Multi-element internal electrolysis filler and preparation method thereof

The invention relates to multi-element internal electrolysis filler and a preparation method thereof. The multi-element internal electrolysis comprises the following components of: 30-60% of iron scraps, 5-18% of copper alloy scraps and 35-52% of active carbon. A process comprises the following steps of: mixing the iron scraps and the copper alloy scraps according to a component ratio; firstly immersing by utilizing an alkaline solution to remove dust and oil on the surfaces of the iron scraps and the copper alloy scraps; repeatedly washing by using clean water; immersing by utilizing an acid solution to remove oxidized films and rusts on the surfaces of the iron scraps and the copper alloy scraps; repeatedly washing by using the clean water; adding the treated iron scraps and the treated copper alloy scraps into a reactor to be mixed uniformly; and adding active carbon grains, and agitating and shaking the reactor until the active carbon grains sufficiently enter gaps among the iron scraps and the copper all