Effects of hydroxylapatite-series materials on cadmium adsorption in rice
Study on the effects of nano-hydroxyapatite(nHAP)series materials on the uptake and transport of cadmium(Cd)in rice,we validated the effects of nHAP,nHAP-Se,and nHAP-Fe treatments on the adsorption and accumulation of Cd in rice using pot experiments.When nHAP series materials were applied to rice soil,the Cd content of brown rice,husk,and straw was significantly lower than that of the blank control,and the Cd content of brown rice also decreased under the effects of nHAP-Se and nHAP-Fe by 68.12%and 64.18%,respectively,which was lower than the limit value of 0.2 mg·kg-1,according to the national food safety standard.Overall,this study showed that nHAP series materials resulted in good adsorption and retention of soil Cd by reducing its water solubility and ion exchange capacity,thus reducing the transport activity of soil Cd between soil and plants.
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