Dielectric material and a preparation method of removing heavy metals arsenic-contaminated groundwater

A method of removing heavy metals dielectric material arsenic contamination of groundwater, by manganese, sepiolite, straw, animal waste, activated sludge and active agents in a mass ratio of 1: 0.2 to 0.5: 0.5 to 1: 0.2 to 0.4: 0.2 to 0.4: 0.0005 to 0.002 after mixing, composting, carbonization, crushing the particulate material having an average particle diameter of 1 ~ 3cm. The present invention also discloses a process for preparing such a dielectric material. Dielectric material of the present invention are effective to remove arsenic from groundwater multivalent long service life, does not cause secondary pollution of groundwater.