A new mesoporous activated carbon as potential adsorbent for effective indium removal from aqueous solutions

Díez, Eduardo; Gómez, J. M. G.; Rodrı́guez, A.; Bernabé, Ignacio; Sáez, Patricia; Galán, J.

doi:10.1016/j.micromeso.2019.109984

Cited by 37 publications

(8 citation statements)

References 32 publications

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“…Therefore, in order to prevent the precipitation of indium, the maximum pH value for adsorbing indium was set to 3.5. 30–32 where C 0 (mg L −1 ) is the initial concentration of metal ions in solution, C e (mg L −1 ) is the equilibrium concentration of metal ion solution, V (L) is the volume of metal ion solution, and m (g) is the mass of adsorbents.…”

Section: Methodsmentioning

confidence: 99%

Activated carbon fiber modified with hyperbranched polyethylenimine and phytic acid for the effective adsorption and separation of In(iii)

Gao

Cao

et al. 2022

New J. Chem.

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Section: Methodsmentioning

confidence: 99%

Activated carbon fiber modified with hyperbranched polyethylenimine and phytic acid for the effective adsorption and separation of In(iii)

Gao

Cao

et al. 2022

New J. Chem.

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“…The adsorption media in these experiments were constituted by a concentration of 25 mM of added salts (NaCl, CaCl 2 , and KCl) combined with 40 mg/L (0.5 mM) of Ga 3+ . The concentration of the added salts was studied in a previous work [42]. The results obtained are shown in Fig.…”

Section: Competitive Cations Addition Influencementioning

confidence: 97%

H-Clinoptilolite as an Efficient and Low-Cost Adsorbent for Batch and Continuous Gallium Removal from Aqueous Solutions

Sáez

Rodrı́guez

Gómez

et al. 2021

J. Sustain. Metall.

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In this paper, the gallium (III) ions’ adsorption onto protonated clinoptilolite (H-CLP) was investigated both in batch and fixed-bed column experiments. Regarding batch experiments, the influence of some parameters such as adsorbent dosage, size particle, and temperature was studied, determining that a dosage of 10 g/L for an initial pollutant concentration of 40 mg/L leads to a removal percentage over 85% regardless of particle size and temperature. On the other hand, adsorption of gallium onto H-CPL is an endothermic and spontaneous process in the studied temperature range, concluding that the maximum adsorption capacity was 16 mg/g for 60 °C. Concerning to the effect of the presence of other cations in solution, such as Na+, K+, or Ca2+, gallium adsorption capacity only drops by 20%, although the initial concentration of other cations in the solution is 50 times higher than gallium concentration. This means that clinoptilolite has a high affinity for gallium which can be very favorable for further selectivity tests. A crucial factor for this high selectivity could be the protonation of clinoptilolite which allows working without modifying the pH of the aqueous solution with acid. In the fixed-bed experiments, breakthrough curves were obtained, and the effect of operation variables was determined. A breakpoint value of 254 min for 64 g of adsorbent and flow rate of 9.0 mL/min (7.0 BV/h) were obtained, when treating a pollutant volume of 33 BV. Additionally, the breakthrough curves were fitted to different models to study the particle size effect, being the best fit corresponding to the Adams–Bohart model. This fact confirmed the influence of particle size on adsorption kinetics. Graphical Abstract

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“…The isotherm curve showed that the amount of N 2 adsorbed was larger at a higher relative pressure (P/P 0 ). The International Union of Pure and Applied Chemistry (IUPAC) classification presents a type IV BET adsorption isotherm with an H-2 hysteresis cycle, both of which are typical of mesoporous materials (Díez et al 2020). Furthermore, mesopores are typically responsible for the adsorption and confinement of adsorbate molecules (Thaveemas et al 2021).…”

Section: Materials Characterizationmentioning

confidence: 99%

Porous carbon aerogel derived from bacterial cellulose with prominent potential for efficient removal of antibiotics from the aquatic matrix

Wei

Zheng

Zeng

et al. 2021

Water Science and Technology

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The development of adsorption methods for the remediation of antibiotics pollution in water is hindered by the lack of high-performance sorbents. In this study, a nanofiber carbon aerogel was prepared using bacterial cellulose and its adsorption performances for three common antibiotics (norfloxacin, sulfamethoxazole, and chloramphenicol) in water were evaluated. The as-prepared nanofiber carbon aerogel showed a higher adsorption capacity toward target antibiotics compared to other adsorbents reported in the literature. The maximum adsorption capacities for norfloxacin, sulfamethoxazole, and chloramphenicol were 1,926, 1,264, and 525 mg/g, respectively at 298 K. Notably, the nanofiber carbon aerogel was able to adsorb 80% of the equilibrium adsorption capacity within 1 min and reach equilibrium within 15 min. After five regeneration cycles, the adsorption capacity still reached 1,166, 847, and 428 mg/g for norfloxacin, sulfamethoxazole, and chloramphenicol, respectively. The characterization results showed that the carbon aerogel exhibited a high specific surface area (1,505 m2/g) and a layered porous network structure. Furthermore, the mechanistic study reveals that the enhanced antibiotic adsorption by the as-prepared nanofiber carbon aerogel was attributed to the pore filling effect, hydrogen bonding, hydrophobic effect, electrostatic interaction, and π-π interactions. Overall, these results imply that low-cost and green nanofiber carbon aerogels may be promising adsorbents for the remediation of antibiotic-contaminated wastewater. The materials prepared from natural and readily available bacterial cellulose can adsorb antibiotics efficiently, which provides a reference for the development of adsorbent materials using natural substances.

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A new mesoporous activated carbon as potential adsorbent for effective indium removal from aqueous solutions

Cited by 37 publications

References 32 publications

Activated carbon fiber modified with hyperbranched polyethylenimine and phytic acid for the effective adsorption and separation of In(iii)

Activated carbon fiber modified with hyperbranched polyethylenimine and phytic acid for the effective adsorption and separation of In(iii)

H-Clinoptilolite as an Efficient and Low-Cost Adsorbent for Batch and Continuous Gallium Removal from Aqueous Solutions

Porous carbon aerogel derived from bacterial cellulose with prominent potential for efficient removal of antibiotics from the aquatic matrix

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