Method used for reinforced electric restoration of arsenic chromium composite polluted soil with reducing agent/chelating agent

The invention discloses a method used for reinforced electric restoration of arsenic chromium composite polluted soil with a reducing agent/a chelating agent. The method comprises following steps: a,arsenic chromium composite polluted soil is subjected to air drying and crushing so as to obtain arsenic chromium composite polluted soil powder; b, calcium chloride and aluminium chloride hexahydrateare stirred to be uniform so as to obtain a mixed solution; with nitrogen gas introduction and stirring, a sodium hydroxide solution is added into the mixed solution so as to obtain a layered doublehydroxide solution; with nitrogen gas introduction, washing, drying, and grinding are carried out so as to obtain a layered double hydroxide powder; and c, the arsenic chromium composite polluted soilpowder and the layered double hydroxide powder are introduced into the space between two permeable reactive barriers of an electrokinetic remediation-permeable reactive barrier (EK-PRB) restoration device, reducing agents or co