Bioavailable arsenic and amorphous iron oxides provide reliable predictions for arsenic transfer in soil-wheat system

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Bioavailable arsenic and amorphous iron oxides provide reliable predictions for arsenic transfer in soil-wheat system
	Chen, Peng; Zhang, Hong-Mei; Yao, Bao-Min; Chen, Song-Can; Sun, Guo-Xin; Zhu, Yong-Guan
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2020-02-05
卷号	383 页码:1-10
关键词	Wheat Bioavailable arsenic (As) Transfer factor Prediction models Amorphous iron oxides
ISSN号	0304-3894
英文摘要	The application of current soil quality standards based on total arsenic (As) fails to assess the ecological risks of soil arsenic or to ensure the safety of crops and foods. In this study, bioavailable arsenic instead of total arsenic was applied to improve predictive models for arsenic transfer from soil to wheat (Trianon awgidutn L.). The stepwise multiple-linear regression analysis showed that bioavailable arsenic and amorphous iron oxides (Fe-OX) were the two most important factors contributing to arsenic accumulation in wheat grain, with the explained percentage of variation being up to 82%. Compared with the bioavailable arsenic extracted by NH4H2PO4, bioavailable arsenic extracted by HNO3 from soils generated better predictions of the amount of arsenic in grain. The best reliable model was log[As-grain] = 0.917 log[HNO3-As] - 0.452 log[Fe-OX] - 1.507 (R-2 = 0.82, P < 0.001). Consistently, bioavailable arsenic and Fe-OX were also the key factors to predict arsenic accumulation in wheat straw, leaves and spikes. Our prediction models was successfully verified for three independent soils. Our results highlight the role of soil bioavailable heavy metals in predicting their transfer in soil-plant systems and can be used to improve existing Chinese soil quality standards.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44229]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Chen, Peng,Zhang, Hong-Mei,Yao, Bao-Min,et al. Bioavailable arsenic and amorphous iron oxides provide reliable predictions for arsenic transfer in soil-wheat system[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,383:1-10.
APA	Chen, Peng,Zhang, Hong-Mei,Yao, Bao-Min,Chen, Song-Can,Sun, Guo-Xin,&Zhu, Yong-Guan.(2020).Bioavailable arsenic and amorphous iron oxides provide reliable predictions for arsenic transfer in soil-wheat system.JOURNAL OF HAZARDOUS MATERIALS,383,1-10.
MLA	Chen, Peng,et al."Bioavailable arsenic and amorphous iron oxides provide reliable predictions for arsenic transfer in soil-wheat system".JOURNAL OF HAZARDOUS MATERIALS 383(2020):1-10.