Preparation and application of granular bentonite-eggshell composites for heavy metal removal

Wang, Guifang; Liu, Na; Zhang, Shuai; Zhu, Jingyi; Xiao, Huizhen; Ding, Chenhui

doi:10.1007/s10934-022-01208-2

Cited by 8 publications

(3 citation statements)

References 58 publications

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“…As a result, the high lead adsorption should be found at the pH of solution higher than pH pzc (pH solution > pH pzc ) with a negatively charged of adsorbent surface. Since the pH pzc of DP, DPF, CDP, and CDPF were 4.58, 5.31, 5.96, and 6.75, their lead adsorptions should occur at pH of solution > pH 4 by the process of electrostatic interaction 68 agreed with the results of pH effect that the highest lead removal efficiencies of all materials were found at pH 5. For ion exchange, the substitution of calcium ions (Ca 2+ ) from (CaCO 3 or CaO) in DP, DPF, CDP, and CDPF surfaces by Pb 2+ might happen through the ion exchange process 69 .…”

Section: The Possible Mechanisms Of Lead Adsorption By Duck Eggshell ...supporting

confidence: 74%

Influence of duck eggshell powder modifications by the calcination process or addition of iron (III) oxide-hydroxide on lead removal efficiency

Praipipat,

Ngamsurach,

Tannadee

2023

Sci Rep

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Lead-contaminated wastewater causes toxicity to aquatic life and water quality for water consumption, so it is required to treat wastewater to be below the water quality standard before releasing it into the environment. Duck eggshell powder (DP), duck eggshell powder mixed iron (III) oxide-hydroxide (DPF), calcinated duck eggshell powder (CDP), and calcinated duck eggshell powder mixed iron (III) oxide-hydroxide (CDPF) were synthesized, characterized, and investigated lead removal efficiencies by batch experiments, adsorption isotherms, kinetics, and desorption experiments. CDPF demonstrated the highest specific surface area and pore volume with the smallest pore size than other materials, and they were classified as mesoporous materials. DP and DPF demonstrated semi-crystalline structures with specific calcium carbonate peaks, whereas CDP and CDPF illustrated semi-crystalline structures with specific calcium oxide peaks. In addition, the specific iron (III) oxide-hydroxide peaks were detected in only DPF and CDPF. Their surface structures were rough with irregular shapes. All materials found carbon, oxygen, and calcium, whereas iron, sodium, and chloride were only found in DPF and CDPF. All materials were detected O–H, C=O, and C–O, and DPF and CDPF were also found Fe–O from adding iron (III) oxide-hydroxide. The point of zero charges of DP, DPF, CDP, and CDPF were 4.58, 5.31, 5.96, and 6.75. They could adsorb lead by more than 98%, and CDPF illustrated the highest lead removal efficiency. DP and CDP corresponded to the Langmuir model while DPF and CDPF corresponded to the Freundlich model. All materials corresponded to a pseudo-second-order kinetic model. Moreover, they could be reusable for more than 5 cycles for lead adsorption of more than 73%. Therefore, CDPF was a potential material to apply for lead removal in industrial applications.

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Section: The Possible Mechanisms Of Lead Adsorption By Duck Eggshell ...supporting

confidence: 74%

Influence of duck eggshell powder modifications by the calcination process or addition of iron (III) oxide-hydroxide on lead removal efficiency

Praipipat,

Ngamsurach,

Tannadee

2023

Sci Rep

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“…This protein acid mucopolysaccharide has hydroxyl (-OH), carboxyl (-COOH), amino (-NH 2 ), thiol (-SH), and amide (-CONH 2 ) functional groups that can be employed to bind heavy metal ions [5]. Wang et al [6] prepared a granular bentonite-eggshell composite biosorbent for removing lead (II). This granular biosorbent increased the pH of acid mine drainage from 3.00 to 6.10, indicating that the acid-neutralizing capabilities of granular bentonite-eggshell composites can minimize H+ competitive adsorption.…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of Biosorbent Film from Eggshell/Orange Waste Enriched with Banana Starch

Vonnie,

Rovina,

‘Aqilah

et al. 2023

Polymers

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The conversion of waste into a valuable product is regarded as a promising alternative to relieving the burden of solid waste management and could be beneficial to the environment and humans. This study is focused on utilizing eggshell and orange peel enriched with banana starch to fabricate biofilm via the casting technique. The developed film is further characterized by field emission scanning electron microscope (FESEM), energy dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The physical properties of films, including thickness, density, color, porosity, moisture content, water solubility, water absorption, and water vapor permeability, were also characterized. The removal efficiency of the metal ions onto film at different contact times, pH, biosorbent dosages, and initial concentration of Cd(II) were analyzed using atomic absorption spectroscopy (AAS). The film’s surface was found to have a porous and rough structure with no cracks, which can enhance the target analytes interactions. EDX and XRD analyses confirmed that eggshell particles were made of calcium carbonate (CaCO3), and the appearance of the main peak at 2θ = 29.65° and 2θ = 29.49° proves the presence of calcite in eggshells. The FTIR indicated that the films contain various functional groups, such as alkane (C-H), hydroxyl (-OH), carbonyl (C=O), carbonate (CO32−), and carboxylic acid (-COOH) that can act as biosorption materials. According to the findings, the developed film exhibits a notable enhancement in its water barrier properties, thereby leading to improved adsorption capacity. The batch experiments showed that the film obtained the maximum removal percentage at pH = 8 and 6 g of biosorbent dose. Notably, the developed film could reach sorption equilibrium within 120 min at the initial concentration of 80 mg/L and remove 99.95% of Cd(II) in the aqueous solutions. This outcome presents potential opportunities for the application of these films in the food industry as both biosorbents and packaging materials. Such utilization can significantly enhance the overall quality of food products.

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“…The previous research indicates that ES has the potential to be a good sorbent due to its high carbon and calcium concentrations, as well as its high porosity and good accessibility of functional groups. Recently, Wang et al [ 22 ] studied the application of granular bentonite−eggshell composites (BEP) for the removal of heavy metal (Pb). BEP had an elimination ratio of over 99.90% and an adsorption capacity of over 40 mg/g of Pb, respectively.…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of the Biodegradable Film Derived from Eggshell and Cornstarch

Vonnie

Rovina

Azhar

et al. 2022

JFB

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In the current study, cornstarch (CS) and eggshell powder (ESP) were combined using a casting technique to develop a biodegradable film that was further morphologically and physicochemically characterized using standard methods. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to characterize the morphology of the ESP/CS film, and the surface of the film was found to have a smooth structure with no cracks, a spherical and porous irregular shape, and visible phase separation, which explains their large surface area. In addition, the energy dispersive X-ray (EDX) analysis indicated that the ESP particles were made of calcium carbonate and the ESP contained carbon in the graphite form. Fourier Transform Infrared Spectroscopy indicated the presence of carbonated minerals in the ESP/CS film which shows that ESP/CS film might serve as a promising adsorbent. Due to the inductive effect of the O–C–O bond on calcium carbonate in the eggshell, it was discovered that the ESP/CS film significantly improves physical properties, moisture content, swelling power, water solubility, and water absorption compared to the control CS film. The enhancement of the physicochemical properties of the ESP/CS film was principally due to the intra and intermolecular interactions between ESP and CS molecules. As a result, this film can potentially be used as a synergistic adsorbent for various target analytes.

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Preparation and application of granular bentonite-eggshell composites for heavy metal removal

Cited by 8 publications

References 58 publications

Influence of duck eggshell powder modifications by the calcination process or addition of iron (III) oxide-hydroxide on lead removal efficiency

Influence of duck eggshell powder modifications by the calcination process or addition of iron (III) oxide-hydroxide on lead removal efficiency

Development and Characterization of Biosorbent Film from Eggshell/Orange Waste Enriched with Banana Starch

Development and Characterization of the Biodegradable Film Derived from Eggshell and Cornstarch

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