The present invention discloses a method for removing
arsenic from an acid solution, and relates to the technical field of
hydrometallurgy, wherein TiO2 and nH2O can be adopted to carry out absorption removal of trivalent
arsenic and pentavalent
arsenic from a H2SO4 solution containing 10 mg / L-30 g / L of arsenic and a HCl solution containing 10 mg / L-30 g / L of arsenic, and acidity of an acid solution is 0.5-150 g / L. The adopted removal method can comprises: carrying out nature infiltration through an
ion exchange column, carry out vacuum
filtration, stirring according to a liquid-
solid ratio, and carrying out pressure
filtration with a pressure filter, wherein a 10-20% NaOH solution is adopted to wash and regenerate TiO2 absorbing arsenic and nH2O absorbing arsenic, an arsenic
absorption effect is not reduced, the alkali washing solution is treated to obtain a
sodium arsenate crystal containing more than 50% of arsenic, Zn<2+> and In<3+> are not be absorbed during arsenic removal processes of a
zinc sulfate solution and an
indium chloride solution, and arsenic and
germanium are absorbed in a Ge-containing solution. With the method, arsenic can be effectively recovered, the problem of secondary
pollution of arsenic in other methods is solved, and a certain economic value is produced.