Journal of Ecology and Rural Environment ›› 2024, Vol. 40 ›› Issue (4): 449-460.doi: 10.19741/j.issn.1673-4831.2023.0280

Previous Articles     Next Articles

Effect of Phytate-mediated Arsenic and Phosphorus Transformation and Bioavailability in Soils and Sediments: A Review

WU Bo-xian1,2, AI Wen-yan1, WEN Si-ying1, YANG Xiao-li1,2, LIU Xue1,2   

  1. 1. Institute of Ecology and Environment, Southwest Forestry University, Kunming 650224, China;
    2. Institute of Environment Remediation and Health, Southwest Forestry University, Kunming 650224, China
  • Received:2023-04-10 Online:2024-04-25 Published:2024-04-25

Abstract: Phosphorus (P) and Arsenic (As) are chemical analogues of the same main group, with similar chemical properties and behaviors. Arsenic has attracted widespread attention due to its diverse forms of occurrence, strong bioaccumulation and high toxicity. It mainly exists in the form of arsenate (As5+) in soil. Phosphorus is an essential nutrient for plants and an important factor causing soil non-point source pollution and water eutrophication. Phosphorus in soil mainly exists in the form of organic phosphorus, accounting for 40%-95% of the total, with phytic acid being an important component, accounting for 20%-50% of total phosphorus and 50%-80% of organic phosphorus. Phytic acid molecule contains 6 phosphate groups and 12 dissociative protons, which can strongly affect the occurrence forms and bioavailability of arsenic and phosphorus in soil through chelation, displacement, acidification and other effects. Clarifying the impact, process, and mechanism of phytic acid on the transformation and release of arsenic and phosphorus forms in soil is of great significance for effectively controlling arsenic/phosphorus pollution in soil and water bodies. Therefore, this paper reviews the contents, sources and forms of As, P and phytate in soils and sediments, with more emphasis on the effects and mechanisms of phytate on As and P transformation and bioavailability changes. In addition, further researches are proposed. The information helps to provide reference for reducing arsenic and phosphorus pollution in soil and sediment.

Key words: soil, phytic acid, arsenic, phosphorus, speciation transformation, bioavailability

CLC Number: