Influence of Magnetic Field Frequency Generated by Permanent Magnets in Mixed Culture Used for the Treatment of Effluent Contaminated with Chromium

Dias, R. M.; Cardoso, V. L.; de Resende, M. M.

Influence of Magnetic Field Frequency Generated by Permanent Magnets in Mixed Culture Used for the Treatment of Effluent Contaminated with Chromium

2016

Dias, R. M. | Cardoso, V. L. | de Resende, M. M.

This study focused on the treatment of effluent contaminated with chromium, being driven by the application of magnetic field studies in living cells and organisms. The objective was to quantify the removal of chromium(VI), total chromium, and total organic carbon (TOC) by applying a magnetic field generated by permanent magnets of neodymium in mixed culture. The resistance of microorganisms was evaluated for 4 h and 17 min against the application of a magnetic field at frequencies of 3, 5, and 10 Hz, which correspond to flow rates of 3.93, 7.07, and 14.92 cm³ s⁻¹ in the system loop, respectively. The initial concentration of Cr(VI) was 100 mg L⁻¹. The magnetic field frequency of 5 Hz showed a higher removal of Cr(VI) (100 %), total chromium (82 %), and TOC (34 %) compared with frequencies of 3 and 10 Hz and the absence of magnetic field exposure.

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