Bioadsorción de arsénico con biomasas de marlo de maíz y cascarilla de arroz en relaves mineros en cantón Ponce Enríquez

Abstract

The present research seeks the bioadsorption of arsenic with vegetable biomasses of corn stalk (Zea Mays L.) and rice husk (Oryza Sativa). Initially, the mining tailings were analyzed to confirm the presence of As metal, determined by the PEE-GQM-FQ33 method, 20 liters of tailings were obtained; then, 500 g of rice husks and 500 g of corn stover were collected, washed, dried and ground. The biomasses, physical and chemical parameters such as pH were characterized by the ME-LB-219 method and moisture by the ME-LB-072 ISO 6496:1999 method. The research design consisted of 4 treatments with their respective variables of 0, 4 and 8 hours and the dosage of 12 and 16 grams, the biomass was left in the water and after a certain time the biomasses were filtered, the water samples were packed in polyethylene bottles to analyze the final arsenic concentration. The values obtained exceeded the initial value, and it is presumed that the biomasses contained arsenic, although this cannot be verified because the laboratory did not perform such analyses. The area where the samples were taken is irrigated with water from the Arenillas river, which is full of heavy metals, and the fertilizers have a certain amount of arsenic in their composition and its constant use causes it to accumulate in the soil of the crops.