Caracterização e análise do potencial da água produzida como alternativa para reúso

Abstract

In semiarid regions, water scarcity is a problem that jeopardizes the sustainability of regional socioeconomic development. The present work aimed to evaluate the quality of produced water from the oil industry in northeastern Brazil in the municipality of Mossoró-RN and its potential use in irrigation. Produced water samples were evaluated for physicochemical characterization (pH, conductivity, total dissolved solids, salinity, alkalinity, carbonate, bicarbonate, calcium, magnesium, hardness, chloride, sodium, potassium, nitrate, sulfate, iron) and toxicological (metals). heavy duty: cadmium, copper, lead, chrome, manganese, nickel, zinc and aluminum in addition to TOG). Regarding the physicochemical analyzes, NaHCO3, Ca2+, Mg2+, K+ and Cl- values were outside the thresholds considered by the EMBRAPA irrigation manual. For toxicological analysis all metals were compliant and only TOG exceeded the limit allowed by CONAMA n° 430/2011 which deals with the management of effluent discharge, indicating the need to incorporate processes to eliminate and or minimize the occurrence of these compounds, since the water used in this study was an effluent, without any treatment, ensuring the sanitary safety of this resource in irrigation practices. Thus, the produced water can be considered an alternative water resource for irrigation after proper treatment.