Manganese/oxygen compound with arsenic adsorption, arsenic adsorbent, and method of adsorptively removing from aqueous solution

摘要

A novel technique by which not only pentavalent arsenic but trivalent arsenic, which has been difficult to remove, can be efficiently removed. The manganese/oxygen compound which adsorbs arsenic is characterized by being a product of burning or heating which comprises an oxygen compound of bismuth and an oxygen compound of manganese and by containing manganese as a major component. It is used to treat an aqueous arsenic solution to thereby adsorptively remove the arsenic.