Effect of Exogenous Phosphate on the Lability and Phytoavailability of Arsenic in Soils

Wang, Jinjin and Zeng, Xibai and Zhang, Hao and Li, Yongtao and Zhao, Shizhen and Su, Shiming and Bai, Lingyu and Wang, Yanan and Zhang, Tuo (2018) Effect of Exogenous Phosphate on the Lability and Phytoavailability of Arsenic in Soils. Chemosphere, 196. pp. 540-547. ISSN 0045-6535

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The effect of exogenous phosphate (P, 200 mg·kg-1 soil) on the lability and phyto-availability of arsenic (As) was studied using the diffusive gradients in thin films (DGT) technique. Lettuce were grown on the As-amended soils following the stabilization of soil labile As after 90 day’s incubation. Phosphate (P) application generally facilitated plant growth except one grown on P-sufficient soil. Soil labile As concentration increased in all the soils after P application due to a competition effect. Plant As concentration increased in red soils collected from Hunan Province, while decreases were observed in the other soils. Even though, an overall trend of decrease was obtained in As phytoavailability along with the increase of DGT-measured soil labile P/As molar ratio. The functional equation between P/As and As phytoavailability provided a critical value of 1.7, which could be used as a guidance for rational P fertilization, thus avoiding overfertilization.

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This is the author’s version of a work that was accepted for publication in Chemosphere. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemosphere, 196, 2018 DOI: 10.1016/j.chemosphere.2017.12.191
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?? as molar ratioenvironmental chemistrychemistry(all) ??
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20 Feb 2018 17:46
Last Modified:
27 Feb 2024 01:28