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Magnetically assisted coagulation using iron oxide nanoparticles-Leucaena leucocephala seeds’ extract to treat synthetic Congo red wastewater by H. Kristianto; M. Y. Tanuarto; S. Prasetyo; A. K. Sugih is a Environmental Science article available to read on EtoBox.

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This study focused on utilization of Leucaena leucocephala seeds' extract and iron oxide nanoparticles (IONPs) under magnetic field to provide effective coagulation process. Leucaena seeds' extract was obtained using 3 M NaCl solution as solvent at feed-to-solvent mass ratio of 1:20. IONPs were synthesized using co-precipitation method. The obtained IONPs were analyzed using scanning electron microscopy, X-ray diffraction and transmission electron microscopy. Based on analysis results, the obtained IONPs were the agglomerate of Fe 3 O 4 phase with average particle diameter of 14.6 nm. The extract and IONPs were used as natural coagulant at various pHs (3-12), coagulant dosages (4-40 mL extract/L), and IONPs concentrations (0.5-3 mg/mL extract) under external magnetic field. It was obtained that pH 3 was the best pH because positively charged Leucaena protein at pH 3 acts to neutralize negatively charged Congo red molecules. The highest removal was obtained at coagulant dosage of 20 mL/L, and further increase in dosage was decreasing the removal due to colloid re-stabilization effect. The variation of IONPs concentration did not give any effect on the %removal and sludge volume. How

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Author

H. Kristianto; M. Y. Tanuarto; S. Prasetyo; A. K. Sugih

Publisher

Springer-Verlag; Islamic Azad University of Research and Technology; Springer Science and Business Media LLC (ISSN 1735-1472)

Published

2020

Language

EN

Field

Environmental Science (Physical Sciences)