Method for removing arsenic from acid solution

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 and In are not be absorbed during arsenic removal processes of a zinc sulfate sol