Ultrafast and efficient removal of Pb(II) from acidic aqueous solution using a novel polyvinyl alcohol superabsorbent

Sun, Junhua; Sun, Guoxin; Zhao, Xiuxian; Zhao, Heng; Xu, Chengjin; Yan, Liangguo; Jiang, Xuchuan; Cui, Yu

doi:10.1016/j.chemosphere.2021.131032

Cited by 17 publications

(9 citation statements)

References 48 publications

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“…P–OH can completely ionize at pH = 3, while the amino groups undergo protonation. 44,48 In general, the adsorbent showed the best adsorption performance at pH = 4. Therefore, all relevant experiments in this work were carried out at pH = 4.…”

Section: Resultsmentioning

confidence: 95%

“…In our previous work, phosphate ester groups have been proved to be capable of removing Pb( ii ) from acidic wastewater. 44 In this work, polystyrene phosphate (PSP) resin was first designed by cross-linking reaction and used for the rapid removal of Pb( ii ) from acidic wastewater. The adsorbent was well characterized by FT-IR, SEM and EDS.…”

Section: Introductionmentioning

confidence: 99%

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Highly efficient and rapid Pb(ii) removal from acidic wastewater using superhydrophilic polystyrene phosphate resin

et al. 2022

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Highly efficient and rapid Pb(ii) removal from acidic wastewater using superhydrophilic polystyrene phosphate resin

et al. 2022

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“…The swelling rate of the adsorbent does not change much in the range of pH 5.0-11.0, and drops to 600.45% at pH 3.0. The decrease in the swelling rate is attributed to the protonation of the composite, which makes it difficult for the adsorbent to form hydrogen bonds with water molecules [36]. When the pH is 9.0, the swelling rate reaches 1239.31%.…”

Section: Characterization Results and Analysismentioning

confidence: 99%

Study on Preparation of Chitosan/Polyvinyl Alcohol Aerogel with Graphene−Intercalated Attapulgite(GO−ATP@CS−PVA) and Adsorption Properties of Crystal Violet Dye

Sun

Chen

2022

Nanomaterials

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Adsorption is one of the effective methods of treating dye wastewater. However, the selection of suitable adsorbent materials is the key to treating dye wastewater. In this paper, GO−ATP was prepared by an intercalation method by inserting graphene oxide (GO) into the interlayer of alabaster attapulgite (ATP), and GO−ATP@CS−PVA aerogel was prepared by co−blending−crosslinking with chitosan (CS) and polyvinyl alcohol (PVA) for the adsorption and removal of crystalline violet dye from the solution. The physicochemical properties of the materials are characterized by various methods. The results showed that the layer spacing of the GO−ATP increased from 1.063 nm to 1.185 nm for the ATP, and the specific surface area was 187.65 m2·g−1, which was 45.7% greater than that of the ATP. The FTIR results further confirmed the success of the GO−ATP intercalation modification. The thermogravimetric analysis (TGA) results show that the aerogel has good thermal stability properties. The results of static adsorption experiments show that at 302 K and pH 9.0, the adsorption capacity of the GO−ATP@CS−PVA aerogel is 136.06 mg·g−1. The mass of the aerogel after adsorption−solution equilibrium is 11.4 times that of the initial mass, with excellent adsorption capacity. The quasi−secondary kinetic, Freundlich, and Temkin isotherm models can better describe the adsorption process of the aerogel. The biobased composite aerogel GO−ATP@CS−PVA has good swelling properties, a large specific surface area, easy collection and a low preparation cost. The good network structure gives it unique resilience. The incorporation of clay as a nano−filler can also improve the mechanical properties of the composite aerogel.

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“…When the original dye solution concentrations were raised further, a saturation of adsorption occurred, and there were no more accessible active sites available for adsorption. The maximal adsorption capacities for MCCH (10,20,30,40,50 However, it was found that the maximum adsorption capacity of nonionic MCCH dropped when the initial concentration of MB was increased, but the maximum adsorption capacity of anionic Na-CMCH increased with increasing initial concentration of MB (Figure 9).…”

Section: Adsorption Studymentioning

confidence: 98%

“…In contrast, increasing the temperature reduces adsorption capacity, probably because the MB molecules are so active at high temperatures that they cannot remain on the adsorbent's surface. However, the adsorption capacity for nonionic MCCH decreased with increasing temperature from 298 K. Five MB concentrations (10,20,30,40, and 50 mg/L) were chosen to evaluate the influence of the original MB concentrations on the adsorption capacity of the MCC and Na-CMC hydrogel. Figure 8 shows that the adsorption rates for both hydrogels initially rapidly increased due to the number of readily accessible active sites, and they subsequently became much slower.…”

Section: Adsorption Studymentioning

confidence: 99%

Jute Stick-Derived Cellulose-Based Hydrogel: Synthesis, Characterization, and Methylene Blue Removal from Aqueous Solution

Ahmed,

Maniruzzaman,

Al-Mamun

et al. 2023

ACS Omega

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In this work, microcrystalline cellulose (MCC) was isolated from jute sticks and sodium carboxymethyl cellulose (Na-CMC) was synthesized from the isolated MCC. Na-CMC is an anionic derivative of microcrystalline cellulose. The microcrystalline cellulose-based hydrogel (MCCH) and Na-CMC-based hydrogel (Na-CMCH) were prepared by using epichlorohydrin (ECH) as a crosslinker by a chemical crosslinking method. The isolated MCC, synthesized Na-CMC, and corresponding hydrogels were characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electronic microscopy (SEM), and energy dispersive spectroscopy (EDS) for functional groups, crystallinity, surface morphology, and composite elemental composition, respectively. Pseudo-first-order, pseudo-second-order, and Elovich models were used to investigate the adsorption kinetics. The pseudo-second-order one is favorable for both hydrogels. Freundlich, Langmuir, and Temkin adsorption isotherm models were investigated. MCCH follows the Freundlich model ( R 2 = 0.9967), and Na-CMCH follows the Langmuir isotherm model ( R 2 = 0.9974). The methylene blue (MB) dye adsorption capacities of ionic (Na-CMCH) and nonionic (MCCH) hydrogels in different contact times (up to 600 min), initial concentrations (10–50 ppm), and temperatures (298–318 K) were investigated and compared. The maximum adsorption capacity of MCCH and Na-CMCH was 23.73 and 196.46 mg/g, respectively, and the removal efficiency of MB was determined to be 26.93% for MCCH and 58.73% for Na-CMCH. The Na-CMCH efficiently removed the MB from aqueous solutions as well as spiked industrial wastewater. The Na-CMCH also remarkably efficiently reduced priority metal ions from an industrial effluent. An effort has been made to utilize inexpensive, readily available, and environmentally friendly waste materials (jute sticks) to synthesize valuable adsorbent materials.

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Ultrafast and efficient removal of Pb(II) from acidic aqueous solution using a novel polyvinyl alcohol superabsorbent

Cited by 17 publications

References 48 publications

Highly efficient and rapid Pb(ii) removal from acidic wastewater using superhydrophilic polystyrene phosphate resin

Highly efficient and rapid Pb(ii) removal from acidic wastewater using superhydrophilic polystyrene phosphate resin

Study on Preparation of Chitosan/Polyvinyl Alcohol Aerogel with Graphene−Intercalated Attapulgite(GO−ATP@CS−PVA) and Adsorption Properties of Crystal Violet Dye

Jute Stick-Derived Cellulose-Based Hydrogel: Synthesis, Characterization, and Methylene Blue Removal from Aqueous Solution

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