Arsenic accumulation and speciation in rice grown in arsanilic acid-elevated paddy soil

文献类型： 外文期刊

第一作者： Geng, Anjing

作者： Geng, Anjing;Wang, Xu;Wang, Fuhua;Geng, Anjing;Wu, Lishu;Chen, Yan;Zhang, Zhan;Yang, Hui;Zhao, Xiaoli

作者机构：

关键词： Rice;Arsanilic acid;Arsenic speciatMn;Accumulation;Metabolism;HPLC-ICP-MS

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

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年卷期：

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收录情况： SCI

摘要： P-arsanilic acid (MA) is a emerging but less concerned contaminant used in animal feeding operations, for it can be degraded to more toxic metabolites after being excreted by animals. Rice is the staple food in many parts of the world, and also more efficient in accumulating arsenic (As) compared to other cereals. However, the uptake and transformation of MA by rice is unclear. This study aimed to evaluate the potential risk of using MA as a feed additive and using the AsA contaminated animal manure as a fertilizer. Five rice cultivars were grown in soil containing 100 mg AsA/kg soil, after harvest, As species and their concentrations in different tissues were determined. Total As concentration of the hybrid rice cultivar was more than conventional rice cultivars for whole rice plant. For rice organs, the highest As concentration was found in roots. MA could be absorbed by rice, partly degraded and converted to arsenite, monomethylarsonic acid, dimethylarsinic acid, arsenate. The number of As species and their concentrations in each cultivar were related to their genotypes. The soil containing 100 mg AsA/kg or more is unsuitable for growing rice. The use of AsA and the disposal of animal manure requires detailed attention.

分类号： X`R12`R99

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