Use of Cellulosic Materials as Dye Adsorbents — A Prospective Study

Silva, Fabrícia C.; Lima, Luciano Clécio Brandão; Bezerra, Roosevelt D.S.; Osajima, Josy Anteveli; Filho, Edson Cavalcanti Silva

doi:10.5772/61343

Cited by 14 publications

(7 citation statements)

References 58 publications

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“…The increase of crystallite size led to recrystallization of the cellulose chains through hydrogen bonds 61 . Hydrogen bonds to cellulose occured through intramolecular and intermolecular bonds from the cellulose chain, and with the van der Waals bond, the cellulose structure arranged regularly to form a larger crystalline region 62 . Increased crystallite size and crystallinity degree lead to a decrease in chemical reactivity and water absorption ability 63 , however, it was able to improve physical mechanical properties such as stiffness and tensile strength of the cellulose structure 64 .…”

Section: Degree Of Crystallinitymentioning

confidence: 99%

Cellulose Production from Sago Frond with Alkaline Delignification and Bleaching on Various Types of Bleach Agents

Arnata¹,

Suprihatin²,

Fahma³

et al. 2019

Orient. J. Chem

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Sago frond is a lignocellulose waste that it has not been utilized optimally. The purpose of this study was to produce cellulose from sago frond with alkaline delignification and bleaching on various types of bleach agents. The study was conducted in three stages, namely a characterization of sago frond, alkaline delignification, and bleaching. Proximate analysis showed that sago fronds are potentially used as a cellulose source. The treatments of alkaline delignification and bleaching on various types of bleach agents significantly affected the characteristics of cellulose. The delignification using 10% NaOH for 2 h, after which the bleaching was carried out using the alkaline hydrogen peroxide for the same duration, thereby, producing cellulose of the highest degree of crystallinity and whiteness, while the hemicellulose and lignin contents were relatively low. Thus, sago frond has the potential to be used as a cellulose source and is widely applied.

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Section: Degree Of Crystallinitymentioning

confidence: 99%

Cellulose Production from Sago Frond with Alkaline Delignification and Bleaching on Various Types of Bleach Agents

Arnata¹,

Suprihatin²,

Fahma³

et al. 2019

Orient. J. Chem

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“…Figure 2b shows that WC presented a maximum adsorption peak of almost 40% for a dose of 35 mg and contaminant concentration of 40 mg/L. This low percentage of removal is due to the fact that the cellulose surface is anionic in nature thanks to the presence of OH-groups (29) . This behavior on the part of the raw biomass and cellulose evidences the need to treat the biomaterials in order to increase the adsorption sites of anionic contaminants.…”

Section: Figure 2 Adsorption Efficiency Of Tartrazine At Different Ad...mentioning

confidence: 98%

Effective adsorption of Tartrazine by modified biomaterial from wheat residues

Ortega-Toro

Tovar

Villabona-Ortíz

et al. 2021

inycomp

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The use of adsorbents from wheat residues (WR), wheat cellulose (WC) and wheat cellulose (MWC) treated with Cetyl trimethyl ammonium chloride (CTAC) was studied in the removal of tartrazine in an aqueous solution. The effect of adsorbent dose (15, 25 and 35 mg) and initial concentration (40, 70 and 100 mg/L) was evaluated. WC was obtained by double alkaline extraction, and the modification was performed with CTAC at 25 %w. Adsorption tests were performed following a multifactorial experimental design 33, placing 5 mL of solution in contact with the bioadsorbent for 24 h, at 30 °C and 250 rpm. UV-Vis determined the concentration of tartrazine at 500 nm. FTIR analysis showed that the prepared adsorbents present a diverse structure, with functional groups such as OH, carboxyl, amino and hydrocarbon compounds. Decreasing the adsorbent dose and increasing the initial concentration positively affect the removal efficiency, achieving the removal of 97.65 % with MWC. Adsorption kinetics showed that equilibrium was reached at 480 min when MWC and WC were used. The Freundlich model fitted the adsorption equilibrium data, showing that removal occurs in multilayers due to chemical interactions. CTAC-modified wheat cellulose is a good adsorbent for tartrazine in an aqueous solution.

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“…This carboxymethylated cellulose has been widely exploited for cationic dye removal. [21] Silva et al [22] reported a detailed review of cellulose-based dye adsorbents and discussed the modifications of cellulose with charged functionality to aid in dye adsorption.…”

Section: Introductionmentioning

confidence: 99%

Nano fibrillated cellulose‐based foam by Pickering emulsion: Preparation, characterizations, and application as dye adsorbent

Purkayastha

Ghosh

Saha

2021

Polymer Engineering & Sci

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An ecofriendly and biodegradable porous structure was prepared from drying aqueous foams based on nano fibrillated cellulose (NFC), extracted from softwood pulp by subcritical water/CO 2 treatment (SC-NFC). The primary aim of this work was to use the modified SC-NFC as stabilizer for a water-based Pickering emulsion which upon drying, yielded porous cellulosic materials, a good dye adsorbent. In order to exploit the carboxymethylated SC-NFC (CMSC-NFC, with a degree of substitution of 0.35 and a charge density of 649 μeqv/g) as a stabilizer for water-based Pickering emulsion in subsequent step, an optimized quantity of octyl amine (30 mg/g of SC-NFC) was added to make them partially hydrophobic. A series of dry foam structures were prepared by varying the concentrations of treated CMSC-NFCs and 4 wt% was found to be the optimum concentration to yield foam with high porosity (99%) and low density (0.038 g/cc) along with high compression strength (0.24 MPa), superior to the conventionally extracted NFC. The foams were applied to capture as high as 98% of methylene blue dyes, making them a potential green candidate for treating industrial effluent. In addition, the dye adsorption kinetics and isotherms were found to be well suited with second order kinetics and Langmuir isotherm models.

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Use of Cellulosic Materials as Dye Adsorbents — A Prospective Study

Cited by 14 publications

References 58 publications

Cellulose Production from Sago Frond with Alkaline Delignification and Bleaching on Various Types of Bleach Agents

Cellulose Production from Sago Frond with Alkaline Delignification and Bleaching on Various Types of Bleach Agents

Effective adsorption of Tartrazine by modified biomaterial from wheat residues

Nano fibrillated cellulose‐based foam by Pickering emulsion: Preparation, characterizations, and application as dye adsorbent

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