Caffeine removal from synthetic wastewater using magnetic fruit peel composites: Material characterization, isotherm and kinetic studies

Almeida‐Naranjo, Cristina E.; Aldás, María Belén; Cabrera, Génesis; Guerrero, V.H.

doi:10.1016/j.envc.2021.100343

Cited by 23 publications

(13 citation statements)

References 41 publications

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“…In the third model considered, the rate-controlling step is the intraparticle diffusion of the pollutant into the pores of the adsorbent. This model is usually adequate for porous adsorbents [25,26].…”

Section: Adsorption Studiesmentioning

confidence: 99%

Magnetite Impregnated Lignocellulosic Biomass for Zn(II) Removal

et al. 2022

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Magnetic composites obtained by impregnation of lignocellulosic biomass with magnetite nanoparticles were used for zinc(II) removal from aqueous synthetic solutions. Laurel, canelo and eucalyptus sawdust, with a particle size between 74 and 150 µm were used as support. Structural and morphological examinations of the composites confirmed the presence of magnetite nanoparticles in the lignocellulosic support. Transmission Electron Microscopy showed nanoparticles with diameters of about 20 nm. The maximum removal efficiencies for 7 g L−1 of modified adsorbent were increased to 98.9, 98.8 and 97.6% for laurel, canelo and eucalyptus magnetic composites, respectively, in comparison to 60.9, 46.0 and 33.3%, for corresponding unmodified adsorbents. Adsorption data was analyzed using pseudo-first, pseudo-second order and intra-particle diffusion kinetic models and various isotherm models. The results determined that Freundlich isotherm fits the Zn ions adsorption on magnetite modified adsorbents while chemisorption and boundary diffusion were dominating the process.

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Section: Adsorption Studiesmentioning

confidence: 99%

Magnetite Impregnated Lignocellulosic Biomass for Zn(II) Removal

et al. 2022

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“…A UV-Visible spectrophotometer (Systronics) was used to measure the absorption of sunset yellow dye (λmax=482 nm). The pH of the aqueous solutions was determined using a Labman model pH metre with a glass electrode [Ahmad et al, 2021;Almeida-Naranjo et al, 2021].…”

Section: Characterization Of Prepared Adsorbentmentioning

confidence: 99%

Adsorption isotherm and kinetic studies for the decolorization of sunset yellow FCF dye using economically feasible low cost adsorbent

2022

Global NEST: The International Journal

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<p>The present communication attempts to explore the adsorption potential of Mixed Fruit Peel Waste (MFPW) to remove Sunset Yellow FCF dye from an aqueous solution. The MFPW is a low-cost adsorbent prepared from the peels orange, watermelon and banana. The characterization of MFPW was made through FTIR, SEM and BET studies. The FTIR studies revealed the presence of functional groups such as nitro, carboxyl, ester, ether, phenol and alkyne that are solely responsible for adsorption. The surface morphology exposed the clear and well-developed pores of MFPW. Batch adsorption studies resulted in a maximum adsorption capacity (qmax) of 200 mg/g at optimum pH 3.0, contact time of 100 minutes, and adsorbent dose of 2.0 g/L with an initial dye concentration of 40 ppm. Sunset Yellow FCF dye removal was discovered to be spontaneous and endothermic in nature, with the Langmuir isotherm and pseudo-second-order-kinetics providing the best fit. In summary, mixed fruit peel waste adsorbent can be used as a low-cost, environmentally friendly and sustainable adsorbent to decolorize sunset yellow FCF dye.</p>

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“…Parallel with the sustainability offered by the valorization of agro-wastes, functionalization of the biochar with magnetite (Fe 3 O 4 ) nanoparticles is a plus. Magnetic nanosorbents possess high surface area and could be used on a large scale to treat large volumes of water thanks to the feasibility of their separation using a low-strength external magnetic field [32][33][34][35][36]. In the current investigation, biochar of orange peels (OPBC) and the magnetite-loaded biochar (MAG-OPBC) will be synthesized and exploited for the removal of DNB from synthetic wastewater.…”

Section: Introductionmentioning

confidence: 99%

Performance of Pristine versus Magnetized Orange Peels Biochar Adapted to Adsorptive Removal of Daunorubicin: Eco-Structuring, Kinetics and Equilibrium Studies

et al. 2023

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Drugs and pharmaceuticals are an emergent class of aquatic contaminants. The existence of these pollutants in aquatic bodies is currently raising escalating concerns because of their negative impact on the ecosystem. This study investigated the efficacy of two sorbents derived from orange peels (OP) biochar (OPBC) for the removal of the antineoplastic drug daunorubicin (DNB) from pharmaceutical wastewater. The adsorbents included pristine (OPBC) and magnetite (Fe3O4)-impregnated (MAG-OPBC) biochars. Waste-derived materials offer a sustainable and cost-effective solution to wastewater bioremediation. The results showed that impregnation with Fe3O4 altered the crystallization degree and increased the surface area from 6.99 m2/g in OPBC to 60.76 m2/g in the case of MAG-OPBC. Placket–Burman Design (PBD) was employed to conduct batch adsorption experiments. The removal efficiency of MAG-OPBC (98.51%) was higher compared to OPBC (86.46%). DNB adsorption onto OPBC followed the D–R isotherm, compared to the Langmuir isotherm in the case of MAG-OPBC. The maximum adsorption capacity (qmax) was 172.43 mg/g for MAG-OPBC and 83.75 mg/g for OPBC. The adsorption kinetics for both sorbents fitted well with the pseudo-second-order (PSO) model. The results indicate that MAG-OPBC is a promising adsorbent for treating pharmaceutical wastewater.

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Caffeine removal from synthetic wastewater using magnetic fruit peel composites: Material characterization, isotherm and kinetic studies

Cited by 23 publications

References 41 publications

Magnetite Impregnated Lignocellulosic Biomass for Zn(II) Removal

Magnetite Impregnated Lignocellulosic Biomass for Zn(II) Removal

Adsorption isotherm and kinetic studies for the decolorization of sunset yellow FCF dye using economically feasible low cost adsorbent

Performance of Pristine versus Magnetized Orange Peels Biochar Adapted to Adsorptive Removal of Daunorubicin: Eco-Structuring, Kinetics and Equilibrium Studies

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