Accumulation characteristics of Cd, As, and Pb in cherry radish (Raphanus sativus L.var.radculus pers) grown in composite polluted soil and its safe production thresholds

QI Hao; QIAN Xiang-yu; WAN Ya-nan; LI Hua-fen; WANG Qi; ZHUANG Zhong

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China Environmental Science ›› 2025, Vol. 45 ›› Issue (5) : 2598-2607.

Accumulation characteristics of Cd, As, and Pb in cherry radish (Raphanus sativus L.var.radculus pers) grown in composite polluted soil and its safe production thresholds

QI Hao, QIAN Xiang-yu, WAN Ya-nan, LI Hua-fen, WANG Qi, ZHUANG Zhong

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Abstract

In this study, a pot experiment was conducted to simulate soil contaminated with varying levels of cadmium (Cd), arsenic (As), and lead (Pb) to investigate the changes in biomass, the absorption and accumulation of mineral nutrients, as well as the accumulation characteristics of heavy metals under different contamination conditions. Furthermore, soil threshold for Cd, As, and Pb in acidic soil were derived to ensure the safe production of cherry radish. The results indicated that cherry radish exhibited significant toxic effects when heavy metals content added in soil reached the risk control threshold. The contents of iron (Fe), copper (Cu), and zinc (Zn) in root of cherry radish increased initially and then decreased as the level of heavy metals contamination increased, while manganese (Mn) content continuously increased. The root of cherry radish had the highest enrichment and translocation ability for Cd, with average bioconcentration factors (BCF) being 18.6 and 115 times higher than those for As and Pb, respectively. The average translocation factors (TF) for Cd were 4.02 and 2.41 times higher than those for Pb and As, respectively. Based on the National Food Safety Standard (GB2762—2022), and considering the safety of both the roots and shoots of cherry radishes, the derived soil threshold values for safe cherry radish production in acidic soil were 0.30mg/kg for Cd, 171.1mg/kg for As, and 27.5mg/kg for Pb.

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composite pollution / heavy metals / mineral elements / safety production threshold / vegetable

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QI Hao, QIAN Xiang-yu, WAN Ya-nan, LI Hua-fen, WANG Qi, ZHUANG Zhong. Accumulation characteristics of Cd, As, and Pb in cherry radish (Raphanus sativus L.var.radculus pers) grown in composite polluted soil and its safe production thresholds[J]. China Environmental Science. 2025, 45(5): 2598-2607

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