Engineering, School of Resource & Environment and Safety EngineeringUniversity of South ChinaHengyangChina
  2. 2.Key Laboratory of Pollution Control and Resource Technology of Hunan ProvinceUniversity of South ChinaHengyangChina

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