Prediction of Cadmium uptake by brown rice and derivation of soil–plant transfer models to improve soil protection guidelines

P.F.A.M. Römkens, H.Y. Guo, T.S. Liu, C.F. Chiang, G.F. Koopmans

Research output: Contribution to journalArticleAcademicpeer-review

135 Citations (Scopus)

Abstract

Cadmium (Cd) levels in paddy fields across Taiwan have increased due to emission from industry. To ensure the production of rice that meets food quality standards, predictive models or suitable soil tests are needed to evaluate the quality of soils to be used for rice cropping. Levels of Cd in soil and rice grains were measured in 19 paddy fields across the western plains in Taiwan. Cadmium levels in soil range from less than 0.1 mg kg(-1) to 30 mg kg(-1). Measured Cd levels in brown rice were predicted very well (R-2 > 0.8) based on Cd and Zinc in a 0.01 M CaCl2 extract or a soil-plant transfer model using the reactive soil Cd content, pH, and cation exchange capacity. In contrast to current soil quality standards used in Taiwan, such models are effective in identifying soils where Cd in rice will exceed food quality standards. (c) 2009 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)2435-2444
JournalEnvironmental Pollution
Volume157
Issue number8-9
DOIs
Publication statusPublished - 2009

Keywords

  • heavy-metals
  • contaminated soils
  • polluted soils
  • paddy soil
  • cd
  • cultivars
  • zinc
  • accumulation
  • exposure
  • taiwan

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