Photoreduction of Pb(II) ions from aqueous solution by titania polyvinylalcohol–alginate beads

Majidnia, Zohreh; Fulazzaky, Mohamad Ali

doi:10.1016/j.jtice.2016.05.024

Cited by 20 publications

(6 citation statements)

References 39 publications

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“…The kinetic behavior of the metal ions removed by CA beads is presented in Figure 3. The experimental data were fitted with pseudo-first-order and pseudo-second-order kinetics [24,25].…”

Section: Adsorption Kineticsmentioning

confidence: 99%

The Fabrication of Calcium Alginate Beads as a Green Sorbent for Selective Recovery of Cu(Ⅱ) from Metal Mixtures

et al. 2019

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Calcium alginate (CA) beads as a green sorbent were easily fabricated in this study using sodium alginate crosslinking with CaCl2, and the crosslinking pathway was the exchange between the sodium ion of α-L-guluronic acid and Ca(II). The experimental study was conducted on Cu(II), Cd(II), Ni(II) and Zn(II) as the model heavy metals and the concentration was determined by inductively coupled plasma optical emission spectrometry (ICP-OES). The characterization and sorption behavior of the CA beads were analyzed in detail via using scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The adsorption experiments demonstrated that the CA beads exhibited a high removal efficiency for the selective adsorption of Cu(II) from the tetra metallic mixture solution and an excellent adsorption capacity of the heavy metals separately. According to the isotherm studies, the maximum uptake of Cu(II) could reach 107.53 mg/g, which was significantly higher than the other three heavy metal ions in the tetra metallic mixture solution. Additionally, after five cycles of adsorption and desorption, the uptake rate of Cu(II) on CA beads was maintained at 92%. According to the properties mentioned above, this material was assumed to be applied to reduce heavy metal pollution or recover valuable metals from waste water.

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“…The kinetic behavior of the metal ions removed by CA beads is presented in Figure 3. The experimental data were fitted with pseudo-first-order and pseudo-second-order kinetics [24,25].…”

Section: Adsorption Kineticsmentioning

confidence: 99%

The Fabrication of Calcium Alginate Beads as a Green Sorbent for Selective Recovery of Cu(Ⅱ) from Metal Mixtures

et al. 2019

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“…In wastewater treatment, studies have shown that poly(vinyl alcohol) (PVA) can strengthen and support the structure of CS-polymers by forming hydrogen bonds with the NH 2 groups of CS [ 26 , 29 ]. Moreover, PVA is used extensively to remove heavy metal ions from water due to its excellent chemical stability, biodegradability, biocompatibility, hydrophilicity, and high adsorption capacity [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

Aljar

Rashdan

Almutawah

et al. 2023

Gels

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Globally, water contamination by heavy metals is a serious problem that affects the environment and human health. Adsorption is the most efficient way of water treatment for eliminating heavy metals. Various hydrogels have been prepared and used as adsorbents to remove heavy metals. By taking advantage of poly(vinyl alcohol) (PVA), chitosan (CS), cellulose (CE), and the process for physical crosslinking, we propose a simple method to prepare a PVA-CS/CE composite hydrogel adsorbent for the removal of Pb(II), Cd(II), Zn(II) and Co(II) from water. Structural analyses of the adsorbent were examined by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy-energy dispersive X-ray (SEM-EDX) analysis, and X-ray diffraction (XRD). PVA-CS/CE hydrogel beads had a good spherical shape together with a robust structure and suitable functional groups for the adsorption of heavy metals. The effects of adsorption parameters such as pH, contact time, adsorbent dose, initial concentration of metal ions, and temperature on the adsorption capacity of PVA-CS/CE adsorbent were studied. The adsorption characteristics of PVA-CS/CE for heavy metals may be completely explained by pseudo-second-order adsorption and the Langmuir adsorption model. The removal efficiency of PVA-CS/CE adsorbent for Pb(II), Cd(II), Zn(II), and Co(II) was 99, 95, 92, and 84%, respectively, within 60 min. The heavy metal’s hydrated ionic radius may be crucial in determining the adsorption preference. After five consecutive adsorption–desorption cycles, the removal efficiency remained over 80%. As a result, the outstanding adsorption-desorption properties of PVA-CS/CE can potentially be extended to industrial wastewater for heavy metal ion removal.

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“…Pb(II) ions are one of the most dangerous heavy metals found in wastewaters being carcinogenic to human organs and aquatic life [2]. Pb(II) ions exist in waste of many industries, such as acid battery manufacturing, metal plating and finishing, ammunition, ceramic and glass manufacturing [3].…”

Section: Introductionmentioning

confidence: 99%

Fe₂O₃/TiO₂/Activated Carbon Nanocomposite with Synergistic Effect of Adsorption and Photocatalysis

2020

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Fe2O3/TiO2/activated carbon (FT/AC) nanocomposites supported on silica gel beads were synthesized using a sonochemical method and fully characterized. The response surface method was applied to optimize the removal of Pb(II) ions by nanocomposites under visible light. The experiments were conducted by adjusting three parameters, i.e., initial concentration of Pb(II) ions, dosage of Fe2O3/TiO2 (FT) photocatalyst, and pH. The FT/AC nanocomposite showed higher efficiency for Pb(II) ion removal in comparison with FT due to the synergistic effect of activated carbon combined with Fe2O3/TiO2.

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Photoreduction of Pb(II) ions from aqueous solution by titania polyvinylalcohol–alginate beads

Cited by 20 publications

References 39 publications

The Fabrication of Calcium Alginate Beads as a Green Sorbent for Selective Recovery of Cu(Ⅱ) from Metal Mixtures

The Fabrication of Calcium Alginate Beads as a Green Sorbent for Selective Recovery of Cu(Ⅱ) from Metal Mixtures

Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

Fe₂O₃/TiO₂/Activated Carbon Nanocomposite with Synergistic Effect of Adsorption and Photocatalysis

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Photoreduction of Pb(II) ions from aqueous solution by titania polyvinylalcohol–alginate beads

Cited by 20 publications

References 39 publications

The Fabrication of Calcium Alginate Beads as a Green Sorbent for Selective Recovery of Cu(Ⅱ) from Metal Mixtures

The Fabrication of Calcium Alginate Beads as a Green Sorbent for Selective Recovery of Cu(Ⅱ) from Metal Mixtures

Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

Fe2O3/TiO2/Activated Carbon Nanocomposite with Synergistic Effect of Adsorption and Photocatalysis

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Product

Resources

About

Fe₂O₃/TiO₂/Activated Carbon Nanocomposite with Synergistic Effect of Adsorption and Photocatalysis