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Effect of Phosphate and Iron Oxide on Mobility of Lead and Arsenic in Shooting Range Soils

Author Affiliations

  • 1University of Georgia Cooperative Extension, 2300 College Station Road, Athens, GA 30602, USA
  • 2Soil and Water Science Department, University of Florida, Gainesville, FL 32611, USA

Int. Res. J. Environment Sci., Volume 5, Issue (7), Pages 7-23, July,22 (2016)


Soil pollution in shooting range soils is a public health concern due to the presence of toxic elements such as lead and arsenic. This study evaluated the effectiveness of phosphate and Fe-oxide amendments to reduce the mobility of Pb and As in six shooting range soils in Florida using leaching tests, mineralogical analysis, kinetic study and geochemical modeling with Visual MINTEQ. Phosphate (phosphate rock and phosphoric acid) was applied either singly or in combination with iron-oxide at different Fe/As molar ratios. TCLP-Pb concentrations were reduced from 19-2422 to 1.75-5.16 mg/L in P treated soils, indicating that TCLP-Pb was reduced below or close to the regulatory limit of 5 mg/L. Even though the SPLP-Pb also reduced in P-treated soils, it did not fall below regulatory limit of 15 &


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