Evaluating the influence of alternating flooding and drainage on antimony speciation and translocation in a soil-rice system

被引：0

作者：

Chen, Zhao ^{[1
]}

Xia, Bingqing ^{[1
]}

Yang, Yang ^{[1
]}

Hu, Shiwen ^{[1
]}

Cheng, Kuan ^{[1
]}

Cheng, Pengfei ^{[1
]}

Wang, Shan ^{[1
]}

Chen, Guojun ^{[1
]}

Wang, Qi ^{[1
]}

Dong, Haibo ^{[1
]}

Guo, Chao ^{[1
]}

Chen, Yating ^{[2
]}

Liu, Tongxu ^{[1
]}

机构：

[1] National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Gua

[2] Institute for Disaster Management and Reconstruction, Sichuan University–Hong Kong Polytechnic University, Chengdu,610207, China

来源：

Science of the Total Environment | 2024年 / 957卷

关键词：

The quantitative evaluation of antimony (Sb) accumulation in rice has garnered significant attention due to the potential risks to human health. A pot experiment was conducted to investigate the essential nodes of Sb transfer in soil-rice system. Seven step extract results showed that during the flooding period; organic matter releasing was the primary factor contributing 14.1 % to the increase in Sb availability; while weakly crystallized Fe-Mn oxides and sulfides respectively accounted for 6.9 % and 1.42 %. During the drainage period; a notable increase in active Sb was observed; coinciding with decrease in Fe-Mn oxides and sulfides bond Sb. The migration rate constant of Sb from the root to the above-ground parts increased dramatically during the early flooding stage; being 2000 times higher than that in the mid-to-late stage. The shoot-to-grain migration rate constant remained low; at 1.07 × 10−2 d−1 and 3.52 × 10−3 d−1 during the flooding and drainage periods; respectively; Consequently; Sb accumulation amount in the grain (11.5 μg) was 2.2 times and 6.24 times lower than that in the roots and shoots; respectively. This study quantitatively evaluates the key processes controlling Sb transformation; uptake and translocation throughout different growth stages of the rice plant. © 2024;

D O I：

10.1016/j.scitotenv.2024.177721

中图分类号：

学科分类号：

摘要：

引用

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