Enhanced remediation of Cr(VI)-contaminated soil by incorporating a calcined-hydrotalcite-based permeable reactive barrier with electrokinetics

► Combing electrokinetic with permeable reactive barrier to remove Cr(VI) from simulated soil. ► Cr(VI) removal efficiency has been remarkably enhanced in the combined system. ► Electrokinetic concentrates chromate under the electric field. ► Permeable reactive barrier media (calcined hydrotalcite) stores chromate.