Utilização do vermicomposto como material adsorvente no tratamento de residuos de laboratorio

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

In this work, the use of vermicompost as an adsorbent to remove Cd(II), Cu(II), Pb(II) and Zn(II) ions from laboratory effluents was proposed. Experiments were carried out in a glass column coupled to a peristaltic pump. Parameters such as adsorption pH, vermicompost mass, flow rate and particle size ranges for a multi-component solution were studied. An optimum pH range from 2.5 to 5.0 was found, where the metal adsorption was only slightly affected. The optimum flow rate and particle size were 5 ml/min and 150 mm, respectively. The maximum adsorption capacity for vermicompost was determined from single solutions. The values obtained were 33.0, 32.6, 92.9 and 28.4 mg/g for Cd(II), Cu(II), Pb(II) and Zn(II), respectively. After optimization, laboratory effluent samples were submitted to treatment with vermicompost. With the results obtained, it was possible to note the potentialities of this material in effluent treatment, especially due to its high adsorption capacity, low price and easy acquisition. Studies focusing on nutritional/phytotoxicological aspects of vermicompost saturated with metal were made.

ASSUNTO(S)

tratamento de efluentes metais

ACESSO AO ARTIGO

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