Cadmium (Cd) is a toxic metal with high mobility from soil and known translocation into plants (Song et al.,2015).Because the main source of human exposure to Cd is from food consumption,there has been increased research examining Cd uptake in agricultural plants (Li et al.,2014;Rizwan et al.,2016;Song et al.,2015).Rice (Oryza sativa L.) has been identified as a major crop that contains relatively high concentrations of Cd.Excess exposure to Cd could result in adverse health conditions,including anemia,lung damage,cancer,and renal dysfunction (Song et al.,2015).An example of Cd toxicity in humans is the itai-itai disease,caused by daily consumption of Cd-contaminated rice grown near mining sites.Patients with itai-itai disease have symptoms of renal dysfunction,severe pain and bone fractures (Uraguchi and Fujiwara,2013).With the increase in urbanization,automobile traffic and industrialization,higher concentrations of Cd,lead,zinc and copper have been reported in urban soils (Wang et al.,2018).Several materials,including zeolites,hydroxyapatite and humic acids,have been demonstrated to be promising tools to immobilize or remove Cd from soils (Bai et al.,2018;Barragán et al.,2017;Li et al.,2017;Xin et al.,2017).