Use of macrophites for removal of metals in liquid effluents, using instrumental neutron activation analysis
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2017
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60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS
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This study proposes the application of Eichhornia crassipes biomass, abundant in
the dams of São Paulo state, to remove metallic ions from solution, aiming its application
to effluent treatment. The efficiency of adsorption was tested by the Zn, Fe,
Cr, Co removal from solutions containing these elements. The plants, for biomass
production, were collected at the Billings reservoir in São Bernardo do Campo, located
in the Southeast of São Paulo Metropolitan Region. After collection, the
plants were washed and dried in a ventilated oven from 60 C to 70 C, crushed and
passed through a 150 m sieve. The biomass thus obtained was subjected to the
chemical activation process by the treatment with 0.1 mol L1 solution of HCl and
0.1 mol 1 of NaOH in order to increase its surface area. The tests indicated that
the treatment with HCl was the most effective and this was used in the preparation
of the biomass for the adsorption tests of the metallic ions. The adsorption tests
were carried out, at first, to verify the effect of the pH and the contact time between
the sample and the adsorbent in the adsorption process. The concentrations of Zn, Fe, Cr and Co, present in the solution, before and after the treatment, were
determined by the instrumental neutron activation analysis (INAA) technique. For
this determination the samples were irradiated for 8 hours at the IEA-R1 reactor
at IPEN. The concentrations were determined by comparing the peak area of the
samples and that of the reference materials irradiated together with the samples.
Como referenciar
OLIVEIRA, J.A.S.; SILVA, P.S.C. Use of macrophites for removal of metals in liquid effluents, using instrumental neutron activation analysis. In: 60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS, November 28 - December 01, 2017, São Paulo, SP. Abstract... São Paulo, SP: Instituto de Pesquisas Energéticas e Nucleares, 2017. p. 30-31. Disponível em: http://repositorio.ipen.br/handle/123456789/28726. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.