Journal of Soils and Sediments

, Volume 18, Issue 4, pp 1540–1547 | Cite as

Application of a rice husk-derived biochar in soil immobilization of iodide (I) and iodate (IO3 )

  • Dong Zhang
  • Li Lu
  • Ting Lü
  • Meiqing Jin
  • Jun Lin
  • Xingyuan Liu
  • Hongting Zhao
Soils, Sec 3 • Remediation and Management of Contaminated or Degraded Lands • Research Article



Radioiodine is an inevitable product of nuclear fission during nuclear fuel reprocessing and nuclear accident and finally is brought back to surface soil by fallout. Iodine is very active and mobile in soil and may adversely affect human health due to bioaccumulation through the food chain. The aim of this study was to evaluate the immobilization efficiency of biochar on the mobility of iodine (I) and iodate (IO3 ) in soil near Qinshan Nuclear Power Plant.

Materials and methods

Biochar was produced from a widely available agricultural waste (rice husk) at a pyrolysis temperature of 350 °C. Biochar was applied to the soil at five application rates (0, 0.33, 0.67, 1, and 1.33%). The affinities of I and IO3 with soil/biochar, the mobility of I and IO3 in biochar-amended soil, and effects of soil pH and ionic strength on immobilization of biochar were assessed by the standard batch sorption and desorption tests.

Results and discussion

Rice husk-derived biochar exhibited strong affinities for I and IO3 as compared to that of soil, with immobilization ability (K biochar/K soil) of 936.6 and 309.9, respectively. Results showed that addition of 1% biochar to soil could significantly reduce desorption of I and IO3 from soil. In addition, immobilization efficiency of biochar was not affected by soil physicochemical properties such as pH and ionic strength.


Results suggested that the easily synthesized biochar could be a promising and environmentally friendly amendment for the efficient immobilization of soil I and IO3 .


Biochar Immobilization Iodide Iodate Soil 


Funding information

This work was supported by the National Natural Science Foundation of China (#21407037, 41271249, and 41301327), Project of the Natural Science Foundation of Zhejiang Province (#LQ14B070006), and Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University.

Supplementary material

11368_2017_1864_MOESM1_ESM.docx (91 kb)
ESM 1 (DOCX 91 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Department of Environmental Science, College of Materials and Environmental EngineeringHangzhou Dianzi UniversityHangzhouChina
  2. 2.School of Environmental Science and EngineeringZhejiang Gongshang UniversityHangzhouChina
  3. 3.College of Electronics and InformationHangzhou Dianzi UniversityHangzhouChina
  4. 4.Guangdong Dazhong Agriculture Science Co., Ltd.DongguanChina

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