Lignin extraction from barley straw using ultrasound-assisted treatment method for a lignin-based biocomposite preparation with remarkable adsorption capacity for heavy metal

Mohammadabadi, Siroos Iravani; Javanbakht, Vahid

doi:10.1016/j.ijbiomac.2020.07.074

Cited by 38 publications

(11 citation statements)

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“…The sodium alginate/lignin composite hydrogel beads were prepared as follows [ 5 , 6 ]: Firstly, an amount of lignin was dispersed into 50 mL of water under sonication. Then, 1.0 g of sodium alginate was added to the dispersion at 60 °C under stirring until complete dissolution (the weight percentage of lignin to sodium alginate was 0, 10, 20, 40, 80 wt%).…”

Section: Methodsmentioning

confidence: 99%

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Efficient Removal of Methylene Blue by Bio-Based Sodium Alginate/Lignin Composite Hydrogel Beads

et al. 2022

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Dye pollution is a serious issue in current environment protection, and bio-based adsorbents have been receiving much attention in wastewater treatment, due to their low cost, renewable, and environmentally friendly characteristics. Bio-based sodium alginate/lignin composite (SA/Lig) hydrogel beads were fabricated by a facile cross-linking with calcium ion and used for the removal of methylene blue (MB). The obtained SA/Lig microbeads were characterized with SEM, FTIR, and TG, and the effect of lignin content, pH, and temperature on the MB adsorption was investigated. The results indicated that the introduction of aromatic lignin can not only enhance thermal stability but also can improve the adsorption performance. Under optimal conditions, the maximum adsorption capacity (254.3 mg/g) was obtained for the SA/Lig-20% beads, with a removal efficiency of 84.8%. The adsorption process for MB is endothermic, and the rate-limiting step is chemical adsorption. The removal efficiency is higher than 90% after five cycles, revealing that the prepared beads show good regeneration ability.

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Section: Methodsmentioning

confidence: 99%

“…The treatment of MB in wastewater is an urgent issue, and many methods have been developed for the removal of MB. Compared with other methods, adsorption is superior in efficiency and economically [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Methylene Blue by Bio-Based Sodium Alginate/Lignin Composite Hydrogel Beads

et al. 2022

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“…Nevertheless, K Freundlich ((mg g −1 (mg L −1 ) −1/n )) predict a higher affinity of AC-Cr total adsorption: K Freundlich AC ð5:69Þ > K Freundlich CASS−BB ð2:68Þ > K Freundlich CASS−BA ð1:94Þ > K Freundlich CASS−BK ð1:90Þ. Similarly, in Cd 2+ and Pb 2+ adsorption studies, n Freundlich presented values within 1 and 10, and 1/n Freundlich between 0 and 1 (2:15 < n Freundlich < 4:71 ; 0:21 < 1/n Freundlich < 0:46), suggesting a favorable and cooperatively adsorption system [48][49][50].…”

Section: Equilibrium Studies and Side-by-side Comparison (Activated C...mentioning

confidence: 99%

Ecofriendly Biosorbents Produced from Cassava Solid Wastes: Sustainable Technology for the Removal of Cd²⁺, Pb²⁺, and Cr^total

Schwantes

Gonçalves

Perina

et al. 2022

Adsorption Science & Technology

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This research is aimed at investigating the possible use of cassava agroindustry solid wastes in manufacturing adsorbents and their use in removing heavy metals Cd2+, Pb2+, and Crtotal from water. Thus, a pilot study was conducted in two main steps: (1) obtaining and characterizing the adsorbents and (2) laboratory studies focused on the evaluation of critical physicochemical parameters on adsorption, such as pH of the solution containing heavy metals, the effect of adsorbent dose, besides kinetics and equilibrium adsorption and desorption studies. Three adsorbents were studied, cassava barks, bagasse, and their mixture. SEM, FTIR, pHPZC, acid digestion, and chemical composition analysis were employed for adsorbent characterization. The pH of the contaminated solution was evaluated within 4.0 to 7.0, while the adsorbent doses varied from 5.0 to 24.0 g L-1. The adsorption kinetics was evaluated within 5 to 180 minutes and interpreted using pseudofirst- and second-order models. Finally, equilibrium and desorption studies were performed by evaluating adsorbent performance within 5 to 200 mg L-1 of heavy metals, using several nonlinear models for results interpretation. SEM analysis reveals a heterogeneous structure full of cavities. FTIR before and after adsorption reveals gaps related to missing functional groups, suggesting a significant role of alkenes, carboxylic acid, alcohol, anhydride, and ether. pHPZC is found at pH 6.02, 6.04, and 6.26 for adsorbents derived from barks, bagasse, and their mixture. In low concentrations of metals, the higher adsorption capacities were found at pH 7.0 (94.9%) using 16 g L-1 of adsorbent, with the most cost-benefit dose found using 8.0 g L-1. The removal of metals reaches equilibrium within 5-10 minutes of contact time with pseudosecond-order best adjustments to the observed phenomena. The adsorption of metals by a cassava adsorbent is better adjusted to the Freundlich model, with significant and critical information provided by Sips, Redlich-Peterson, Temkin, Liu, and Khan models. Adsorption/desorption studies indicate that cassava adsorbent performs, on average, -10% of the adsorption of metals compared to activated carbon. Nevertheless, factors such as low cost and availability favor the use of such natural materials.

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“…For example, Santos et al showed polydispersity values of 6.73 for fractions of Eucalyptus kraft lignin obtained at pH 4.0 and Kim et al 1.41 for fractions of Miscanthus sacchariflorus organosolv lignin obtained at pH still alkaline, indicating that such factors can be attributed to extraction processes and botanical sources of lignin used. Still, in Wang’s et al study fractionation from steam-exploded lignin extracted from corn stalk showed a polydispersity of pH 5.3 fraction equal to 3.54, while fractions obtained from black liquor of Miscanthus sinensis at pH 5.4 polydispersity index of 1.62 in Toledano’s et al investigation, which reinforces the possibility that the origin of lignin or extraction processes are determining factors. ,,,,− ,,,− …”

Section: Lignin Fractionation Methodsmentioning

confidence: 84%

Lignin Fractionation Methods: Can Lignin Fractions Be Separated in a True Industrial Process?

Rodrigues

Lima

Araújo

et al. 2021

Ind. Eng. Chem. Res.

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Lignin is among one of the largest natural resources in the world, with aromatic structures that can serve as a raw material in the synthesis of high value-added chemicals, the production of bioenergy, and the development of carbon-based products, among others. A better understanding of the chemical structure of lignin and its valorization methods is necessary to overcome current technological challenges for industrial scale applications. The main challenge found to provide the most abundant source of aromatics in the world is the fractionation of lignin. Current studies propose a way to fractionate lignin to obtain more homogeneous and less complex fractions, because of the fact that aromatic compounds are essential intermediates in the manufacture of polymers, and lignin is the main source of biologically aromatic-based substrates. Numerous review articles have addressed research aimed at understanding the structure of lignin, however, a limited focus has been given to its fractionation methods. This article aims to review papers published in recent years using different lignin fractionation techniques, focusing on the four main types of fractionations: in organic solvents, gel permeation chromatography in preparatory scale, ultrafiltration and precipitation by varying acid gradient. This a Review summarizes the most recent innovations in the area of biorefineries for the chemical valorization of lignin derived from various botanical sources through different fractionation methods.

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Lignin extraction from barley straw using ultrasound-assisted treatment method for a lignin-based biocomposite preparation with remarkable adsorption capacity for heavy metal

Cited by 38 publications

References 84 publications

Efficient Removal of Methylene Blue by Bio-Based Sodium Alginate/Lignin Composite Hydrogel Beads

Efficient Removal of Methylene Blue by Bio-Based Sodium Alginate/Lignin Composite Hydrogel Beads

Ecofriendly Biosorbents Produced from Cassava Solid Wastes: Sustainable Technology for the Removal of Cd²⁺, Pb²⁺, and Cr^total

Lignin Fractionation Methods: Can Lignin Fractions Be Separated in a True Industrial Process?

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Lignin extraction from barley straw using ultrasound-assisted treatment method for a lignin-based biocomposite preparation with remarkable adsorption capacity for heavy metal

Cited by 38 publications

References 84 publications

Efficient Removal of Methylene Blue by Bio-Based Sodium Alginate/Lignin Composite Hydrogel Beads

Efficient Removal of Methylene Blue by Bio-Based Sodium Alginate/Lignin Composite Hydrogel Beads

Ecofriendly Biosorbents Produced from Cassava Solid Wastes: Sustainable Technology for the Removal of Cd2+, Pb2+, and Crtotal

Lignin Fractionation Methods: Can Lignin Fractions Be Separated in a True Industrial Process?

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Ecofriendly Biosorbents Produced from Cassava Solid Wastes: Sustainable Technology for the Removal of Cd²⁺, Pb²⁺, and Cr^total