Synthesis, characterization, and mercury removal application of surface modified kapok fibers with dopamine (DA): investigation of bidentate adsorption

Yang, Niannian; Shin, chul ho; Kim, Daeik; Park, Joonseok; Rao, Pinhua; Wang, Runkai

doi:10.1007/s12665-020-08980-x

Cited by 9 publications

(14 citation statements)

References 31 publications

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“…However, due to the abundance of hydroxyl found in KF, it was still able to capture metal ions on its surface. Adsorption using an untreated KF can be used as a basis to compare the adsorption performance of other treated and modified KF [56,70]. Fourier transform infrared (FTIR) results of raw KF show different functional groups that are present in the fiber.…”

Section: Adsorption Performance Of Raw Kfmentioning

confidence: 99%

“…KF and its composites can be used as an adsorption material for heavy metal ions and dyes in an aqueous solution with the right pre-treatment and surface modifications [33,43,59]. Some of the known applications include the sorption of oil from fibers [10,46], adsorption of heavy metal and dyes using KF [68,71], and the fabrication and modification of KF for the removal of heavy metal ions and dyes [1,8,52,56]. Pre-treatment of KF from previous studies includes acid/alkaline treatment [70], oxidation treatment [72], and Fenton reaction [73].…”

Section: Pre-treatments and Surface Modification Of Kapok Fibersmentioning

confidence: 99%

“…Song et al [ 49 ] reported that C 1s is also linked to C = C/C-C (284.31 eV) and C-O (285.13 eV) bonds. Apart from carbon and oxygen, Yang et al [ 56 ] and Cao et al [ 57 ] identified a soft peak (400 eV) between C 1s and O 1s as N (nitrogen) 1s. Given that adsorption is primarily based on the interaction between the adsorbate and binding sites found on the KF surface, XPS is a useful characterization approach.…”

Section: Kapok Fibersmentioning

confidence: 99%

“…The adsorption performance of raw kapok fibers for the removal of lead and mercury was examined and observed by Wang et al [ 70 ] and Yang et al [ 56 ]. The adsorption capacity of the untreated KF was found to be 4.70 mg/g and 39.9 mg/g for the removal of Pb and Hg, respectively.…”

Section: Kapok Fibersmentioning

confidence: 99%

Section: Kapok Fibersmentioning

confidence: 99%

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Modification Strategies of Kapok Fiber Composites and Its Application in the Adsorption of Heavy Metal Ions and Dyes from Aqueous Solutions: A Systematic Review

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Choi

Soriano

et al. 2022

IJERPH

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Kapok fiber (Ceiba pentandra) belongs to a group of natural fibers that are mainly composed of cellulose, lignin, pectin, and small traces of inorganic compounds. These fibers are lightweight with hollow tubular structure that is easy to process and abundant in nature. Currently, kapok fibers are used in industry as filling material for beddings, upholstery, soft toys, and nonwoven materials. However, kapok fiber has also a potential application in the adsorptive removal of heavy metal ions and dyes from aqueous systems. This study aims to provide a comprehensive review about the recent developments on kapok fiber composites including its chemical properties, wettability, and surface morphology. Effective and innovative kapok fiber composites are analyzed with the help of characterization tools such as scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, and Brunauer-Emmett-Teller analysis. Different pre-treatment methods such as alkali and acid pre-treatment, oxidation pre-treatment, and Fenton reaction are discussed. These techniques are applied to enhance the hydrophilicity and to generate rougher fiber surfaces. Moreover, surface modification and synthesis of kapok fiber-based composites and its environmental applications are examined. There are various methods in the fabrication of kapok fiber composites that include chemical modification and polymerization. These procedures allow the kapok fiber composites to have higher adsorption capacities for selective heavy metal and dye removal.

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Section: Adsorption Performance Of Raw Kfmentioning

confidence: 99%