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In Situ Toxicity Reduction and Food Safety Assessment of Pak Choi (Brassica campestris L.) in Cadmium-Contaminated Soil by Jointly Using Alkaline Passivators and Organic Fertilizer

文献类型： 外文期刊

作者： Jiao, Wei 1 ; Li, Zhi 2 ; Li, Ruiping 3 ; Guo, Jiafeng 4 ; Hou, Xiaoshu 5 ; Zhang, Xi 6 ; Wang, Fangli 2 ;

作者机构： 1.Linyi Univ, Coll Resources & Environm, Shandong Prov Key Lab Water & Soil Conservat & Env, Linyi 276000, Peoples R China

2.Qingdao Agr Univ, Sch Resources & Environm, Qingdao 266109, Peoples R China

3.Qufu Normal Univ, Sch Geog & Tourism, Rizhao Campus, Rizhao 276800, Peoples R China

4.Qingdao Hairun Water Grp Co Ltd, Qingdao 266000, Peoples R China

5.Chinese Acad Environm Planning, Beijing 100012, Peoples R China

6.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

关键词： cadmium (Cd) toxicity; organic fertilizer; alkaline passivator; soil remediation; food safety

期刊名称：TOXICS （ 影响因子：4.6； 五年影响因子：4.8 ）

ISSN：

年卷期： 2023 年 11 卷 10 期

页码：

收录情况： SCI

摘要： An economical and effective method is still lacking for cadmium (Cd) toxicity reduction and food product safety improvement in soil-vegetable systems. Therefore, this study aimed to reduce the Cd toxicity to pak choi (Brassica campestris L.) by jointly using passivators and organic fertilizer, highlighting food products' safety based on pot experiments. The results showed that compared with the control, organic fertilizer decreased the Cd content in edible parts and the soil's available Cd by 48.4% and 20.9% on average, respectively, due to the 0.15-unit increases in soil pH. Once jointly applied with passivators, the decrements increased by 52.3-72.6% and 32.5-52.6% for the Cd content in edible parts and for the soil's available Cd, respectively, while the pH increment increased by 0.15-0.46 units. Compared with the control, the transport factor of Cd was reduced by 61.9% and 50.9-55.0% when applying organic fertilizer alone and together with the passivators, respectively. The combination treatment of biochar and organic fertilizer performed the best in decreasing the Cd content in the edible parts and the soil's available Cd. The combination treatment of fish bone meal and organic fertilizer induced the greatest increases in soil pH. The grey relational analysis results showed that the combination treatment of biochar and organic fertilizer performed the best in reducing the potential Cd pollution risk, thereby highlighting the vegetable food safety. This study provides a potential economical and effective technology for toxicity reduction and food safety in Cd-polluted soil.

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