Toward 3D graphene oxide gels based adsorbents for high-efficient water treatment via the promotion of biopolymers

Cheng, Chong; Deng, Jie; Liu, Bei; He, Ai; Zhang, Xiang; Ma, Lang; Li, Shuang; Zhao, Changsheng

doi:10.1016/j.jhazmat.2013.09.065

Cited by 197 publications

(68 citation statements)

References 42 publications

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“…In another study, a hydrogel polymer of graphene oxide and chitosan, DNA, and protein was synthesized and used for the adsorption of different dyes and metal ions from aqueous solution. The synthesized hydrogels showed maximum adsorption capacities of 1100 and 1350 mg g −1 for methylene blue and methyl violet, respectively . In our recent work, we have used graft copolymers of gum ghatti with different vinyl monomers, such as AAM, AA, and AN, for the removal of different metal cations from wastewater.…”

Section: Applications Of Gum‐based Graft Copolymers As Adsorbentsmentioning

confidence: 99%

Recent Progress on the Design and Applications of Polysaccharide‐Based Graft Copolymer Hydrogels as Adsorbents for Wastewater Purification

Mittal

Ray

Okamoto

2016

Macro Materials & Eng

131

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Gum polysaccharides are one of the most abundant bio‐based polymers. They are generally derived from plants as exudates or from microorganisms and have diverse applications in many industries, especially in the food industries where they are used as emulsifiers and thickeners. In their natural form, gum polysaccharides have poor mechanical and physical properties; therefore, they are frequently modified with various synthetic monomers such as acrylamide and acrylic acid using graft copolymerization. Graft copolymerization is one of the most trusted and widely used synthetic methods for the modification of gum polysaccharides. Gum polysaccharides modified in this way have improved mechanical and physicochemical properties. Furthermore, gum polysaccharides contain a variety of functional groups, for example, carboxylic acid and hydroxyl groups; therefore, they have been used extensively as adsorbents for the removal of different impurities from wastewater such as toxic heavy metal cations and synthetic dyes. Here, the chemical and physical properties of gum polysaccharides, different methods of graft copolymerization, and the use of graft copolymer gum‐polysaccharide‐based hydrogels are reviewed in detail for the removal of toxic heavy metal cations and synthetic dyes from aqueous solutions.

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Section: Applications Of Gum‐based Graft Copolymers As Adsorbentsmentioning

confidence: 99%

Recent Progress on the Design and Applications of Polysaccharide‐Based Graft Copolymer Hydrogels as Adsorbents for Wastewater Purification

Mittal

Ray

Okamoto

2016

Macro Materials & Eng

131

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“…Besides using the pseudo-rst-order and the pseudo-second-order equations to identify the adsorption process, considering that they could not identify the diffusion mechanism, the intraparticle diffusion model was used. 51,52 The intraparticle diffusion equation can be written in the following form:…”

Section: Adsorption Kinetics Study Of Paa2/go Composite Hydrogelmentioning

confidence: 99%

Graphene oxide interpenetrated polymeric composite hydrogels as highly effective adsorbents for water treatment

Cheng

Liu

et al. 2014

RSC Adv.

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Recent studies showed that polymeric hydrogels presented promising applications in adsorption to various water contaminants. However, the usages of these synthetic hydrogels are hindered by several inherent shortages, e.g. limited inner porosity, low adsorption capacity and long equilibrium time. In this study, synthetic GO interpenetrated poly(acrylic acid) (PAA) hydrogels as 3D highly-efficient adsorbents were prepared and systematically studied for the first time. The mediating ability of GO on the inner structure and adsorption capacities is examined using two types of PAA hydrogels (PAA1 and PAA2 with different inner structures, prepared by in situ cross-linked polymerization of monomer AA). The results indicated that the prepared PAA2/GO hydrogels exhibited a well-defined and interconnected 3D porous network, which allowed the adsorbate molecules to diffuse easily into the absorbent. The adsorption experiments indicated that the obtained interconnected polymeric composite hydrogels could efficiently remove cationic dyes and heavy metal ions from wastewater; the highest adsorption capacity of the prepared PAA2/GO composite hydrogels could reach as high as 1600 mg g À1 , which is highly promising in the treatment of environmental toxins. Moreover, the initial concentration, pH value, desorption ratio, dynamic kinetics and isotherms of the methylene blue (MB) adsorption processes of the prepared PAA2/ GO composite hydrogels were also studied in detail. The experimental data of MB adsorption fitted the pseudo-second-order kinetic model and the Langmuir isotherm very well, and the adsorption process was controlled by the intraparticle diffusion. Moreover, due to its facile preparation and low-cost, the GO interpenetrated PAA composite hydrogels may function as promising adsorbents for wastewater treatment, and this method might also be extended to improve the adsorption capacity of other polymeric hydrogels.

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“…Moreover, gels can be prepared in large scale by means of a facile gelation process in a short time. Therefore, it is reasonable to predict that the biopolymer-mediated graphite oxide (GO) gels may function as porous adsorbents with satisfactory adsorption capacity and limited toxicity for an application in wastewater treatment [9].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…Xu et al [11] reported a strategy for 3D self-assembly of graphene oxide sheets and DNA to form multifunctional hydrogels that possessed high mechanical strength, environmental stability, and dye-loading capacity. Cheng et al [9] prepared three typical GO-biopolymer gels (bovine serum albumin, chitosan, and doublestranded DNA) for the first time and investigated the adsorption capabilities of dyes and heavy metals. The GO-biopolymer gels displayed an adsorption capacity as high as 1,100 mg/g for methylene blue dye and 1,350 mg/g for methyl violet dye, respectively.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Facile synthesis of three-dimensional graphene–soy protein aerogel composites for tetracycline adsorption

Zhuang

et al. 2016

Desalination and Water Treatment

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A three-dimensional graphene-soy protein aerogel was prepared and characterized by scanning electron microscopy, Raman, and fourier transform infrared spectroscopy. Both the graphene aerogel (GS0) and the graphene-soy protein aerogel (GS6) were used as adsorbents for the removal of tetracycline from an aqueous solution. The kinetics model (pseudo-first-order, pseudo-second-order, and intraparticle diffusion model), isotherm model (Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich), and pH influences were investigated to characterize the adsorption behaviors. The Langmuir and the pseudosecond-order were best fitted for both GS0 and GS6. Calculated from the Langmuir model, the maximum adsorption capacity of GS0 was 137.0 mg/g, while GS6 was 164.0 mg/g. Graphene was decorated by low-cost and nontoxic protein with enhanced adsorption performance and low biotoxictiy. Therefore, GS6 is a promising adsorbent material for the preconcentration and separation of antibiotics for environmental remediation.

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Toward 3D graphene oxide gels based adsorbents for high-efficient water treatment via the promotion of biopolymers

Cited by 197 publications

References 42 publications

Recent Progress on the Design and Applications of Polysaccharide‐Based Graft Copolymer Hydrogels as Adsorbents for Wastewater Purification

Recent Progress on the Design and Applications of Polysaccharide‐Based Graft Copolymer Hydrogels as Adsorbents for Wastewater Purification

Graphene oxide interpenetrated polymeric composite hydrogels as highly effective adsorbents for water treatment

Facile synthesis of three-dimensional graphene–soy protein aerogel composites for tetracycline adsorption

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