Preparation of a ternary composite based on water caltrop shell derived biochar and gelatin/alginate for cadmium removal from contaminated water: Performances assessment and mechanism insight

Zong, Yiming; Wang, Xinxiang; Zhang, Hao; Li, Yan; Yu, Jian; Wang, Chen; Cai, Zhantao; Wei, Jincheng; Liu, Ding

doi:10.1016/j.ijbiomac.2023.123637

Cited by 23 publications

(5 citation statements)

References 49 publications

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“…The latter result suggests that Cadmium adsorption on peanut shells is better described by the pseudo-second-order model. The authors [20] had also observed that the adsorption kinetics of Cadmium on their different supports were well compatible with the pseudo-second-order model.…”

Section: Pseudo-first Ordermentioning

confidence: 63%

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Untitled

2023

AJC

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Peanut shells were used in this study as an adsorbent carrier in the treatment of wastewater containing a trace metal element (TME), namely cadmium, a pollutant with adverse effects on health and the environment. The influences of contact time between adsorbent and adsorbate, initial cadmium concentration, adsorbent mass, reaction medium temperature and solution pH were evaluated. To determine the optimum parameters, pseudo-first-order and pseudosecond-order kinetic models were applied to the experimental results of the contact time study. Similarly, experimental results relating to the influence of concentration and temperature were modeled. Modeling of the data from the adsorbateadsorbent contact time study showed that the kinetics of the cadmium adsorption reaction are well described by the pseudo-second-order kinetic model. The isotherm of the adsorption mechanism of cadmium ions (Cd 2+ ) by peanut shells is perfectly described by the Freundlich equation. Thermodynamic studies using temperature variation have shown that adsorption is spontaneous and endothermic. This study led to a low entropy during cadmium adsorption. The best adsorption capacity was obtained at low pH = 5, i.e. favorable adsorption in acidic media.

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Section: Pseudo-first Ordermentioning

confidence: 63%

“…On the other hand, work carried out by a number of authors on the removal of cadmium from wastewater using waste resources has shown that the Langmuir model best describes the adsorption process [20].…”

Section: Langmuirmentioning

confidence: 99%

Untitled

2023

AJC

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“…The peak at 529.8 eV was caused by Fe−O, 53 the peak at 531.3 eV by C−O, and the peak at 533.5 eV is because of the O−C�O group. 59 Fe 2p peaks are observed as Fe 2p 3/2 (711.4 eV) and Fe 2p 1/2 (724.2 eV), originating from the magnetite nanoparticles in the structure. The deconvoluted peaks at 711.2, 713.5, 717.2, 723.9, 724.2, 726.9, 730, and 733.6 eV are shown in Figure 2d.…”

Section: Characterization Of Magnetite and Beadsmentioning

confidence: 99%

“…O 1s (530.9 eV) was deconvoluted into three peaks at 529.8, 531.3, and 533.5 eV (Figure2c). The peak at 529.8 eV was caused by Fe−O,53 the peak at 531.3 eV by C−O, and the peak at 533.5 eV is because of the O−C�O group 59. Fe 2p peaks are observed as Fe 2p 3/2 (711.4 eV) and Fe 2p 1/2 (724.2 eV), originating from the magnetite nanoparticles in the structure.…”

mentioning

confidence: 99%

Magnetic Hydrogel Beads as a Reusable Adsorbent for Highly Efficient and Rapid Removal of Aluminum: Characterization, Response Surface Methodology Optimization, and Evaluation of Isotherms, Kinetics, and Thermodynamic Studies

İlktaç,

Bayir

2023

ACS Omega

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Biopolymers such as alginate and gelatin have attracted much attention because of their exceptional adsorption properties and biocompatibility. The magnetic hydrogel beads produced and used in this study had a core structure composed of magnetite nanoparticles and gelatin and a shell structure composed of alginate. The combination of the metal-ion binding ability of alginate and the mechanical strength of gelatin in magnetic hydrogel beads presents a new approach for the removal of metal from water sources. The beads were designed for aluminum removal and fully characterized using various methods, including Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy−energy-dispersive Xray spectroscopy, vibrating sample magnetometry, microcomputed tomography, and dynamic mechanical analysis. Statistical experimental designs were employed to optimize the parameters of the adsorption and recovery processes. Plackett−Burman Design, Box−Behnken Design, and Central Composite Design were used for identifying the significant factors and optimizing the parameters of the adsorption and recovery processes, respectively. The optimum parameters determined for adsorption are as follows: pH: 4, contact time: 30 min, adsorbent amount: 600 mg; recovery time: reagent 1 M HNO 3 ; and contact time: 40 min. The adsorption process was described by using the Langmuir isotherm model. It reveals a homogeneous bead surface and monolayer adsorption with an adsorption capacity of 5.25 mg g −1 . Limit of detection and limit of quantification values were calculated as 4.3 and 14 μg L −1 , respectively. The adsorption process was described by a pseudo-second-order kinetic model, which assumes that chemisorption is the rate-controlling mechanism. Thermodynamic studies indicate that adsorption is spontaneous and endothermic. The adsorbent was reusable for 10 successive adsorption−desorption cycles with a quantitative adsorption of 98.2% ± 0.3% and a recovery of 99.4% ± 2.6%. The minimum adsorbent dose was determined as 30 g L −1 to achieve quantitative adsorption of aluminum. The effects of the inorganic ions were also investigated. The proposed method was applied to tap water and carboy water samples, and the results indicate that magnetic hydrogel beads can be an effective and reusable bioadsorbent for the detection and removal of aluminum in water samples. The recovery values obtained by using the developed method were quantitative and consistent with the results obtained from the inductively coupled plasma optical emission spectrometer.

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“…Numerous studies have indicated that the adsorption efficiency of biochar for heavy metals is influenced by factors such as the feedstock used, pyrolysis conditions, electrokinetic potential, types of functional groups, and metal speciation [35][36][37][38][39][40][41]. Via composite treatment, biochar can develop unique molecular structures that not only enhance its physicochemical properties [42] but also facilitate the formation of stable complexes or precipitates with Cd [43][44][45]. Furthermore, biochar can undergo chemical modifications to enhance its ion exchange capacity and specific surface area [46,47], thus improving its adsorption capabilities.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Cadmium Adsorption Dynamics in Water and Soil by Polystyrene Microplastics and Biochar

Wang,

Jiang,

Wei

et al. 2024

Nanomaterials

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Microplastics (MPs) are prevalent emerging pollutants in soil environments, acting as carriers for other contaminants and facilitating combined pollution along with toxic metals like cadmium (Cd). This interaction increases toxic effects and poses substantial threats to ecosystems and human health. The objective of this study was to investigate the hydrodynamic adsorption of Cd by conducting experiments where polystyrene microplastics (PS) and biochar (BC) coexisted across various particle sizes (10 µm, 20 µm, and 30 µm). Then, soil incubation experiments were set up under conditions of combined pollution, involving various concentrations (0.5 g·kg−1, 5 g·kg−1, 50 g·kg−1) and particle sizes of PS and BC to assess their synergistic effects on the soil environment. The results suggest that the pseudo-second-order kinetic model (R2 = 0.8642) provides a better description of the adsorption dynamics of Cd by PS and BC compared to the pseudo-first-order kinetic model (R2 = 0.7711), with an adsorption saturation time of 400 min. The Cd adsorption process in the presence of PS and BC is more accurately modeled using the Freundlich isotherm (R2 > 0.98), indicating the predominance of multilayer physical adsorption. The coexistence of 10 µm and 20 µm PS particles with BC enhanced Cd absorption, while 30 µm PS particles had an inhibitory effect. In soil incubation experiments, variations in PS particle size increased the exchangeable Cd speciation by 99.52% and decreased the residual speciation by 18.59%. The addition of microplastics notably impacted the exchangeable Cd speciation (p < 0.05), with smaller PS particles leading to more significant increases in the exchangeable content—showing respective increments of 45.90%, 106.96%, and 145.69%. This study contributes to a deeper understanding of the mitigation mechanisms of biochar in the face of combined pollution from microplastics and heavy metals, offering theoretical support and valuable insights for managing such contamination scenarios.

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Preparation of a ternary composite based on water caltrop shell derived biochar and gelatin/alginate for cadmium removal from contaminated water: Performances assessment and mechanism insight

Cited by 23 publications

References 49 publications

Untitled

Untitled

Magnetic Hydrogel Beads as a Reusable Adsorbent for Highly Efficient and Rapid Removal of Aluminum: Characterization, Response Surface Methodology Optimization, and Evaluation of Isotherms, Kinetics, and Thermodynamic Studies

Enhanced Cadmium Adsorption Dynamics in Water and Soil by Polystyrene Microplastics and Biochar

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