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Science China Earth Sciences

, Volume 56, Issue 9, pp 1599–1606 | Cite as

Biogeochemical transport of iodine and its quantitative model

  • HuanXin Weng
  • ChunLai Hong
  • AiLan Yan
  • ZhongQiang Ji
Research Paper

Abstract

Iodine deficiency disorders (IDD) are among the world’s most prevalent public health problems yet preventable by dietary iodine supplements. To better understand the biogeochemical behavior of iodine and to explore safer and more efficient ways of iodine supplementation as alternatives to iodized salt, we studied the behavior of iodine as it is absorbed, accumulated and released by plants. Using Chinese cabbage as a model system and the 125I tracing technique, we established that plants uptake exogenous iodine from soil, most of which are transported to the stem and leaf tissue. The level of absorption of iodine by plants is dependent on the iodine concentration in soil, as well as the soil types that have different iodine-adsorption capacity. The leaching experiment showed that the remainder soil content of iodine after leaching is determined by the iodine-adsorption ability of the soil and the pH of the leaching solution, but not the volume of leaching solution. Iodine in soil and plants can also be released to the air via vaporization in a concentration-dependent manner. This study provides a scientific basis for developing new methods to prevent IDD through iodized vegetable production.

Keywords

Iodine deficiency disorders (IDD) 125biogeochemical transport quantitative model 

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • HuanXin Weng
    • 1
  • ChunLai Hong
    • 2
  • AiLan Yan
    • 3
  • ZhongQiang Ji
    • 4
  1. 1.Institute of Environment and BiogeochemistryZhejiang UniversityHangzhouChina
  2. 2.Zhejiang Academy of Agricultural ScienceHangzhouChina
  3. 3.Zhejiang Water Conservancy and Hydropower CollegeHangzhouChina
  4. 4.Second Institute of OceanographyState Oceanic AdministrationHangzhouChina

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