Magnetic activated carbon synthesized using rubber fig tree leaves for adsorptive removal of tetracycline from aqueous solutions

Vinayagam, Ramesh; Quadras, Melisha; Varadavenkatesan, Thivaharan; Debraj, Devangshi; Goveas, Louella Concepta; Samanth, Adithya; Selvaraj, Raja

doi:10.1016/j.envres.2022.114775

Cited by 28 publications

(11 citation statements)

References 53 publications

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“…13 b). The R 2 was found to be close to the unit (0.9998), these findings confirmed the chemisorption process [ 39 ]. The estimation of the adsorption maximum capacity “q e “value was found to be 82.1 mg/g which was very close to the experimental value of 81.0 mg/g after passing 6 hrs from the start of the adsorption process.…”

Section: Results and Dissectionsupporting

confidence: 71%

“…Green synthesis has several benefits in nanoscience and technology. The use of environmentally friendly raw materials and non-toxic diluters is critical in the production and processing of nanoparticles, necessitating the employment of environmentally acceptable techniques [ 37 – 39 ]. Many different parts of several plants could be used for the green bio-fabrication of Cu NPs [ 40 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

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Biosynthesis approach of copper nanoparticles, physicochemical characterization, cefixime wastewater treatment, and antibacterial activities

2023

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The aim of this paper is the green synthesis of copper nanoparticles (Cu NPs) via Quinoa seed extract. X-ray diffraction (XRD) results confirmed the production of the pure crystalline face center cubic system of the Cu NPs with an average crystallite size of 8.41 nm. Infrared spectroscopy (FT-IR) analysis confirmed the capping and stabilization of the Cu NPs bioreduction process. UV visible spectroscopy (UV–Vis). surface plasmon resonance revealed the absorption peak at 324 nm with an energy bandgap of 3.47 eV. Electrical conductivity was conducted assuring the semiconductor nature of the biosynthesized Cu NPs. Morphological analysis was investigated confirming the nano-characteristic properties of the Cu NPs as polycrystalline cubic agglomerated shapes in scanning electron microscopy (SEM) analysis. Transmission electron microscopy (TEM) analysis also was used to assess the cubic shapes at a particle size of 15.1 ± 8.3 nm and a crystallinity index about equal to 2.0. Energy dispersive spectroscopy (EDX) was conducted to investigate the elemental composition of the Cu NPs. As a potential utility of the biosynthesized Cu NPs as nano adsorbents to the removal of the Cefixime (Xim) from the pharmaceutical wastewater; adsorption studies and process parameters were being investigated. The following strategic methodology for maximum Xim removal was conducted to be solution pH 4, Cu NPs dosage 30 mg, Xim concentration 100 mg/L, and absolute temperature 313 K. The maximum monolayer adsorption capacity was 122.9 mg/g according to the Langmuir isothermal model, and the kinetic mechanism was pseudo-second-order. Thermodynamic parameters also were derived as spontaneous chemisorption endothermic processes. Antibacterial activity of the Xim and Xim@Cu NPs was investigated confirming they are highly potent against each Gram-negative and Gram-positive bacterium.

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Section: Results and Dissectionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Biosynthesis approach of copper nanoparticles, physicochemical characterization, cefixime wastewater treatment, and antibacterial activities

2023

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“… 18 , 19 . Iron-based nanoparticles possess remarkable characteristics, including reactivity, biocompatibility, and thermal and chemical stability 20 , 21 . According to reports, the uniquely developed iron-based nanoparticles/BC composite might inherit the benefits of iron and biochar to improve catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

A smart and sustainable pathway for abatement of single and binary mixtures of dyes through magnetically retrievable Ca4Fe9O17 anchored on Biochar matrix

Yadav

Mishra

Gadore

et al. 2023

Sci Rep

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In this work, the author developed Ca4Fe9O17/biochar (CFB) via a green method through a facile co-precipitation procedure involving egg shells as calcium precursor and investigating its performance in single as well as binary solution of methylene blue (MB) and rhodamine B (RhB). The CFB nanocomposite was characterized by XRD, SEM, TEM, XPS, Raman, FTIR, BET, and VSM. ESR studies show the presence of hydroxyl (·OH) and superoxide (O2·¯) radicals, which are primary radical species for pollutant degradation. The average crystalline size of CFB nanocomposites was found to be 32.992 nm using XRD, whereas TEM analysis indicates a particle diameter of 35–36 nm. The degradation efficacy of MB and RhB dyes was achieved at 99.2% and 98.6%, respectively, in a single solution, whereas 99.4% and 99.2%, respectively, in a binary solution within 36 min. Additionally, an iron cluster was formed during the degradation process of MB dye. The degradation of organic contaminants and generation of iron clusters from the degraded dye products were both expedited by the remarkable extension effect of the Ca4Fe9O17 in the CFB nanocomposites. The three processes were achieved using CFB nanocomposite: (1) the advanced oxidation process; (2) degradation of MB and RhB dye in single as well as binary solution with enhanced efficiency, (3) the production of the iron cluster from degraded products. Thus, these three steps constitute a smart and sustainable way that leads to an effective effluent water treatment system and the generation of iron clusters preventing secondary pollution.

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“…[23] Preparation of adsorbents for drug 2,4-Dichlorophenoxyacetic acid (2,4-D) removal from aqueous environments using magnetic Fe 2 O 3 as a magnetic material by Raja et al [24] Adsorption of tetracycline by magnetic activated carbon (RFAC@Fe 2 O 3 ) prepared by Ramesh Vinayagam using activated carbon and iron oxide nanoparticles. [25] In contrast, CMIET resins use γ-Fe 2 O 3 as the magnetic material, which is ferromagnetic and can exhibit spontaneous magnetisation in the absence of a magnetic field, high magnetisation strength and high coercivity, [26] and can be separated quickly and efficiently without an applied magnetic field, making the application scenario more versatile, efficient and convenient, [27] Indirectly, the removal efficiency is improved. At present, magnetic resins are used in conventional fixed bed equipment, where adsorption and regeneration are intermittent and cannot be carried out simultaneously, and regeneration efficiency decreases over time; CMIET can be better used in flowing beds, where adsorption and regeneration can be carried out simultaneously, ensuring stable water quality after discharge and improving treatment efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…These Fe 3 O 4 magnetic resins are paramagnetic and exhibit superparamagnetic properties in a magnetic field environment, [22] and the suspended superparamagnetic resin can be quickly separated from the aqueous environment by applying an external magnetic field [23] . Preparation of adsorbents for drug 2,4‐Dichlorophenoxyacetic acid (2,4‐D) removal from aqueous environments using magnetic Fe 2 O 3 as a magnetic material by Raja et al [24] Adsorption of tetracycline by magnetic activated carbon (RFAC@Fe 2 O 3 ) prepared by Ramesh Vinayagam using activated carbon and iron oxide nanoparticles [25] …”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Novel Porous Self‐Settling Magnetic Anion Exchange Resin and its Removal Mechanism for Tannic Acid

Xiao,

Wang,

et al. 2023

ChemistrySelect

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A new porous self‐precipitating magnetic anion exchange resin (CMIET) doped with γ‐Fe2O3 was prepared by suspension polymerisation and characterized by FT‐IR, TGA, SEM, BET, and VSM. An adsorbent with a rough surface porous structure, enriched with a mesoporous strong magnetic self‐absorbent was obtained. A specific surface area of 19.10 m2/g, a pore volume of 0.2045 cm3/g, a pore size of 36.71 nm exchange capacity of 7.81 mmol/g, and an equilibrium adsorption capacity of up to 46.28 mg/g were measured. The effects of contact time, initial concentration, and solution pH were investigated by batch adsorption experiments. In the removal process, the removal rate of TA was up to 95 % at pH=4–7, saturation adsorption was achieved in 30 min, and regeneration time of 120 min could restore the resin activity. The adsorption isotherm of TA on the resin was by the Langmuir model, the adsorption kinetics was by the Pseudo Secondary Kinetic model, and the adsorption process was spontaneous heat absorption. The regeneration experiments showed good reusability of CMIET, a highly efficient and fast magnetic ion exchange resin with a wide range of applications in the aqueous environment.

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Magnetic activated carbon synthesized using rubber fig tree leaves for adsorptive removal of tetracycline from aqueous solutions

Cited by 28 publications

References 53 publications

Biosynthesis approach of copper nanoparticles, physicochemical characterization, cefixime wastewater treatment, and antibacterial activities

Biosynthesis approach of copper nanoparticles, physicochemical characterization, cefixime wastewater treatment, and antibacterial activities

A smart and sustainable pathway for abatement of single and binary mixtures of dyes through magnetically retrievable Ca4Fe9O17 anchored on Biochar matrix

Synthesis of a Novel Porous Self‐Settling Magnetic Anion Exchange Resin and its Removal Mechanism for Tannic Acid

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