Adsorption performance of Food Red 17 dye using an eco-friendly material based on Luffa cylindrica and chitosan

Schio, Rejiane da Rosa; Martinello, Kátia da Boit; Netto, Matias Schadeck; Silva, Luis; Mallmann, Evandro Stoffels; Dotto, Guilherme Luiz

doi:10.1016/j.molliq.2021.118144

Cited by 10 publications

(2 citation statements)

References 63 publications

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“…The results indicate that the crystal structure of the CDGBC did not change after Cr(VI) adsorption. Generally speaking, the disordered arrangement of amorphous materials is considered to be positive for the adsorption process [31].…”

Section: Xrd Analysismentioning

confidence: 99%

Efficient Removal of Cr(VI) by Protonated Amino-Bamboo Char Prepared via Radiation Grafting: Behavior and Mechanism

Zhao,

Gao,

Liang

et al. 2023

Sustainability

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Biochar is considered to be the most promising substrate for the preparation of environmentally functional materials. The modification of bamboo char can significantly improve the removal rate of toxic ions from wastewater; however, there are few reports that focus on the radiation grafting method. Here, glyceride methacrylate (GMA) is successfully grafted onto bamboo char through electron beam radiation, followed by amination using the existing epoxide group in diethyltriamine, and finally, treated with hydrochloric acid to obtain protonated diethyltriamine-functionalized bamboo char (CDGBC). The results of IR, TG, XRD, and SEM prove the successful fabrication of a CDGBC biosorbent. The results show that the solution pH has a great effect on the adsorption capacity, and a maximum adsorption capacity of 169.13 mg/g is obtained at pH = 2 for Cr(VI). In addition, the adsorption behavior of Cr(VI) onto CDGBC is demonstrated to obey the pseudo-second-order kinetic and Freundlich isotherm models, and thermodynamic analysis exhibits that Cr(VI) adsorption is an endothermic spontaneous process. A possible adsorption mechanism based on the electrostatic interaction, reduction, and surface complexation is proposed, according to the obtained results. This work confirms that radiation-induced grafting modification can effectively transform biochar into a high-performance adsorbent for Cr(VI) removal, offering a new approach to synthesizing an efficient biosorbent.

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Section: Xrd Analysismentioning

confidence: 99%

Efficient Removal of Cr(VI) by Protonated Amino-Bamboo Char Prepared via Radiation Grafting: Behavior and Mechanism

Zhao,

Gao,

Liang

et al. 2023

Sustainability

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“…It is worth noting that most pristine agricultural by-products suffer from low adsorption capacity and selectivity, which restricts their practical application in wastewater treatment. It is well acknowledged that chemical modification could introduce functional groups and active binding sites on the surface of agricultural by-products, thus a variety of chemical regents have been applied to improve adsorption capacity and selectivity, such as acids, bases, oxidants, inorganic salts, and organic reagents [ 9 , 10 , 28 , 29 , 30 , 31 ]. However, previous studies on kiwi-peel-based adsorbents for dye removal only involved modification of carbonization [ 25 ], polyacrylamide-grafting [ 26 ], and CTAB/H 2 O 2 [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Efficient and Selective Adsorption of Cationic Dye Malachite Green by Kiwi-Peel-Based Biosorbents

Zhao

Liu

et al. 2023

Molecules

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In this study, pristine kiwi peel (KP) and nitric acid modified kiwi peel (NA-KP) based adsorbents were prepared and evaluated for selective removal of cationic dye. The morphology and chemical structure of KP and NA-KP were fully characterized and compared, and results showed nitric acid modification introduced more functional groups. Moreover, the adsorption kinetics and isotherms of malachite green (MG) by KP and NA-KP were investigated and discussed. The results showed that the adsorption process of MG onto KP followed a pseudo-second-order kinetic model and the Langmuir isotherm model, while the adsorption process of MG onto NA-KP followed a pseudo-first-order kinetic model and the Freundlich isotherm model. Notably, the Langmuir maximum adsorption capacity of NA-KP was 580.61 mg g−1, which was superior to that of KP (297.15 mg g−1). Furthermore, thermodynamic studies demonstrated the feasible, spontaneous, and endothermic nature of the adsorption process of MG by NA-KP. Importantly, NA-KP showed superior selectivity to KP towards cationic dye MG against anionic dye methyl orange (MO). When the molar ratio of MG/MO was 1:1, the separation factor (αMG/MO) of NA-KP was 698.10, which was 5.93 times of KP. In addition, hydrogen bonding, π-π interactions, and electrostatic interaction played important roles during the MG adsorption process by NA-KP. This work provided a low-cost, eco-friendly, and efficient option for the selective removal of cationic dye from dyeing wastewater.

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Development of porous biodegradable sorbents for oil/water separation: a critical review

2022

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Adsorption performance of Food Red 17 dye using an eco-friendly material based on Luffa cylindrica and chitosan

Cited by 10 publications

References 63 publications

Efficient Removal of Cr(VI) by Protonated Amino-Bamboo Char Prepared via Radiation Grafting: Behavior and Mechanism

Efficient Removal of Cr(VI) by Protonated Amino-Bamboo Char Prepared via Radiation Grafting: Behavior and Mechanism

Efficient and Selective Adsorption of Cationic Dye Malachite Green by Kiwi-Peel-Based Biosorbents

Development of porous biodegradable sorbents for oil/water separation: a critical review

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