Combustion synthesis of Fe3O4/Ag/C nanocomposite and application for dyes removal from multicomponent systems

Muntean, Simona Gabriela; Nistor, Maria Andreea; Ianoş, Robert; Păcurariu, Cornelia; Căpraru, Aylin; Surdu, Vasile–Adrian

doi:10.1016/j.apsusc.2019.03.161

Cited by 40 publications

(16 citation statements)

References 60 publications

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“…The experimental results also supported these findings. The values for the intraparticle diffusion rate constant (K ID ) for RSS in the adsorption process of both dyes was higher than RS, also indicating that RSS had better adsorption and more improved bonding between the adsorbent and adsorbate particles 31 – 34 , 68 , 70 – 72 .…”

Section: Adsorption Studymentioning

confidence: 93%

The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

Nizam

Hanafiah

Mahmoudi

et al. 2021

Sci Rep

185

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In this study, two biomass-based adsorbents were used as new precursors for optimizing synthesis conditions of a cost-effective powdered activated carbon (PAC). The PAC removed dyes from an aqueous solution using carbonization and activation by KOH, NaOH, and H2SO4. The optimum synthesis, activation temperature, time and impregnation ratio, removal rate, and uptake capacity were determined. The optimum PAC was analyzed and characterized using Fourier-transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), a field emission scanning electron microscope (FESEM), Zeta potential, and Raman spectroscopy. Morphological studies showed single-layered planes with highly porous surfaces, especially PAC activated by NaOH and H2SO4. The results showed that the experimental data were well-fitted with a pseudo-second-order model. Based on Langmuir isotherm, the maximum adsorption capacity for removing methylene blue (MB) was 769.23 mg g−1 and 458.43 mg g−1 for congo red (CR). Based on the isotherm models, more than one mechanism was involved in the adsorption process, monolayer for the anionic dye and multilayer for the cationic dye. Elovich and intraparticle diffusion kinetic models showed that rubber seed shells (RSS) has higher α values with a greater tendency to adsorb dyes compared to rubber seed (RS). A thermodynamic study showed that both dyes’ adsorption process was spontaneous and exothermic due to the negative values of the enthalpy (ΔH) and Gibbs free energy (ΔG). The change in removal efficiency of adsorbent for regeneration study was observed in the seventh cycles, with a 3% decline in the CR and 2% decline in MB removal performance. This study showed that the presence of functional groups and active sites on the produced adsorbent (hydroxyl, alkoxy, carboxyl, and π − π) contributed to its considerable affinity for adsorption in dye removal. Therefore, the optimum PAC can serve as efficient and cost-effective adsorbents to remove dyes from industrial wastewater.

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Section: Adsorption Studymentioning

confidence: 93%

The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

Nizam

Hanafiah

Mahmoudi

et al. 2021

Sci Rep

185

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“… 30 − 32 Fe 3 O 4 /Ag/C materials, layered perovskite La 4 Ni 3 O 10 , and Fe–Al oxide nanocomposite (IMANCs) were found to be promising adsorbents for azo dyes. 33 − 35 Carbon nanocomposites and Fe 2 O 3 (hematite nanoparticles) were used as economic adsorbents for water treatment. 36 − 39 Recently, SiO 2 –Fe Oxide nanoparticles, nanosized Bi 2 WO 6 , and magnesium oxide were synthesized for water treatment.…”

Section: Introductionmentioning

confidence: 99%

Sucrose-Triggered, Self-Sustained Combustive Synthesis of Magnetic Nickel Oxide Nanoparticles and Efficient Removal of Malachite Green from Water

Mohanta

Dey²,

Dey

2020

ACS Omega

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Dye-containing industrial effluents create major concern nowadays. To address the problem, magnetic nickel oxide nanoparticles (NONPs) were synthesized using the autopropagator combustion technique assisted by sucrose as fuel and used for the removal of toxic malachite green (MG) from water. The material was characterized by scanning electron microscopy (SEM–EDS), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), vibrating sample magnetism (VSM), point of zero charge (pH ZPC ), and Brunauer–Emmet–Teller surface area analysis. SEM images show flowerlike texture with the presence of multiple pores. VSM reveals a well-defined hysteresis at room temperature, confirming a permanent magnetic nature of the material. pH ZPC was found to be 6.63, which enables dye separation in the drinking water pH range. MG removal from water was carried out in the batch mode with optimized physicochemical parameters such as contact time, pH, temperature, and dose. Langmuir adsorption capacity was estimated to be 87.72 mg/g. Pseudo-second order kinetics ( R 2 = 0.999) and Langmuir isotherm model ( R 2 = 0.997) were found to best fit. The magnetic nature facilitates fast and quantitative separation of NONPs from solution using a hand-held magnet. Dye-loaded NONPs can be easily regenerated up to 89% and reused up to five cycles without significant loss of activity. The mechanism of adsorption is proposed to be a combination of electrostatic attraction and weak hydrogen bonding. Strategically designed straightforward synthetic protocol, low cost, high uptake capacity, and sustainable use render NONPs an ideal alternative for future dye treatment.

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“…In the case of the anionic dye (Acid Orange 7) the decreases in the removal percentage with increasing solution pH indicates that at low pH value the adsorption mechanism is well ordered by electrostatic attractions between the positively charged surface of the adsorbent material, as a result of the protonation method, and the negatively charged dye molecules. [ 22 ] In the case of the cationic dye (Basic Fuchsine), the rise in the removal efficiency with the pH increase of the solution is due to electrostatic attraction among the positively charged dye molecules and the negatively charged surface of the MOFs. To obtaine maximum efficiency, studies were performed with optimum solution pH 4.2 for Acid Orange 7 and pH 10 for Basic Fuchsine.…”

Section: Resultsmentioning

confidence: 99%

“…[ 5,12 ] Therefore, the technologies to remove dye from wastewater have attracted great attention, and multiple technologies have been developed for the elimination of organic dye contaminants from aqueous solutions. [ 13 ] Several methods are available for to displace dyes from wastewater, including filtration, [ 14,15 ] chemical oxidation, [ 16,17 ] photocatalysis, [ 18,19 ] catalytic degradation, [ 20 ] adsorption, [ 21,22 ] and coagulation/flocculation. [ 23,24 ]…”

Section: Introductionmentioning

confidence: 99%

Phosphonate metal–organic frameworks used as dye removal materials from wastewaters

Nistor

Muntean

Maranescu

et al. 2020

Applied Organom Chemis

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A very intense study class of complex porous materials, metal-organic frameworks (MOFs), composed of diverse central metallic ions attached to organic linkers, was used in this study as adsorbant materials from wastewaters. Phosphonate MOFs were prepared by the reaction of divalent inorganic salts (CoSO 4 Á7H 2 O, NiSO 4 Á6H 2 O, CuSO 4 Á5H 2 O,) with vinyl phosphonic acid in hydrothermal conditions, obtaining cobalt, nickel, and copper vinylphosphonate (CoVP, NiVP, and CuVP). During synthesis the experimental conditions were varied in terms of time, temperature, and pH. The synthesized materials were characterized by Fourier transform infrared, thermogravimetric analysis, scanning electron microscopy, and X-ray crystallography. The efficiency of MOFs as adsorbents was investigated for diverse initial dye concentrations at different pH values and at three temperatures (25, 40, and 55 C). The synthesized materials presented good efficiency in the elimination of anionic as well as cationic type of dyes from aqueous solutions. The highest adsorption capacities were obtained working at optimum solution pH 4.2 for Acid Orange 7 and 10 for Basic Fuchsine, using 1 g/L of MOFs at room temperature (25 C). The adsorption capacities increase in the following order: CuVP < NiVP < CoVP. K E Y W O R D S adsorption, dyes removal, phosphonate metal organic frameworks 1 | INTRODUCTION Industry is a huge source of water pollutants such as toxic materials, rare earth elements, and organic dyes, which are extremely harmful for people, animals, and the environment. [1-4] Worldwide, water pollution become a major environmental problem because of rapid industrialization and urbanization. [5] Pollutants from the leather, plastic, textile, paper, rubber, cosmetic, and food industries can harm environmental protection, living organisms, and global ecosystems if no suitable treatments are available. About 10-15% of commercial dyes formed from the textile industries are let out into the environment every year. [6,7] Organic dyes do not decompose readily under normal conditions because of their stable and complex chemical structures. Most of these dyes are toxic and carcinogenic. [6,8-10] Dyes are mostly stable to light, oxidizing agents, and heat, and are very soluble in water. [11] The direct release of colored wastewater into the environment disturbs its ecological status by causing numerous undesirable changes. [8,11] As regulation has become stricter, significant importance has been given to the treatment of dye-containing wastewaters. [5,12] Therefore, the

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Combustion synthesis of Fe3O4/Ag/C nanocomposite and application for dyes removal from multicomponent systems

Cited by 40 publications

References 60 publications

The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

Sucrose-Triggered, Self-Sustained Combustive Synthesis of Magnetic Nickel Oxide Nanoparticles and Efficient Removal of Malachite Green from Water

Phosphonate metal–organic frameworks used as dye removal materials from wastewaters

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