The present research focused in the feasibility of using a common, inexpensive, and non‐toxic material as titanium dioxide (TiO2) for arsenite (As(III)) removal from aqueous solutions. Batch experiments were conducted to test the effects of adsorbent dose, contact time, and stirring speed. The As(III) removal has been carried out under natural environment conditions (temperature 23 ± 3°C and water pH 8 ± 0.2). Results show that the kinetic rate of As(III) adsorption was higher in the first 30 min and decreases thereafter. The maximum removal efficiency was 96% with 1.5 g/L in 1.5 h of contact time. The As–TiO2 system has reached equilibrium in 1 h, regardless of the titanium dioxide dosage. The adsorption process was best described by the Freundlich's isotherm model, which indicates that the multilayer adsorption should be involved in the process of As(III) removal. The contact between the As(III) and TiO2 was done mainly by convection and diffusion. The mass transfer coefficient (β) has been found between 0.8 × 10−5 and 12.3 × 10−5 cm/s. The thermodynamic analysis showed a feasible, spontaneous, and exothermic adsorption process. TiO2 is a safe substance for human health and is a feasible and efficient alternative treatment for arsenic removal from water.Chronic exposures at low‐level of arsenic will cause adverse health effects. TiO2 is a feasible low‐cost material for remove arsenic. Reaction mechanisms, the zeta potential and adsorption kinetics were analyzed. A dose of 1.5 g/L removed 92% (Co = 120 µg As/L) of arsenic in 0.9 h. This conditions allows to get a treated water quality in agreement with the international standards (<10 µg/L).

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