Preparation of a double-network hydrogel based on wastepaper and its application in the treatment of wastewater containing copper(<scp>ii</scp>) and methylene blue

Chen, Yaoning; Li, Linshenzhang; Li, Yuanping; Liu, Yihuan; Chen, Yanrong; Li, Hui; Li, Meiling; Xu, Fangting; Liu, Yuqing

doi:10.1039/d1ra02321g

Cited by 19 publications

(11 citation statements)

References 67 publications

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“…Meanwhile, H + will form competitive adsorption with MB, reducing the adsorption quantity. Under strong alkaline conditions, the charge screening effect of Na + (from NaOH) will affect the adsorption capacity 44 . Above all, pH = 6 is selected for subsequent adsorption performance experiments.…”

Section: Resultsmentioning

confidence: 99%

Hydrogel‐biochar composites for removal of methylene blue: Adsorption performance, characterization, and adsorption isotherm, kinetics, thermodynamics analysis

Wang¹,

Zheng²,

Zong³

et al. 2022

J of Applied Polymer Sci

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Low‐concentration organic dye wastewater severely threatens the growth and reproduction of animals and plants, as well as the survival and development of human beings and the environment. Although versatile hydrogel composites have been prepared owing to their excellent adsorption performance, the high‐removal efficiency and fast adsorption rate are still two crucial problems related to practical applications. Herein, xanthan gum‐g‐poly (acrylic acid‐co‐acrylamide)/biochar composite hydrogels with high‐removal efficiency and fast adsorption rate of methylene blue (MB) are synthesized using sodium dodecyl sulfate as a pore‐foaming agent. The composite hydrogels exhibit rough and porous three‐dimensional structures, which can make the internal active adsorption sites to be fully exposed and facilitate the MB diffusion process. MB's removal efficiency can reach 96.64% within 30 minutes, which is almost the first time that a biochar‐contained hydrogel could show superior removal efficiency of more than 95% in such a short adsorption time. The factors affecting the adsorption performance are studied comprehensively. Langmuir and pseudo‐second‐order models fit the adsorption process well. Moreover, the MB removal rate still exceeds 80% after eight cycles, which is also a vital indicator for practical treatment. Adsorption mechanism analysis shows that the synergistic effect among biochar, xanthan gum, and polymer chains and the porous structure improve the adsorption performance of the composite hydrogels. The proposed hydrogel‐biochar composites with high‐removal efficiency and adsorption rate are highly promising as an alternative adsorbent for advanced printing and dyeing wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Hydrogel‐biochar composites for removal of methylene blue: Adsorption performance, characterization, and adsorption isotherm, kinetics, thermodynamics analysis

Wang¹,

Zheng²,

Zong³

et al. 2022

J of Applied Polymer Sci

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“…Here, 99.5% efficiency was displayed by cellulose nanifibrils. 151 No change in reusability efficiency of cellulose hydrogel for Cu 2+ adsorption was observed by Chen et al 193 up to six cycles. Liu et al 233 investigated reusability of cellulose beads for Cu 2+ adsorption up to 30 cycles with an efficiency of 92%.…”

Section: Regenerationmentioning

confidence: 91%

“…The high density of metal-binding groups on the hydrogel enhanced adsorption of Pb 2+ ions (294.11 mg g –1 ) compared to solely acrylamide linked carboxymethyl cellulose hydrogel. Some research groups have developed adsorbent material from waste paper for water purification. , To explore the metal adsorption efficiency of waste paper, Chen et al synthesized a double network hydrogel from waste paper. The authors heated cross-linked networks of waste paper and cellulose at 60 °C for 2 h to obtain 1 mm thick hydrogel.…”

Section: Modifications In Cellulosementioning

confidence: 99%

“…Some research groups have developed adsorbent material from waste paper for water purification. 191,192 To explore the metal adsorption efficiency of waste paper, Chen et al 193 synthesized a double network hydrogel from waste paper. The authors heated cross-linked networks of waste paper and cellulose at 60 °C for 2 h to obtain 1 mm thick hydrogel.…”

Section: Modifications In Cellulosementioning

confidence: 99%

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Critical Review of Bioadsorption on Modified Cellulose and Removal of Divalent Heavy Metals (Cd, Pb, and Cu)

Kaur

Sengupta

Mukhopadhyay³

2022

Ind. Eng. Chem. Res.

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Heavy metal contamination in soil and water has become a serious threat to all forms of life. Finding a sustainable remediation method is the prime concern of researchers worldwide. In this quest, cellulose has emerged as a biocompatible, biodegradable, renewable, tunable, and cost-effective bioadsorbent for heavy metal removal from polluted water. Cellulose is rich in hydroxyl groups which can be chemically modified to enhance the reactivity, binding sites, and mechanical strength. Cellulose in nano size, i.e., nanofibers and nanocrystals, offer myriad opportunities to improve the aspect ratio, surface area, pore size, and hydrophilicity for effective adsorption. In this review, chemical and physical modifications in cellulose (functional group transformations, nanocellulose, nanocomposites, hydrogels, aerogels, beads, and membranes) with respect to adsorption of divalent heavy metal ions, in particular, Pb 2+ , Cu 2+ , and Cd 2+ , have been extensively discussed. This review also examines the effect of pH, concentration, temperature, and contact time on the adsorption process. Different mechanisms for heavy metal removal such as ion exchange, electrostatic interactions, complexation, chelation, precipitation, and reduction have been discussed. Theoretical insights into the mechanisms of adsorbent−adsorbate binding are critically examined in the context of modified cellulose. The authors, in the concluding section, summarize potential research directions toward developing sustainable biosorbents.

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“…Among the swelling abilities calculated by Formula (1), the highest result (66.75 g/g) was reported for a composite hydrogel produced from waste paper and acrylamide in NaOH/urea aqueous system with the cross-linker ECH [ 87 ]. An identical dissolving system was applied for waste paper, but the swelling abilities of the hydrogels without acrylamide in the composition of the hydrogel obviously fell drastically to 13.4–27.7 g/g compared with the previous example [ 88 ].…”

Section: Physical Propertiesmentioning

confidence: 99%

Cellulose-Based Metallogels—Part 2: Physico-Chemical Properties and Biological Stability

Mikhailidi,

Volf,

Belosinschi

et al. 2023

Gels

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Metallogels represent a class of composite materials in which a metal can be a part of the gel network as a coordinated ion, act as a cross-linker, or be incorporated as metal nanoparticles in the gel matrix. Cellulose is a natural polymer that has a set of beneficial ecological, economic, and other properties that make it sustainable: wide availability, renewability of raw materials, low-cost, biocompatibility, and biodegradability. That is why metallogels based on cellulose hydrogels and additionally enriched with new properties delivered by metals offer exciting opportunities for advanced biomaterials. Cellulosic metallogels can be either transparent or opaque, which is determined by the nature of the raw materials for the hydrogel and the metal content in the metallogel. They also exhibit a variety of colors depending on the type of metal or its compounds. Due to the introduction of metals, the mechanical strength, thermal stability, and swelling ability of cellulosic materials are improved; however, in certain conditions, metal nanoparticles can deteriorate these characteristics. The embedding of metal into the hydrogel generally does not alter the supramolecular structure of the cellulose matrix, but the crystallinity index changes after decoration with metal particles. Metallogels containing silver (0), gold (0), and Zn(II) reveal antimicrobial and antiviral properties; in some cases, promotion of cell activity and proliferation are reported. The pore system of cellulose-based metallogels allows for a prolonged biocidal effect. Thus, the incorporation of metals into cellulose-based gels introduces unique properties and functionalities of this material.

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Preparation of a double-network hydrogel based on wastepaper and its application in the treatment of wastewater containing copper(ii) and methylene blue

Abstract: In this research, wastepaper was innovatively compounded with acrylamide to prepare a wastepaper/acrylamide double-network hydrogel and was applied to the treatment of the mixed wastewater containing copper(ii) and methylene blue.

Cited by 19 publications

References 67 publications

Hydrogel‐biochar composites for removal of methylene blue: Adsorption performance, characterization, and adsorption isotherm, kinetics, thermodynamics analysis

Hydrogel‐biochar composites for removal of methylene blue: Adsorption performance, characterization, and adsorption isotherm, kinetics, thermodynamics analysis

Critical Review of Bioadsorption on Modified Cellulose and Removal of Divalent Heavy Metals (Cd, Pb, and Cu)

Cellulose-Based Metallogels—Part 2: Physico-Chemical Properties and Biological Stability

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