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Removal of Organophosphorus Pesticides from Aqueous Solution by Magnetic Fe 3 O 4 /Red Mud‐Nanoparticles
Author(s) -
Aydin Senar
Publication year - 2016
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143016x14733681696004
Subject(s) - sorption , red mud , adsorption , aqueous solution , freundlich equation , chemistry , langmuir adsorption model , nuclear chemistry , langmuir , diffusion , nanoparticle , chromatography , chemical engineering , materials science , nanotechnology , organic chemistry , engineering , physics , thermodynamics
The aim of this study was to investigate the usability of magnetic Fe 3 O 4 /red mud nanoparticles (NPs) for the removal of organophosphorus pesticides from water samples. The effect of various experimental parameters such as red mud amount in Fe 3 O 4 /red mud‐NPs, pH, contact time, initial pesticide concentrations and adsorbent dose was studied in order to find the optimum conditions for their removal in a batch process. The Fe 3 O 4 /red mud‐NPs were characterized by using TGA, SEM, XRD, VSM, and determination of the BET surface area. After the regenerated Fe 3 O 4 /red mud‐NPs were used three times, the sorption capacity and the magnetic separability were observed to be unaffected. Freundlich model described the sorption process better than Langmuir isotherm and the pseudo second‐order kinetic model was determined as the best‐fit model. The film diffusion mechanism was found to be a main rate control mechanism. The Fe 3 O 4 /red mud‐NPs satisfactorily removed the OPP S from real water samples.