Water pollution is an ever growing problem, due to global rapid industrial and population growth. Fresh water resources are limiting, and with deteriorating quality due to pollution the pressure is growing to find a solution to pollution problems. A significant cause for concern are contaminants of emerging concern, natural and artificial compounds with little know interactions with the ecosystem, which aren't adequately removed by conventional wastewater treatment technologies. Pharmaceuticals are considered to be among contaminants of emerging concern. Diclofenac (DCF) is one of the most common pharmaceuticals detected in water and is a great cause for concern in wastewater effluents. Current wastewater treatment technologies are inadequate for DCF removal. Advanced oxidation processes show promise for successful DCF removal, especially photocatalytic processes which offer significant economic advantages when harvesting solar irradiation. TiO2-SnS2 is considered to be a promising photocatalyst, combining advantages of both components and providing improved photocatalytic activity under solar irradiation. The aim of this study was to investigate DCF adsorption (removal) on immobilized TiO2-SnS2 films. Immobilized films were obtained by sping coating a sol-gel precursor on glass plates. Adsorption phenomena are of great importance in photocatalysis and are a key for process optimization. The point of zero charge (PZC) for TiO2-SnS2 was experimentally determined to be at pH 4.5. The highest equilibrium adsorption capacity of 34.57 mg (DCF) per g (TiO2-SnS2) was achieved at pH 4. Favorable electrostatic interactions occur at pH sub PZC, owing to positive surface charge of the photocatalyst attracting electronegative functional groups of DCF. However adsorption capacity is significantly reduced at pH > PZC, due to unfavorable surface interactions. Equilibrium adsorption (removal) was achieved at 90 min at pH 4 and shaker setting of 90 rpm. A good correlation at investigated pH was achieved when testing pseudo-first order kinetics, which is in accordance to expectations from literature. The kinetic rate of adsorption was limited by mass transfer in the reactor.