Remoção de corantes em efluentes têxteis utilizando espumas de poliuretano e resíduos de sementes de Mabea fistulifera Mart. / Dye removal in textile effluents using polyurethane foams and residues of Mabea fistulifera Mart.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The absorption is successfully used in removing the organic contaminants found in textile effluent. This work proposes the use of alternative absorbents to remove the direct dyes (Direct Red 80) and reactive (Reactive Blue 21) in aqueous solutions and in effluent samples. Two absorbents were tested: the synthetic polyurethane foams (EPUs) and the seed residue of Mabea fistulifera Mart. Tests in boatload were carried out, including the conduction of kinetic tests, pH influence, adsorptive and desortive test. In addition, the adsorption-coagulation combined treatment was tested by using ferric chloride as a coagulant agent resulting in removal percentages over 99%. Also, experiments filled with polyurethane foams were tested incolumn of fixed bed obtaining values of removal over 80% for 30 mg L-1 concentration for both dyes. By using residues of Malbea seed, boatload experiments were carried out embodying kinetic and adsorptive tests and examination of the pH influence. However, both absorbents were tested for the removal of effluent samples fortified with dye solutions. When the EPUs were applied, the recovery of RB21 dye was 70% and 94% for DR80. Furthermore, when the seed residues were used, the RB21 reached a percentage of 74 and 95% for DR80.

ASSUNTO(S)

alternative absorbents adsorção adsorventes alternativos absorption corantes quimica analitica dye

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