AvaliaÃÃo do processo de adsorÃÃo da microcistina-LR por carvÃo ativado

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Because of the increase of the number of reports of acute and chronic intoxications, as much in animals as in human beings, for toxins produced by cyanobacteria in the water, there is already a great concern on the part of the companies responsible for the treatment and distribution of drinking water. The application of adsorption process for coal activated in systems of treatment of water has been used widely for the removal of specific pollutants. In this work the efficiency in the adsorption of the toxin microsystin-LR was analyzed, it is the most commonly found all over the world, in purified water, by powdered activated coal (PAC) produced starting from agricultural residues and/or industrial rejects (the green coconut mesocarp , pulp of the sugarcane, green coconut endocarp and textile residue). The coal produced starting from the green coconut mesocarp showed a better adsorptive feature , evaluate by the BET area, the number of iodine and metileno blue index . With this coal the kinetic evolution was evaluated and built the isotherm of adsorption of the microsystin-LR . The Langmuirâs model applied for the data in the kinetic model showed a satisfactory result for the hypothesis of a model of first order and the isotherms presented a class 1 behavior, reaching a balance in 120 h. The maximum adsorption capacity found of AC of the green coconut mesocarp was 69,9 mgg-1, what shows a good capacity of adsorption when compared to the other adsorbents mentioned in the literature

ASSUNTO(S)

microsystin-lr cyanobacteria cianobactÃrias adsorption microcistina-lr adsorÃÃo engenharia quimica carvÃo ativado activated carbon

ACESSO AO ARTIGO

Documentos Relacionados