Synthesis of mesoporous triple-metal nanosorbent from layered double hydroxide as an efficient new sorbent for removal of dye from water and wastewater

• Published in: Ecotoxicology and environmental safety Vol. 159; pp. 332 - 341
• Main Authors: Kostić, Miloš, Radović, Miljana, Velinov, Nena, Najdanović, Slobodan, Bojić, Danijela, Hurt, Andrew, Bojić, Aleksandar
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Inc 15-09-2018
• Subjects: Adsorption; Anthraquinones; Coloring Agents; Copper; Ferric Compounds; Hydroxides; Isotherms; Kinetics; Layered double hydroxide; Mesoporous triple-metal nanosorbent; Metal Nanoparticles - chemistry; Metal Nanoparticles - ultrastructure; Nickel; Reactive Blue 19; Waste Water - chemistry; Wastewater; Water Pollutants, Chemical; Water Purification - methods; Mesoporous triple-metal nanosorbent; Kinetics; Wastewater; Layered double hydroxide; Isotherms; Reactive Blue 19
• ISSN: 0147-6513; 1090-2414
• DOI: 10.1016/j.ecoenv.2018.05.015

In this study, co-precipitation synthesis of the mesoporous triple-metal nanosorbent from Fe, Cu, Ni layered double hydroxide (FeCuNi-LDH), on the basis of the data obtained from the TG analysis was carried out. The FTIR spectroscopy and XRD results confirm the formation of CuO, NiO and Fe2O3 nanoparticles, while the EDX analysis does not show significant variations on the surface in elemental composition. BET analysis shows that FeCuNi-280 (FeCuNi-LDH calcinated at 280 °C) with mesoporous structure, has larger surface area compared to FeCuNi-LDH and FeCuNi-550 (FeCuNi-LDH calcinated at 550 °C). The value of pHPZC of FeCuNi-280 is found to be 8.66. Obtained FeCuNi-280 material showed the ability for efficient removal of dye Reactive Blue 19 (RB19) from water, with a very high sorption capacity of 480.79 mg/g at optimal conditions: the sorbent dose of 0.6 g/dm3, stirring speed of 280 rpm and pH 2. The kinetics results of the sorption process were well fitted by pseudo-second order and Chrastil model, and the sorption isotherm was well described by Sips, Langmuir and Brouers–Sotolongo model. FeCuNi-280 was easily regenerated with aqueous solution of NaOH, and reutilization was successfully done in five sorption cycles. The present study show that easy-to-prepare, relatively inexpensive nanosorbent FeCuNi-280 is among the best sorbents for the removal of RB19 dye from water solution and wastewater from textile industry in wide range of pH.
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•Mesoporous triple-metal composite was obtained by calcination of layered double hydroxide.•FeCuNi-280 is more efficient sorbent than FeCuNi-LDH and FeCuNi-550.•FeCuNi-280 has very high sorption capacity for RB19 in wide range of pH.•FeCuNi-280 was easily regenerated and reutilization was successful.•The FeCuNi-280 is efficient sorbent for the removal of dyes from water and wastewaters.