The use of Crambe abyssinica seeds as adsorbent in the removal of metals from waters

This study aimed to evaluate the efficacy of crambe seeds (Crambe abyssinica Hochst) as adsorbent material in the removal of the toxic metals cadmium, lead and chromium from contaminated solutions. The byproduct was obtained from oil extraction of crambe seeds in a Soxhlet system. In kinetic tests, the adsorbent masses had varied in solutions containing the metals under pH 5.0 and 7.0. Metal concentrations were determined by flame atomic absorption spectrometry (FAAS). According to optimal conditions found, the adsorption assays were performed for obtaining the isotherms of each metal, which were linearized in agreement with the mathematical models of Langmuir and Freundlich. According to the obtained results, the adsorbent was effective in removing the assessed metals in aqueous solutions, being feasible its employment as an alternative material for the adsorption of metals, besides being a byproduct, which has undergone no prior treatment.

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Bibliographic Details
Main Authors: Gonçalves Jr.,Affonso C., Rubio,Fernanda, Meneghel,Ana P., Coelho,Gustavo F., Dragunski,Douglas C., Strey,Leonardo
Format: Digital revista
Language:English
Published: Departamento de Engenharia Agrícola - UFCG 2013
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000300009
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