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Hexavalent chromium-contaminated soils are encounted at many unregulated discharge andimproper handling of wastes from electroplating, leather tanning, steelmaking, corrosioncontrol, and wood preservation industries. Contamination of hexavalent chromium in the soil isa major concern because of its toxicity and threat to human life and environment.Current technologies for hexavalent chromium-contaminated soil remediation are usuallycostly and/or cannot permanently prohibit the toxic element from entering into the biosphere.Thus, as an alternative technique, immobilization is seen as a cost-effective and promisingremediation technology that may reduce the leachable potential of hexavalent chromium.The purpose of this paper is to develope an immobilization technique for the formation of thegeochemically stabilized hexavalent chromium-contaminated soil from the reactions of labilesoil hexavalent chromium forms with the added soluble phosphate and chromium reducingagent. From the liquid phase experiment, reaction order of chromium reducing agent, solublephosphate, alkali solution shows the best removal efficiency of 95%. In addition, actual soilphase experiment demonstrates up to 97.9% removal efficiency with 1:1 molar ratio ofchromium reducing agent and soluble phosphate.These results provide evidence for the potential use of soluble phosphate and chromiumreducing agent for the hexavalent chromium-contaminated soil remediation.