Biosorption of Pb2+, Ni2+ and Cu2+ ions from aqueous solutions by L-cystein-modified montmorillonite-immobilized alginate nanocomposite

Mittal, Alok; Ahmad, Rais; Hasan, Imran

doi:10.1080/19443994.2015.1086900

Cited by 83 publications

(20 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, these results indicate that the CMC‐g‐AMPS hydrogel can be used more than five times for adsorption of Cu 2+ , Pb 2+ and Fe 3+ ions; however, the desorption ratios are expected to lower accordingly after each cycle and at slightly different rates, dependent on the metal ion. These results were found to be consistent with previous studies …”

Section: Resultssupporting

confidence: 94%

“…The positive values of Δ S ° indicate the increased randomness at the solid–liquid interface during the adsorption of Cu 2+ and Pb 2+ on CMC‐g‐AMPS hydrogel. These similar results were found by Mittal et al . and Wang et al .…”

Section: Resultssupporting

confidence: 92%

“…Therefore, the adsorption process of Cu 2+ , Pb 2+ and Fe 3+ onto CMC‐g‐AMPS hydrogel followed pseudo‐second‐order kinetic model and that the adsorption is probably controlled by the chemical adsorption process . This is in agreement with previous works, which study on other biosorbents …”

Section: Resultssupporting

confidence: 91%

“…However, adsorption experiment for Fe 3+ ions could not be performed at pH higher than 3 due to its hydroxide complex formation that would precipitate in solution . The decrease in the q e at pH higher than optimum pH was due to the formation of hydroxylated complexes of Cu 2+ , Pb 2+ and Fe 3+ ions in the solutions …”

Section: Resultsmentioning

confidence: 99%

“…Pseudo‐first‐order and pseudo‐second‐order kinetic models were used to examine the controlling mechanism of the adsorption process. The validity of the kinetic models for adsorption of metal ions can be interpreted by the linear plot for the pseudo‐first‐order and pseudo‐second‐order kinetic model which expressed as Equations and , respectively

normalln ((), q_{e} - q_{t}) = \ln q_{e} - \frac{k_{1} t}{2.303}

\frac{t}{q_{t}} = \frac{t}{q_{e}} + \frac{1}{k_{2} q_{e}^{2}}

where q e and q t are amounts of ions adsorbed onto hydrogels at equilibrium and at time t (min), respectively.…”

Section: Resultsmentioning

confidence: 99%

See 4 more Smart Citations

Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Panchan

Niamnuy

Dittanet

et al. 2017

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND An alternative carboxymethyl cellulose‐based biosorbent hydrogel was synthesized by grafting 2‐acrylamido‐2‐methylpropanesulfonic acid (AMPS) onto the prepared carboxymethyl cellulose backbone via microwave heating. Response surface methodology was employed to optimize the hydrogel synthesis condition for maximum gel content with respect to AMPS dose, N,N′‐methylene‐bis‐acrylamide dose, and microwave exposure time. The prepared gels were then characterized and evaluated in terms of their heavy metal ions adsorption performance and reusability. RESULTS The optimum synthesis condition yielded the maximum gel content and maximum equilibrium swelling of 96.33% and 2819 ± 15%, respectively. The Langmuir model fitted the experimental isotherm data well, with maximum adsorption capacity of 86.21, 102.04 and 33.56 mg g‐1 for Cu2+, Pb2+ and Fe3+, respectively. Microwave heating was clearly noted to result in hydrogel of higher porosity and could shorten the synthesis time by 88.33%; the gel content was 7.46% higher compared with that obtained via conventional heating. CONCLUSION Microwave‐assisted heating is a feasible alternative and an efficient technique for CMC‐g‐AMPS hydrogel synthesis. The optimized CMC‐g‐AMPS hydrogel exhibited good performance for Cu2+, Pb2+ and Fe3+ ions removal and was satisfactorily reused, thus contributing to the alleviation of environmental problems caused by discarded rice straw and water contaminated with heavy metal ions. © 2017 Society of Chemical Industry

show abstract

Section: Resultssupporting

confidence: 94%

Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

normalln ((), q_{e} - q_{t}) = \ln q_{e} - \frac{k_{1} t}{2.303}

\frac{t}{q_{t}} = \frac{t}{q_{e}} + \frac{1}{k_{2} q_{e}^{2}}

where q e and q t are amounts of ions adsorbed onto hydrogels at equilibrium and at time t (min), respectively.…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Panchan

Niamnuy

Dittanet

et al. 2017

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

Use of metal composite MOF‐5‐Ag₂O‐NPs as an adsorbent for the removal of Auramine O dye under ultrasound energy conditions

Hosseinpour

Karimipour

Ghaedi

et al. 2017

Applied Organom Chemis

View full text Add to dashboard Cite

In this work, MOF‐5 composited with Ag2O nanoparticles was prepared and characterized via X‐ray diffraction, field emission‐scanning electron microscopy, energy‐dispersive spectroscopy and FT‐IR analysis. This new material was subsequently employed for removing basic yellow dye [Auramine O (AO)] from aqueous solution under ultrasound irradiation. Several experiments were designed by central composite design in which operational parameters such as such as pH, MOF‐5‐Ag2O mass and initial concentration of AO involved in the process were optimized. The significance of individual parameters and their possible interactions were investigated using analysis of variance (anova). The optimum values of 6, 0.025 g and 6 mg l−1 were obtained for the pH, MOF‐5‐Ag2O‐NPs mass and the initial concentrations of AO, respectively, with desirability of 1.0. At such conditions, the efficiency for the removal of AO was found to be 89.45%. Various isotherm models for fitting the experimental equilibrium data were studied, and it was found that the Langmuir model has the highest efficiency for correlation of experimental equilibrium data, so that the monolayer adsorption capacity of MOF‐5‐Ag2O for successful removal of AO was 260.70 mg g−1 at optimal conditions.

show abstract

Adsorption of methylene blue onto sugarcane bagasse‐based adsorbent materials

Al‐Mokhalelati

Al‐Bakri

Wattar

2021

J of Physical Organic Chem

View full text Add to dashboard Cite

Sugarcane bagasse (SB) before and after alkaline treatment has been investigated for the removal of methylene blue (MB) from aqueous solutions. The results showed that the adsorption was chemical in nature and the OH, C=O, and C-O groups were particularly responsible for MB dye adsorption. The optimum concentration of MB solution was fixed at 0.1 gr/50 mL in both treated and untreated SB. Batch adsorption studies are used to derive the optimum adsorption conditions. A contact time of 90 min, a pH range from 5 to 9, a dose of 0.1 g, and an initial concentration of the MB of 100 ppm were chosen. The amount of adsorbed MB dye on the surface of the SB was temperature dependent, and the adsorption increases with increasing temperature. The values of ΔH , ΔG , and ΔS indicated endothermic but spontaneous process. The overall results indicated that SB was a promising candidate for dye removals.

show abstract

Biosorption of Pb²⁺, Ni²⁺ and Cu²⁺ ions from aqueous solutions by L-cystein-modified montmorillonite-immobilized alginate nanocomposite

Cited by 83 publications

References 38 publications

Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Use of metal composite MOF‐5‐Ag₂O‐NPs as an adsorbent for the removal of Auramine O dye under ultrasound energy conditions

Adsorption of methylene blue onto sugarcane bagasse‐based adsorbent materials

Contact Info

Product

Resources

About

Biosorption of Pb2+, Ni2+ and Cu2+ ions from aqueous solutions by L-cystein-modified montmorillonite-immobilized alginate nanocomposite

Cited by 83 publications

References 38 publications

Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Use of metal composite MOF‐5‐Ag2O‐NPs as an adsorbent for the removal of Auramine O dye under ultrasound energy conditions

Adsorption of methylene blue onto sugarcane bagasse‐based adsorbent materials

Contact Info

Product

Resources

About

Biosorption of Pb²⁺, Ni²⁺ and Cu²⁺ ions from aqueous solutions by L-cystein-modified montmorillonite-immobilized alginate nanocomposite

Use of metal composite MOF‐5‐Ag₂O‐NPs as an adsorbent for the removal of Auramine O dye under ultrasound energy conditions