Recent progress in metal-based composites toward adsorptive removal of phosphate: Mechanisms, behaviors, and prospects

Zhang, Peng; He, Mingming; Huo, Silu; Li, Fukuan; Li, Kexun

doi:10.1016/j.cej.2022.137081

Cited by 30 publications

(16 citation statements)

References 146 publications

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“…Excess of H + protonates the hydroxyl group from La, making it easier for the metal to bind to phosphate. However, at alkaline pH, the dominant orthophosphate species is PO 4 3which will compete with OHso it can bind to metals (Zhang et al, 2022). The pH condition that gave the best absorption was pH 3, with the amount of phosphate absorbed at 1.93 x 10 5 ng.…”

Section: Diffusion Coefficient Test Resultsmentioning

confidence: 99%

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Development Study of Binding Agent in Diffusive Gradient In Thin Films (DGT) Technique for Absorption of Phosphate Compounds using Nano-La2O3

Shafira

Yunarti

Saefumillah

2022

Valensi

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The abundance of phosphate is a concern because it causes problems in aquatic ecosystems. The diffusive gradient in thin films (DGT) technique is a promising method for phosphate absorption because it can be used in situ. The DGT device consists of a membrane filter, a diffusive gel, and a binding gel. The presence of a binding agent in the binding gel makes the specific analyte bound to the binding gel. One of the binding agents that can be used for phosphate absorption is La2O3. Binding gel La2O3 was successfully synthesized that proven by the similarity of FTIR peaks of the diffusive gel and binding gel. The typical absorption of La-O also proves it from the binding gel at 642 cm-1 and 423 cm-1. La2O3 binding gel was made of N,-N'-methylenebisacrylamide as a cross-linker with an elution factor of 97.4%. DGT-La2O3 proved capable of adsorption for 72 hours, with phosphate absorbed at 1.91 x 105 ng. DGT-La2O3 also has the optimum ability to absorb phosphate at pH 3 of 1.93 x 105 ng.

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Section: Diffusion Coefficient Test Resultsmentioning

confidence: 99%

“…) and increase the capability of phosphate absorption. When the pH is alkaline, the surface of the adsorbent is rich in negative charges due to OHin solution, resulting in electrostatic repulsion with HPO 4 2and PO 4 3-, thereby reducing the capability of phosphate absorption (Zhang et al, 2022).…”

Section: Diffusion Coefficient Test Resultsmentioning

confidence: 99%

Development Study of Binding Agent in Diffusive Gradient In Thin Films (DGT) Technique for Absorption of Phosphate Compounds using Nano-La2O3

Shafira

Yunarti

Saefumillah

2022

Valensi

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“…4 Increasingly stringent emission requirements have challenged conventional phosphate elimination methods such as biodegradation, physical removal, and chemical precipitation, because these traditional approaches still suffer from insufficient removal efficiency, excessive use of chemicals, and heavy energy consumption. [5][6][7] Therefore, the removal of phosphate is still faced with tremendous challenges. Electro-assisted adsorption has attracted increasing attention due to its distinct benets such as efficient performance, rapid reaction, and environmental friendliness, making it a promising technology for pollutants elimination.…”

Section: Introductionmentioning

confidence: 99%

Engineering bimetallic capture sites on hierarchically porous carbon electrode for efficient phosphate electrosorption: multiple active centers and excellent electrochemical properties

Zhang

et al. 2023

J. Mater. Chem. A

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“…Furthermore, MOF-derived porous metal/carbon composites have adjustable structures and large porosity . Their unique porous structures prominently increase the accessible adsorption sites and ensure the availability of active centers. , Importantly, the periodic network structure of the precursor connected by metal nodes and organic ligands ensures a uniform distribution of metal active sites in the derived carbon framework. In order to obtain porous carbon materials with atomically dispersed Fe–N active sites, bimetallic MOF carbonization can be a direct and effective method.…”

Section: Introductionmentioning

confidence: 99%

Uniformly Dispersed Fe–N Active Centers on Hierarchical Carbon Electrode for High-Performance Capacitive Deionization: Plentiful Adsorption Sites and Conductive Electron Transfer

Liu,

Zhang,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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Capacitive deionization (CDI) is a promising desalination technology to meet the growing demand for clean water resources. Carbon-based materials, as one of the most appealing electrode candidates for CDI, are still limited by low adsorption capacity and slow rates. Heteroatom doping of carbonaceous materials is considered a promising strategy for high-performance CDI desalination. Herein, hierarchically porous carbon with uniformly dispersed Fe–N active centers (FeNC) is fabricated by a one-step pyrolysis treatment from a Zn–Fe bimetal–organic framework. The systematic analysis demonstrated that the synergistic effect of the uniformly dispersed Fe and N increased the specific surface area and graphitization degree of the carbonaceous framework. Moreover, the electrochemical analysis confirmed that Fe intervention effectively increased the specific capacitance and reduced the charge-transfer resistance, ensuring a more desirable electrical double-layer capacitor (EDLC) behavior. As expected, FeNC exhibited an excellent electrosorption capacity of 28.88 mg g–1 and a faster rate (1.85 mg g–1 min–1). The results indicated that the introduction of trace Fe can not only modulate the structural properties of carbon materials to provide more accessible adsorption sites but also form Fe–N to accelerate electron transfer. This work provides a profound insight into the crucial role of Fe–N active centers in carbon-based CDI desalination.

show abstract

Recent progress in metal-based composites toward adsorptive removal of phosphate: Mechanisms, behaviors, and prospects

Cited by 30 publications

References 146 publications

Development Study of Binding Agent in Diffusive Gradient In Thin Films (DGT) Technique for Absorption of Phosphate Compounds using Nano-La2O3

Development Study of Binding Agent in Diffusive Gradient In Thin Films (DGT) Technique for Absorption of Phosphate Compounds using Nano-La2O3

Engineering bimetallic capture sites on hierarchically porous carbon electrode for efficient phosphate electrosorption: multiple active centers and excellent electrochemical properties

Uniformly Dispersed Fe–N Active Centers on Hierarchical Carbon Electrode for High-Performance Capacitive Deionization: Plentiful Adsorption Sites and Conductive Electron Transfer

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