Adsorption of lead ions using a modified lignin hydrogel

Qingxin, Yao; Xie, Jimin; Liu, Junxia; Kang, Hongzhang; Liu, Yuan

doi:10.1007/s10965-014-0465-9

Cited by 103 publications

(27 citation statements)

References 51 publications

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“…[23][24][25] Lignin derivatives can introduce numerous oxygen contained groups as adsorbing sites, such as hydroxyl, carbonyl, methoxyl and carboxyl groups, which suggests it being a good candidate as low cost metal adsorbent. 32,33 As a result, lignin-based adsorbents often suffer from low adsorption capacities, mostly less than 200 mg g -1 . 32,33 As a result, lignin-based adsorbents often suffer from low adsorption capacities, mostly less than 200 mg g -1 .…”

Section: Introductionmentioning

confidence: 92%

A lignosulfonate-modified graphene hydrogel with ultrahigh adsorption capacity for Pb(ii) removal

et al. 2016

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Lignosulfonate-modified graphene hydrogel (LS-GH) for Pb(II)adsorption was synthesized through a one-step method. The three-dimensional (3D) porous architecture of graphene hydrogel was functionalized by lignosulfonate with diverse oxygen contained groups. Benefiting from large specific surface area, multiple porosity and sufficient active sites, the LS-GH adsorbent exhibited ultrahigh adsorption capacity (1210 mg g -1 ) for Pb(II) removal, which was among the highest in previous reported Pb(II) adsorbents. Importantly, the free-standing and flexible LS-GH can be used as a column-packed device, providing an efficient pathway for fast removal of Pb(II) with ultrahigh adsorption capacity of 1308 mg g -1 within 40 min. The LS-GH adsorbent is high capacitive, low cost, eco-friendly and recyclable, which could be an attractive adsorbent for the purification of wastewater in a large scale.

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Section: Introductionmentioning

confidence: 92%

A lignosulfonate-modified graphene hydrogel with ultrahigh adsorption capacity for Pb(ii) removal

et al. 2016

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“…Excessive levels of heavy metals in water are an environmental hazard because of their toxicity, accumulation in the food chain and persistence in nature [1][2][3]. Water contamination by heavy metals such as Cr, Cd, Hg, Cu, Ni, As and Pb, is a big environmental concern and it requires significant attention [4][5][6][7][8]. The major sources of heavy metal pollution are municipal waste, metal plating facilities, mining operations, fertilizer industries, tanneries, batteries and paper industries [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…A lot of research works have been conducted on different types of adsorbents, such as those of mineral, organic or biological origin, magnetic nanoparticles [26,27], nanosheet-structured materials [28], zeolites [29], industrial by-products [30], agricultural wastes [31,31], biomass [33] and lignin and lignocellulose materials [8,34,35]. However, wastewater treatment technologies are still requiring new environmentally friendly, scalable, cheap and effective materials.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Pb(II) ions from aqueous solution using lignin from Hagenia abyssinica

Tesfaw¹,

Chekol²,

Mehretie³

et al. 2017

Bull. Chem. Soc. Eth.

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ABSTRACT. The adsorption of lead(II) ions from aqueous solution onto alkali lignin extracted from Hagenia abyssinica was investigated by electrochemical methods. The effect of solution pH, lignin dosage and contact time were investigated at room temperature in a batch system. Adsorption equilibrium was approached within 80 min. The adsorption kinetics data were described by pseudo-second-order kinetics model, while the equilibrium data were well fitted using the Freundlich model. A maximum adsorption capacity was found to be 80.41 mg g -1 of the dry weight of lignin.

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“…During the process of adsorption the heavy metal ions could interpenetrate into the network of the hydrogel with water quickly and bind to the hydrophilic functional groups in hydrogel, such as -COOH, −NH 2 , and -OH. Consequently, the hydrogel adsorbents have been endowed with very high adsorption capacities and have great potentials to adsorb heavy metal ions from wastewater in practical application [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Preparation of polyvinyl alcohol/chitosan hydrogel compounded with graphene oxide to enhance the adsorption properties for Cu(II) in aqueous solution

Wang

et al. 2015

J Polym Res

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A novel bio-adsorbent, composite hydrogel beads, composed of polyvinyl alcohol (PVA), chitosan (CS) and graphene oxide (GO) was prepared by an instantaneous gelation method. The micromorphology and thermal stability of the PVA/CS/GO hydrogel beads were characterized by scanning electronic microscope (SEM) and thermo gravimetric analysis (TGA) respectively. Adsorption of Cu(II) onto PVA/CS/GO hydrogel beads was investigated with respect to pH, initial concentration, temperature and adsorption time. Adsorption data were well matched by Langmuir isotherm and pseudo-second-order kinetic model at the optimum pH 5.5. The maximum adsorption capacities of PVA/CS/GO hydrogel beads were found to be 162 mg g −1 for Cu(II) at 30°C, which was much higher than that of PVA/CS hydrogel. Thermodynamic studies indicated that the adsorption was spontaneous and endothermic process in nature. Besides, desorption efficiency and reusability of the adsorbents were assessed on basis of six consecutive adsorption-desorption cycles. Based on these studies, it can be seen that PVA/CS/ GO hydrogel beads will be a potential recyclable adsorbent for removal of hazardous metal ions in waste water.

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Adsorption of lead ions using a modified lignin hydrogel

Cited by 103 publications

References 51 publications

A lignosulfonate-modified graphene hydrogel with ultrahigh adsorption capacity for Pb(ii) removal

A lignosulfonate-modified graphene hydrogel with ultrahigh adsorption capacity for Pb(ii) removal

Adsorption of Pb(II) ions from aqueous solution using lignin from Hagenia abyssinica

Preparation of polyvinyl alcohol/chitosan hydrogel compounded with graphene oxide to enhance the adsorption properties for Cu(II) in aqueous solution

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