Navegando por Palavras-chave "Água De Dessalgação"

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    Emprego de adsorventes para tratamento de água de dessalgação de petróleo
    (Universidade Federal de São Paulo (UNIFESP), 2021) Cardona, Debora Selene [UNIFESP]; Araújo, Geórgia Christina Labuto [UNIFESP]; Universidade Federal de São Paulo
    Desalting is an oil washing process to remove possible contaminants, such as salts and metals. It is a necessary step and it is carried out at oil refineries so that the final product has the necessary quality and avoid possible wear and tear on oil transportation pipes, engines and factory machinery. As it’s a waste that can contain several contaminants, its treatment is necessary. In this work, characteristics of the four desalting water samples (AD1, AD2, AD3 and AD4) were determined, such as total solids content, soluble and suspended solids content, present amount of oil, pH and conductivity. We also quantified heavy metals in the samples, using ICP-MS as a quantitative technique, and direct analysis with sample dilution at a salt concentration level up to 4000 times lower was used as a method, and the sensitivity was compared when using calibration curve in two different media. A preliminary study was carried out to assess the ability of metal analytes to be removed by activated carbons, in one case conditioning the experiment solution and the other where the activated carbon has been conditioned. The pH of samples AD1, AD2, AD3 and AD4 were 5.30 ± 0.01, 5.50 ± 0.01, 8.47 ± 0.01 and 8.67 ± 0.01 respectively. The amount of emulsified oil found in AD1, AD2, AD3 and AD4 was 75465 ± 26378 mg/L, 87755 ± 10995 mg/L, 72470 ± 18899 mg/L and 71033 ± 7337 mg/L respectively. In samples AD1 and AD3, no suspended solids were found, but AD2 presented 1347.2 ± 444.90 mg/L and AD4 113.24 ± 19.643 mg/L. The soluble solids found in the samples were 897.05 ± 7.3403 mg/L, 6608.2 ± 267.89 mg/L, 72220 ± 427.50 mg/L and 43336 ± 473.88 mg/L, respectively. The samples showed different amounts of the 27 investigated analytes. The use of the collision cell proved to be important for improving the sensitivity of the technique using the dilution of the samples. It was found that all samples require treatment due to the presence of analytes and oil, which are above what is allowed by the current legislation in Brazil. Conditioning the activated carbon allowed to occurs the sorption of the analytes from the tested solutions. The application of activated carbon for the treatment of desalination water may have positive results with conditioning.