Adsorption of Cd(II) in water by mesoporous ceramic functional nanomaterials

Xue, Zhongjun; Liu, Na; Hu, Hongxiang; Huang, Jieying; Kalkhajeh, Yusef Kianpoor; Wu, Xiuyuan; Xu, Nian; Fu, Xiaofei; Zhan, Linchuan

doi:10.1098/rsos.182195

Cited by 13 publications

(6 citation statements)

References 37 publications

(57 reference statements)

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“…As mentioned by Hossein et al, on increasing pH from 4 to 7, the percent of photoreduction decreased . It is suggested that the photoreduction of the metallic cation is significantly dependent on their tendency toward the hydrolysis reaction. ,, …”

Section: Methodsmentioning

confidence: 84%

“…Heavy metals such as lead, mercury, cadmium, nickel, and chromium are found in the wastewater of various industries such as mining, petrochemicals, pharmaceuticals, plastic products, paper, and fabric dyeing. − Because of the adverse effects of heavy metals, many of their derivatives are classified as pollutants . Penetration of heavy metals inside the body leads to various adverse effects and also many diseases .…”

Section: Introductionmentioning

confidence: 99%

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Ex Situ Method for Photoreduction of the Cadmium Ion from Terbium-Loaded Bismuth Vanadium Oxide

2021

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The photoreduction of Cd (II) to Cd (0) was performed using Bi 4 V 2 O 11 , which was tremendously enhanced by Tb 3+ -doped Bi 4 V 2 O 11 . The relationship between charge carrier isolation and light harvesting was studied in depth in this research, and a promising technique for fabricating effective photocatalysts for heavy metals was discovered. Lattice disorder effects due to size variance between V 5+ and Tb 3+ cations in Bi 4 V 2 O 11 nanomaterials substituted with an invariable Tb 3+ cation at different concentrations (x = 15, 20, and 25%). Bi 4 V 2 O 11 and 15% Tb/Bi 4 V 2 O 11 evidenced a coexistence of monoclinic (α-phase) with a CS/m symmetry, while 25% Tb/Bi 4 V 2 O 11 was tetragonal (γ-phase) with an I4/mmm symmetry. Raman scattering experiments elucidated the changes in Bi 4 V 2 O 11 lattice corresponding to oxygen motion, suggesting significant destabilization of the VO 4 tetrahedra after addition of Tb 3+ . The SEM micrograph depicted a disparity in the microstructure with reduced grain size in 25% Tb/ Bi 4 V 2 O 11 samples. However, the TEM micrographs of 25% Tb/Bi 4 V 2 O 11 nanomaterials revealed that crystallite sizes of 25−35 nm were obtained, presenting a single tetragonal phase, highly homogeneous in nature. Impedance spectroscopy was used to study the conductivity of these compounds in the temperature range of 300 °C. At 300 °C, the compounds with x = 25% showed a conductivity of 15.92 S cm −1 . The conductivity values were found to be comparable with the highest values reported in the literature for similar compounds.

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Section: Methodsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Ex Situ Method for Photoreduction of the Cadmium Ion from Terbium-Loaded Bismuth Vanadium Oxide

2021

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“…The effects on Cd sorption of five operational conditions were studied: wastewater pH, adsorbent dosage, contact time, metal concentration and wastewater salinity. The experimental conditions for Cd adsorption were adapted from suitable references [31][32][33][34][35]. The setup for Cd sorption with the ranges of the operational conditions is presented in Figure 2.…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

A Mineral By-Product from Gasification of Poultry Feathers for Removing Cd from Highly Contaminated Synthetic Wastewater

Gusiatin

Kumpienė

Janiszewska³

et al. 2020

Minerals

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Ash from poultry feather gasification was investigated as an adsorbent for Cd removal from synthetic wastewater under a range of operational conditions: initial pH (2–8) and salinity (8–38 mS/cm) of wastewater, ash dosage (2.5–50 g/L), Cd concentration (25–800 mg/L) and contact time (5–720 min). The ash was highly alkaline and had low surface area and micropores averaging 1.12 nm in diameter. Chemical/mineralogical analysis revealed a high content of P2O5 (39.9 wt %) and CaO (35.5 wt %), and the presence of calcium phosphate, hydroxyapatite and calcium. It contained only trace amounts of heavy metals, BTEX, PAHs and PCBs, making it a safe mineral by-product. Cd adsorption was described best with Langmuir and pseudo-second order models. At pH 5, an ash dosage of 5 g/L, 40 min contact time and 100 mg Cd/L, 99% of Cd was removed from wastewater. The salinity did not affect Cd sorption. The maximum adsorption capacity of Cd was very high (126.6 mg/g). Surface precipitation was the main mechanism of Cd removal, possibly accompanied by ion exchange between Cd and Ca, coprecipitation of Cd with Ca-mineral components and Cd complexation with phosphate surface sites. Poultry ash effectively removes high concentrations of toxic Cd from wastewater.

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“…PEO is a crystalline thermoplastic water-soluble polymer with the molecular formula of H-(-O-CH 2 -CH 2 -)n-OH. Changes in PEO molecular weight determine its properties [21]. In addition to SA, nanomaterials have been also suggested to be promising to remove environmental heavy metals due to their silica and phosphorus-containing minerals, recyclability, and specific surface area as large as 180 m 2 •g −1 .…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cu (II) and Cd (II) from Wastewater by Sodium Alginate Modified Materials

Zhao

Zhan

Xue

et al. 2020

Journal of Chemistry

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Natural macromolecule adsorbing materials are alternatives for remediation of heavy metals’ polluted waters. In this study, sodium alginate composite gel (SACL) was synthesized from sodium alginate (SA), polyethylene glycol oxide (PEO), and nanomaterials to remove wastewater Cu (II) and Cd (II). The adsorption efficiency of SACL was analysed in relation to the contact time, initial concentrations of metal ions, temperature, adsorbent dosage, and solution pH. Three models, i.e., kinetic model, isothermal adsorption model, and thermodynamic model, were used to fit the experimental data. Our results showed that the highest removal rates of Cu (II) and Cd (II) from wastewater were 96.8% and 78%, respectively, under the condition of the best liquid-solid ratio of 12.5 ml·g−1, and the contact time of 180 min (25°C). Overall, the SACL adsorption of Cu (II) and Cd (II) was spontaneous. The adsorption kinetics and the isothermal adsorption were fitted well with the pseudo-second-order kinetic equation and Langmuir equation, respectively. Combined with SEM-EDS and FTIR analysis, results suggested that SACL adsorbs wastewater Cu (II) and Cd (II) mainly through chemical reaction on its surface area. Altogether, this work concludes on SACL as an efficient and ecofriendly adsorbent for wastewater Cu (II) and Cd (II).

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Adsorption of Cd(II) in water by mesoporous ceramic functional nanomaterials

Cited by 13 publications

References 37 publications

Ex Situ Method for Photoreduction of the Cadmium Ion from Terbium-Loaded Bismuth Vanadium Oxide

Ex Situ Method for Photoreduction of the Cadmium Ion from Terbium-Loaded Bismuth Vanadium Oxide

A Mineral By-Product from Gasification of Poultry Feathers for Removing Cd from Highly Contaminated Synthetic Wastewater

Adsorption of Cu (II) and Cd (II) from Wastewater by Sodium Alginate Modified Materials

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