Efficient phosphate adsorption by a composite composed of Mg6Al2(CO3)(OH)16·4H2O LDH and Chitosan: kinetic, thermodynamic, desorption, and characterization studies

Ribeiro, Nathália Isidoro; Pessanha, Otávio Barreto; Pessanha, Maria Luiza Gomes Soares; Guimarães, Damaris

doi:10.1016/j.seppur.2022.122717

Cited by 25 publications

(7 citation statements)

References 60 publications

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“…The process of phosphate adsorption by the La–Ca–CO 3 adsorbent was endothermic and entropy-increasing due to the positive values of Δ S ° (241.44 kJ/mol·K) and Δ H ° (62.87 kJ/mol) . Chemisorption was the main adsorption mechanism for the phosphate adsorption in the present study when the absolute term of Δ H ° value is higher than 40 kJ/mol . Increasing the number of species at the solid/liquid interface may result in increased randomness, which is attributed to the positive Δ S ° value referring to the adsorption process …”

Section: Resultsmentioning

confidence: 90%

“…19 Moreover, the value of R L is 0.0054, suggesting that the phosphate adsorption on La−Ca−CO 3 adsorbent is favorable, which also indicates that there is a higher interaction between adsorbent and phosphate. 9,30 The values of Langmuir and Freundlich model constants are summarized in Table 3, in which the maximum adsorption capacity calculated from Langmuir was 44.96 mg• P/g, which is higher than those reported for La-doped adsorbents such as La(OH) 3 -modified canna biochar (37.37 mg•P/g), 31 La-coal fly ash�blast furnace cement composite (24.9 mg P/g), 9 and La-lignocellulose biochar (36.06 mg•P/ g). 32 3.4.…”

Section: Isothermal Studymentioning

confidence: 99%

“…33 Chemisorption was the main adsorption mechanism for the phosphate adsorption in the present study when the absolute term of ΔH°value is higher than 40 kJ/mol. 30 Increasing the number of species at the solid/liquid interface may result in increased randomness, which is attributed to the positive ΔS°v alue referring to the adsorption process. 34 3.5.…”

Section: Isothermal Studymentioning

confidence: 99%

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Removal of Low-Concentration Phosphate Adsorption by La–Ca–CO₃ Material: Performance, Mechanism, and Applicability

Ye,

Xu,

Huang

et al. 2023

Ind. Eng. Chem. Res.

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An environmentally sustainable La−Ca−CO 3 adsorbent was synthesized by coprecipitation. This study investigated the adsorption behaviors and mechanisms of low concentrations of phosphate (0.5−2 mg•P/L) onto La−Ca−CO 3 . The adsorbent remediated phosphate with a maximum capacity of 44.96 mg•P/g and generated isotherms fitting well with the Langmuir model. Reaction kinetics signified a pseudo-second-order model. The effect of pH, ionic strength, and coexisting anions on phosphate adsorption on the La−Ca−CO 3 adsorbent was checked via batch experiments. Diminutive pH independence was observed in the range from 3 to 10 with an initial phosphorus concentration of 2 mg•P/L at an adsorbent dosage of 0.1 g/L and 4 to 11 with an initial phosphorus concentration of 0.5 mg•P/L at an adsorbent dosage of 0.025 g/L, respectively. The minimal dosages of the adsorbent for reducing the residual P to lower than 20 μg/L were found to be 0.1 g/L for 2 mg•P/L initial phosphorus concentration and 0.025 g/L 0.5 mg•P/L initial phosphate concentration, respectively. The properties of La−Ca−CO 3 adsorbent revealed the mechanisms of phosphate, including Fourier transform infrared spectroscopy and X-ray diffraction.

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Section: Resultsmentioning

confidence: 90%

Section: Isothermal Studymentioning

confidence: 99%

Section: Isothermal Studymentioning

confidence: 99%

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Removal of Low-Concentration Phosphate Adsorption by La–Ca–CO₃ Material: Performance, Mechanism, and Applicability

Ye,

Xu,

Huang

et al. 2023

Ind. Eng. Chem. Res.

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“…MgAl-LDH (3:1) can also grow on ball-milled biochar (BMBC) by co-precipitation, demonstrating a higher phosphate adsorption capacity of 52.6 mg of P/g at pH of 3 indicating the surface area dominated effect. Ribeiro et al investigated the P adsorption–desorption performance of the MgAl-LDH/chitosan shown in Figure a, showing two-times higher P adsorption and desorption performance compared to bare chitosan and LDH (Table ). Similarly, ZnAl-LDH was grafted on banana bract-derived AC, which showed non-expensive, high surface area, universally accessible, and multiple reactive groups (carbonyl, hydroxyl, carboxylic, and phenolic groups), facilitating phosphate adsorption .…”

Section: Progress Of Ldhs In Phosphate Removal and Recyclingmentioning

confidence: 99%

Layered Double Hydroxides for Regulating Phosphate in Water to Achieve Long-Term Nutritional Management

et al. 2023

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Hunger and undernourishment are increasing global challenges as the world’s population continuously grows. Consequently, boosting productivity must be implemented to reach the global population’s food demand and avoid deforestation. The current promising agricultural practice without herbicides and pesticides is fertilizer management, particularly that of phosphorus fertilizers. Layered double hydroxides (LDHs) have recently emerged as favorable materials in phosphate removal, with practical application possibilities in nanofertilizers. This review discusses the fundamental aspects of phosphate removal/recycling mechanisms and highlights the current endeavors on the development of phosphate-selective sorbents using LDH-based materials. Specific emphasis is provided on the progress in designing LDHs as the slow release of phosphate fertilizers reveals their relevance in making agro-practices more ecologically sound. Relevant pioneering efforts have been briefly reviewed, along with a discussion of perspectives on the potential of LDHs as green nanomaterials to improve food productivity with low eco-impacts.

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“…The interlamellar anions neutralize the positive charges in the main layer, contributing to the electrical neutrality of LDH [10] . The good properties of LDH, including adjustability, alkalinity, thermal stability, and memory effect, result from its unique lamellar structure, which also provides it with an excellent adsorption capacity [11] . Mg-Al-CO 3 LDH/Chitosan composite [12] synthesized by Ribeiro was efficient in phosphate removal.…”

Section: Introductionmentioning

confidence: 99%

Differential removal of tetracycline hydrochloride and quinolone antibiotics by calcined and uncalcined layered double hydroxides

Zhang¹,

García‐Meza²,

Li³

2023

Miner Miner Mater

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Antibiotics generally cause drug-resistant genes (ARGs) and drug-resistant bacteria (ARBs). With a complex class of antibiotics, it is very crucial to select specific adsorbents for different kinds of antibiotics. Zn-Al layered double hydroxide (LDH) and calcined layered double hydroxide (LDO) were prepared as absorbents for tetracycline hydrochloride (TCH) and ofloxacin (OFX), which were two antibiotics with different structures. According to the results of the adsorption experiments, LDO has the best adsorption capacity on TCH, reaching 322.58 mg/g. Acid-base titration, XRD, TEM, SEM, BET, and FI-TR analyses indicate that LDO has more active sites on the surface, the “memory effect”, and a larger specific surface area. In contrast, the removal rate of OFX by LDO is low because OFX has a more stable quinolone ring structure. Furthermore, after five adsorption-desorption cycles, the adsorption rate of TCH remains at 94.9%, demonstrating that LDO has good cyclic adsorption capacity for TCH. This study creatively combines acid-base buffering characteristics to study the mechanism of the adsorption of antibiotics by hydrotalcite, and proposes that LDO can be used as a special adsorbent for TCH.

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Efficient phosphate adsorption by a composite composed of Mg6Al2(CO3)(OH)16·4H2O LDH and Chitosan: kinetic, thermodynamic, desorption, and characterization studies

Cited by 25 publications

References 60 publications

Removal of Low-Concentration Phosphate Adsorption by La–Ca–CO₃ Material: Performance, Mechanism, and Applicability

Removal of Low-Concentration Phosphate Adsorption by La–Ca–CO₃ Material: Performance, Mechanism, and Applicability

Layered Double Hydroxides for Regulating Phosphate in Water to Achieve Long-Term Nutritional Management

Differential removal of tetracycline hydrochloride and quinolone antibiotics by calcined and uncalcined layered double hydroxides

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Efficient phosphate adsorption by a composite composed of Mg6Al2(CO3)(OH)16·4H2O LDH and Chitosan: kinetic, thermodynamic, desorption, and characterization studies

Cited by 25 publications

References 60 publications

Removal of Low-Concentration Phosphate Adsorption by La–Ca–CO3 Material: Performance, Mechanism, and Applicability

Removal of Low-Concentration Phosphate Adsorption by La–Ca–CO3 Material: Performance, Mechanism, and Applicability

Layered Double Hydroxides for Regulating Phosphate in Water to Achieve Long-Term Nutritional Management

Differential removal of tetracycline hydrochloride and quinolone antibiotics by calcined and uncalcined layered double hydroxides

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Removal of Low-Concentration Phosphate Adsorption by La–Ca–CO₃ Material: Performance, Mechanism, and Applicability

Removal of Low-Concentration Phosphate Adsorption by La–Ca–CO₃ Material: Performance, Mechanism, and Applicability