Lead was mobilized in acid silty clay loam paddy soil with potassium dihydrogen phosphate (KDP) amendment

Our results indicated that there was a mobilization effect of KDP on Pb by increasing the amount of colloidal Pb in soil solution, especially in acid silty clay loam paddy soil

Qiao Xu; Binhui Ye; Xiaoyu Mou; Jien Ye; Wenyu Liu; Yating Luo; Jiyan Shi

2019

Scholarcy highlights

  • Exogenous KDP could increase the amount of colloidal Pb in soil solution
  • The immobilization effectiveness between Pb and phosphorus in soil varies with soil types
  • Results showed that the concentration of EDTA-Pb in HN soil was slightly elevated after exogenous KDP added
  • The supplement of 300 mg/kg KDP significantly increased the content of soluble Pb in both acid silty clay loam soil and neutral silty loam soil
  • Our results indicated that there was a mobilization effect of KDP on Pb by increasing the amount of colloidal Pb in soil solution, especially in acid silty clay loam paddy soil
  • Such colloid-facilitated transport might promote the uptake of Pb in rice and pose a potential threat to human health

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