The present invention is a fiber material including blended fibers having a plurality of types of solid fibers having a cross-sectional shape in common, the compositional ratio of at least two types of the plurality of types of fibers with respect to the entire quantity of the blended fibers being at least 5.0%, and when the fibers having the highest surface area increase represented by formula (1) among the plurality of types of fibers for which the compositional ratio is at least 5.0% are designated as fibers (max), and the fibers having the lowest surface area increase represented by formula (1) are designated as fibers (min), the surface area increase of the fibers (min) is at least 3.0% lower than that of the fibers (max), the compositional ratio of the fibers (max) with respect to the entire quantity of the blended fibers is at least 30.0%, the compositional ratio of the fibers (min) with respect to the entire quantity of the blended fibers is at least 8.0%, and the fibers (max) (a) have a surface area increase of at least 1.20, (b) are porous, and (c) have a pore specific surface area of at least 5 m2/g. (1): Surface area increase = (Perimeter of fiber cross section)/(Circumference of a circle having the same cross-sectional area as the fiber cross section). The present invention makes it possible to provide a fiber material which uses fibers capable of efficient adsorption of a substance to be removed from a liquid to be treated, and a purification column in which the fibers are incorporated.
