Estudo sobre a utilização da lama vermelha para a remoção de corantes em efluentes têxteis Study on the use of red mud for removal of dyes from textile effluents

• Main Authors: Ernesto Batista da Silva Filho, Maria Cristina Moreira Alves, Maurício da Motta, Eveline Haiana da Costa Oliveira, Walter Brander Junior
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2008-01-01
• Series: Química Nova
• Subjects: Fenton reagent; alternative adsorption; Bayer process
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422008000500008

<abstract language="eng">Red mud is the principal residue of the alumina (Al2O3) industry. Generated during the Bayer process, it is characterized by strong alkalinity and ion exchange. Iron oxides are the principal component (30 to 60%). Annually millions of tons of red mud are generated in the world. Red mud disposal is responsible for a large part of the cost of alumina production. On the other hand, textile industry wastewaters containing dyes have a great impact on the environment and on human health. In this paper the possibility of applying red mud for the removal of dyes was investigated by two processes: adsorption and degradation by the Fenton reagent.