Global variation in cadmium in rice

  • Zhengyu Shi

Student thesis: Doctoral ThesisDoctor of Philosophy


The purpose of the research outlined here is to study human exposure to cadmium from rice products. The origin of rice products is an important factor in determining the content of cadmium in rice, and cadmium in rice can be greatly reduced by combining procurement and post-harvest processing. The difference in the cadmium content of different types of rice products is also obvious. Choosing rice products with lower cadmium content in food purchase is useful for reducing the body's cadmium intake amount.

Groups which are vulnerable to exposure risk by cadmium also deserve attention, such as infants and children. It should be noted that the interest of food safety agencies and experts all over the world in the study of cadmium exposure risk has been increasing. Compared with arsenic, at the same time, the scope of the investigation on the content of cadmium in rice is narrow, and the amount of data is small, and the samples are not diverse enough. We will investigate the content of cadmium in rice worldwide at first, and consider solutions to reduce human cadmium intake amount and rate after obtaining sufficient data. Besides, there are effective methods to reduce the content of cadmium in rice products during not only the rice growth stage but also product processing stage because of the high accumulation efficiency of cadmium in rice plants.
Date of AwardDec 2022
Original languageEnglish
Awarding Institution
  • Queen's University Belfast
SupervisorChristopher Elliott (Supervisor), Andy Meharg (Supervisor) & Caroline Meharg (Supervisor)


  • Cadmium
  • rice
  • inorganic arsenic
  • ICP-MS
  • global background
  • baby rice product
  • rice bran

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