Characterization of Corn (Zea mays) Leaf Powder and Its Adsorption Properties Regarding Cu(II) and Cd(II) from Aqueous Samples

Silva, Adrielli Cristina Peres da; Jorgetto, Alexandre de Oliveira; Wondracek, Marcos Henrique Pereira; Saeki, Margarida Júri; Schneider, José Fabián; Pedrosa, Valber A.; Martines, Marco Antônio Utrera; Castro, Gustavo Rocha de

doi:10.15376/biores.10.1.1099-1114

Cited by 6 publications

(4 citation statements)

References 30 publications

(39 reference statements)

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“…Nuclear magnetic resonance (NMR) has been also used to characterize leaf-based adsorbents. Silva et al used NMR to characterize Zea mays leaf powder to adsorb pollutants from aqueous solutions [51]. In this work, it was exhibited the 13 C NMR spectra obtained through [ 1 H]-13 C cross-polarization technique (upper trace) and with direct polarization of 13 C (lower trace).…”

Section: Nuclear Magnetic Resonancementioning

confidence: 99%

The utilization of leaf-based adsorbents for dyes removal: A review

Bulgariu

Escudero

Bello

et al. 2019

Journal of Molecular Liquids

396

128

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The presence of organic dyes in the aquatic environment is a serious global problem because of the serious negative consequences on the quality of ecosystems. Among various physico-chemical methods, the adsorption could be considered a promising alternative for removing dyes from aqueous media, due to its efficiency, high selectivity, low cost, ease of operation, simplicity, and availability in a wide range of experimental conditions. However, all these advantages are closely related to the nature of adsorbent material used in the adsorption processes of dyes. The adsorbent materials available in large quantities requiring a simple preparation will enhance the benefits of the adsorption processes, in agreement with the concepts of green chemistry. This review is focused on the use of leaf-based materials, in raw or modified forms, as adsorbents for the removal of dyes from aqueous effluents, with applications in the wastewater treatment. This review addresses characterization of leaf-based adsorbents, possible utilization of leaf-based adsorbents (raw and activated forms) for dye removal and possible applications in pilot and full scale systems. Also, thermodynamics, equilibrium and kinetic parameters of dye adsorption on leaf-based adsorbents are discussed. The practical utility of leaf-based adsorbents for dye removal, and their possible uses in the treatment of industrial wastewater are copiously highlighted.

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Section: Nuclear Magnetic Resonancementioning

confidence: 99%

The utilization of leaf-based adsorbents for dyes removal: A review

Bulgariu

Escudero

Bello

et al. 2019

Journal of Molecular Liquids

396

128

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“…The observed resonances between 154.2 and 144.2 ppm may be related to the N=C-S groups found in thiamin [44]. The signal observed at 129.2 ppm is attributed to the presence of unsaturated aliphatic compounds (alkenes).…”

Section: Characterization Of the Materialsmentioning

confidence: 88%

“…Biomaterials have emerged as a compelling and cost-effective option for producing adsorbents to remediate wastewater [21,35]. Several biomaterials, such as banana peels [31], castor leaves [32], cassava root husks [35], sugarcane bagasse [36], orange peels [37], peanut shells [38], coconut fibers [39], pine bark [40], grass biomass [41], rice husk ash [42], green coconut shells [43], and corn leaves [44] have already been studied regarding their adsorption capacities, demonstrating their effective removal of metal species from aqueous solutions. In addition to their low cost and ease of preparation, some of these materials can be reused for several adsorption/desorption cycles [31,32,45].…”

Section: Introductionmentioning

confidence: 99%

Application of the Biomass of Leaves of Diospyros kaki L.f. (Ebenaceae) in the Removal of Metal Ions from Aqueous Media

Galera,

da Silva,

Jorgetto

et al. 2023

Separations

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Using straightforward and cost-effective methods, persimmon leaves were converted into high-quality powder. This powder was applied as an adsorbent for the removal of Cu(II) and Cd(II) from aqueous solutions. Scanning electron microscopy (SEM) revealed the presence of particles with non-homogeneous sizes and rough textures. The biosorbent exhibited a specific surface area of approximately 0.44 ± 0.015 m2 g−1. Elemental analysis and energy-dispersive X-ray spectroscopy (EDX) confirmed the presence of elements such as sulfur, phosphorus, nitrogen, and oxygen. The results of 13C nuclear magnetic resonance (13C-NMR), obtained using the cross-polarization technique, show the presence of groups containing sulfur and oxygen. Infrared spectroscopy (FTIR) indicated the existence of amine and hydroxyl groups. The material was used in the solid-phase extraction of Cu(II) and Cd(II) in batch experiments, and its adsorption capacity was evaluated as a function of time, pH, and analyte concentration. The fraction with a diameter between 63 and 106 μm was selected for the adsorption tests. Kinetic equilibrium was reached within 5 min, and the experimental data were fitted to the pseudo-second-order kinetic model. The optimum pH for the adsorption of both metal species was approximately 5.0. The adsorption isotherms were adjusted using the modified Langmuir equation, and the maximum amount of metal species extracted from the solution was determined to be 0.213 mmol g−1 for Cu(II) and 0.215 mmol g−1 for Cd(II), with high linear correlation coefficients for both metals. Persimmon leaves are typically abundant during the growing season, and because they are seasonal, the Diospyros kaki L.f. tree undergoes the natural process of leaf abscission, ensuring the availability of leaves for application.

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“…Considering this context, many materials have been developed in recent decades aiming at the removal/adsorption of metallic species from aqueous samples. Among these, synthetic materials (based on silica and cellulose) can be highlighted, which have been surface-modified to increase their efficiency and/or adsorption capacity [11,16], as well as natural materials or biosorbents [13,17,18]. The first type has advantages such as high adsorption capacity and the possibility of developing an adsorbent for a specific target.…”

Section: Introductionmentioning

confidence: 99%