Magnetic zeolite-natural polymer composite for adsorption of chromium (VI)

Gaffer, Amany; Kahlawy, Amal A. Al; Aman, Delvin

doi:10.1016/j.ejpe.2016.12.001

Cited by 61 publications

(28 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Among these technologies, the adsorption process is attractive because of its low cost and high efficiency. Widely used adsorbents include carbonaceous materials, clays, zeolites, composite materials, biomass, nanomaterials, and polymeric materials [ 6 , 7 , 8 ]. The efficiency of adsorbents depends on their specific surface areas and their chemical stabilities [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Magnetic sorbents could be easily separated by an external magnetic field from the liquid phase, which would assist in removing organic and inorganic pollutants using these materials [ 10 ]. The adsorptive removal of heavy metals, including those in aqueous solutions, by magnetic nanoparticles has been reported [ 8 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of Cu(II) and Zn(II) Ions from Aqueous Solution by Gel/PVA-Modified Super-Paramagnetic Iron Oxide Nanoparticles

Anudari

Yin

et al. 2018

Molecules

View full text Add to dashboard Cite

Super-paramagnetic iron oxide nanoparticles (SPIONs)/gelatin (gel)/polyvinyl alcohol (PVA) nanoparticles were designed and synthesized by the co-precipitation method and further modified with gel and PVA. These nanoparticles were used for the removal of Cu(II) and Zn(II) from aqueous solutions. The adsorbents were rich in different functional groups for chemisorption and showed effective adsorption properties. The adsorption of Cu(II) and Zn(II) on the SPIONs/gel and SPIONs/gel/PVA materials were investigated with respect to pH, adsorption kinetics, and adsorption isotherms. The adsorption data was fitted to the Langmuir, Freundlich, and Sips models at the optimum pH 5.2 (±0.2) over 60 min; SPIONs/gel showed maximum adsorption capacities of 47.594 mg/g and 40.559 mg/g for Cu(II) and Zn(II); SPIONs/gel/PVA showed those of 56.051 mg/g and 40.865 mg/g, respectively. The experimental data fitted the pseudo-second-order model, indicating that the process followed chemical monolayer adsorption. In addition, the SPIONs/gel/PVA showed better stability and Cu(II) adsorption efficiency than SPIONs/gel.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of Cu(II) and Zn(II) Ions from Aqueous Solution by Gel/PVA-Modified Super-Paramagnetic Iron Oxide Nanoparticles

Anudari

Yin

et al. 2018

Molecules

View full text Add to dashboard Cite

show abstract

“…Recently, due to the heavy metal pollutants are released into environment without restraint, the concentration of heavy metal pollutants has increased sharply by years. Heavy metal ions equipped with the character of high toxicity and enrichment that would threaten not only human-beings and animals but also the whole biogeocenose badly [3][4][5][6][7]. In summary, disposing the heavy metals waste water reasonably is an urgent solution.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of magnetic zeolite P from fly ash and its properties

Wang

Sun

Zhang

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

Magnetic zeolite P with the spherical form was successfully synthesized from low-grade fly ash via hydrothermal synthesis method. These samples were characterized by XRD, XRF, FTIR, BET, VSM, SEM and TEM. The textural properties of magnetic zeolite P were further studied by N 2 adsorptiondesorption technique. In addition, the vibrating sample magnetometer study confirmed that the saturation magnetization is 11.99 emu·g −1 , indicating that magnetic zeolite P has sufficiently magnetic property to be attracted by a permanent magnet. Moreover, this facile approach to study saturation adsorption capacity and percentage removal of the magnetic zeolite P for Pb (II) and Cu (II) ions might expand the application of magnetic zeolite P in the adsorption of heavy metal ions, and it may be further extended to other magnetic zeolite materials.

show abstract

“…Chromium is one of such heavy metals. Its presence in water originates from some anthropogenic source including industrial activities such as dyeing, electroplating, textile processing, alloying, and fertilizer production [2][3][4]. Chromium in aqueous solution exists in two oxidation states, trivalent state [Cr(III)] and hexavalent state [Cr (VI)].…”

Section: Introductionmentioning

confidence: 99%

Grewia spp. Biopolymer as Low-Cost Biosorbent for Hexavalent Chromium Removal

Kofa

Ndongo

Ngounou

et al. 2019

Journal of Chemistry

View full text Add to dashboard Cite

In this study, Grewia spp. biopolymer was utilized as a biosorbent for elimination of hexavalent chromium from water. Fourier-transform infrared spectrometry (FTIR) and X-ray diffraction (XRD) were performed for characterization of the biosorbent. Experiments were conducted in a batch mode at room temperature (25 ± 2°C) and agitation speed of 100 rpm to determine the influence of biosorbent dose, contact time, Cr(VI) concentration, and initial solution pH. It was found that equilibrium was attained in 50 min. A pseudo-first-order model suited well than a pseudo-second-order model. Biosorption capacity of Grewia spp. biopolymer increased with increase in concentration and depended on the solution pH. Langmuir and Freundlich models described experimental data very well. These findings showed that Grewia spp. biopolymer can serve as a biosorbent for elimination of Cr(VI) from water.

show abstract

Magnetic zeolite-natural polymer composite for adsorption of chromium (VI)

Cited by 61 publications

References 27 publications

Adsorption of Cu(II) and Zn(II) Ions from Aqueous Solution by Gel/PVA-Modified Super-Paramagnetic Iron Oxide Nanoparticles

Adsorption of Cu(II) and Zn(II) Ions from Aqueous Solution by Gel/PVA-Modified Super-Paramagnetic Iron Oxide Nanoparticles

Hydrothermal synthesis of magnetic zeolite P from fly ash and its properties

Grewia spp. Biopolymer as Low-Cost Biosorbent for Hexavalent Chromium Removal

Contact Info

Product

Resources

About