In this research it was evaluated the influence of the calcination temperature and particle size of the scallop shell, on the percentage removal of trivalent chromium in aqueous solutions artificial cromo3 + was assessed by a precipitation process For research 8 kg of scallop shell was obtained, the company obtained Aquaculture and Fisheries Group Acuapesca S.A.C. Located in the Panamericana Norte Highway Km. 383.3 in Casma. The collection of these samples was made randomly. Which they were washed with water and detergent that removed all impurities. It was triturated using a clap stone and then ground by a ball mill, where the particle size was reduced according to ASTM EN ° 100 (≤0.149mm,> 0.074mm), No. 200 (≤0.074mm, > 0.044mm) and No. 325 (≤0.044mm), screened with stainless steel mesh and stored in airtight bags. To test removal 8 liters obtained an artificial solution of triv...