Facile synthesis of eggshell biochar beads for superior aqueous phosphate adsorption with potential urine P-recovery

Wang, Li; Wang, Jingyi; Wei, Yifei

doi:10.1016/j.colsurfa.2021.126589

Cited by 32 publications

(5 citation statements)

References 56 publications

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“…The modification with zinc ameliorated the problem of poor phosphate adsorption using just the eggshell. A number of different published research papers on the use of eggshells for phosphate capture is available in the literature [35][36][37][38][39][40][41]. The adsorption of phosphate by ZnO-activated eggshells, supported on clay (kaolinite), is here reported for the first time to demonstrate its potential for phosphate removal from contaminated water.…”

Section: Introductionmentioning

confidence: 87%

One‐Pot Synthesis of ZnO‐Activated Eggshell@kaolinite: Sorbents for Phosphate Capture in Water

Bayode,

Badamasi,

Olusola

et al. 2023

Chem Eng & Technol

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The availability of colossal amounts of phosphate in water bodies has led to serious environmental challenges all over the world. In this study, a new adsorbent was synthesized using treated kaolinite clay, pulverized eggshells, and ZnCl2. Surface characterizationof these adsorbents showed the availability of functional moieties, morphological variations, pore sizes, particle sizes, etc. Adsorption of phosphate occurs via multiple mechanisms, comprising ligand exchange, complexation, hydrogen bonding, and electrostatic interaction, among others. The effect of pH, showed that maximum adsorption of 93.3 % was achieved at pH 3.0. It was also shown that these cost‐effective adsorbents could be regenerated in six cycles, hence increasing their applicability.

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Section: Introductionmentioning

confidence: 87%

One‐Pot Synthesis of ZnO‐Activated Eggshell@kaolinite: Sorbents for Phosphate Capture in Water

Bayode,

Badamasi,

Olusola

et al. 2023

Chem Eng & Technol

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“…BC contains lignocellulosic components capable of effectively adsorbing fluoride ( Yadav and Jagadevan 2020 ). The pyrolysis temperature is a key factor in controlling the number of functional groups on the surface of BC ( Wang et al, 2021 ). Generally, biochar prepared by hydrothermal pyrolysis below 573 K is rich in oxygen-containing functional groups (-COOH, -OH, etc.)…”

Section: Conventional Types Of Adsorbentsmentioning

confidence: 99%

“…The adsorption mechanism was outer-sphere complexation between Ca and F. Although shell biochar has low carbon content and small specific surface area ( S BET = 4.363 m 2 /g), the maximum fluoride adsorption capacity of their prepared shell biochar MCS-800 could reach 82.93 mg/g. The biochar obtained by pyrolysis alone has an average low adsorption effect but has the advantage of being easily modified ( Wang et al, 2021 ).…”

Section: Conventional Types Of Adsorbentsmentioning

confidence: 99%

Synergistic Fluoride Adsorption by Composite Adsorbents Synthesized From Different Types of Materials—A Review

Wei

Wang

et al. 2022

Front. Chem.

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The reduction of fluoride concentrations in water is one of many concerns. Adsorption is the most widely used technology for fluoride removal and the center to development of adsorption technology is the improvement of adsorbents. This review classifies the typical fluoride removal adsorbents into four types: metal oxides/hydroxides, biopolymers, carbon-based, and other adsorbents. The exploitation of new materials and the synthesis of composite materials are two ways of developing new adsorbents. In comparison to the discovery of novel adsorbents for fluoride adsorption, research into the composite synthesis of different types of conventional adsorbents has proliferated in recent years. The traditional adsorbents used the earliest, metal oxides, can act as active centers in a wide range of applications for modifying and compounding with other types of adsorbents. This study emphasizes reviewing the research on fluoride removal by composite adsorbents synthesized from different types of metal-modified materials. Seven factors were compared in terms of material characterization, initial fluoride concentration, adsorbent dose, pH, temperature, reaction time, and maximum adsorption capacity. The modification of composite adsorbents is facile and the synergistic effect of the different types of adsorbents significantly improves fluoride adsorption capacity. Metal composite adsorbents are synthesized by facile coprecipitation, hydrothermal, or impregnation modification methods. The adsorption mechanisms involve electrostatic attraction, ion exchange, complexation, and hydrogen bonding. The fluoride adsorption capacity of composite adsorbents has generally improved, indicating that most modifications are successful and have application prospects. However, to achieve significant breakthroughs in practical applications, numerous issues such as cost, separation/regeneration performance, and safety still need to be considered.

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“…8,9 Thus far, the commonly used methods for phosphate removal include chemical precipitation, 10 biological, 11 membrane separation, 12 and adsorption methods. 13 Among them, the adsorption method has the advantages of low economic cost, simple operation, and high efficiency. It is currently one of the most common and effective methods to remove phosphate from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of MgAl-LDH@ZIF-8 composites by in situ growth method for highly efficient phosphate removal

et al. 2022

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Facile synthesis of eggshell biochar beads for superior aqueous phosphate adsorption with potential urine P-recovery

Cited by 32 publications

References 56 publications

One‐Pot Synthesis of ZnO‐Activated Eggshell@kaolinite: Sorbents for Phosphate Capture in Water

One‐Pot Synthesis of ZnO‐Activated Eggshell@kaolinite: Sorbents for Phosphate Capture in Water

Synergistic Fluoride Adsorption by Composite Adsorbents Synthesized From Different Types of Materials—A Review

Synthesis of MgAl-LDH@ZIF-8 composites by in situ growth method for highly efficient phosphate removal

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