Facile preparation and characterization of lanthanum-loaded carboxylated multi-walled carbon nanotubes and their application for the adsorption of phosphate ions

Zong, Enmin; Liu, Xiaohuan; Wang, Jifu; Yang, Shenxiang; Jiang, Jiulei; Fu, Shenyuan

doi:10.1007/s10853-017-0966-0

Cited by 66 publications

(23 citation statements)

References 53 publications

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“…The interaction between ENR and the surface active sites of Tb or Eu might involve the valence forces through the electrons or ligand exchange, , which were different from the hydrogen-binding interaction between fluorine in ENR and the surface −COOH groups of HNO 3 -GP . Similar results of adsorption kinetic studies could be found in several previous works. − …”

Section: Resultssupporting

confidence: 77%

Renewable Tb/Eu-Loaded Garlic Peels for Enhanced Adsorption of Enrofloxacin: Kinetics, Isotherms, Thermodynamics, and Mechanism

Zhao¹,

Li²,

Liu

et al. 2018

ACS Sustainable Chem. Eng.

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Environmentally friendly terbium, europium, and terbium/europium-loaded garlic peels (Tb@GP, Eu@GP, and Tb/Eu@GP) were successfully synthesized and evaluated as biosorbents for the extraction of enrofloxacin (ENR) from aqueous solutions. Notably, it was found that the adsorption capacity of Tb/Eu@GP (769 mg g −1 ) for enrofloxacin was significantly enhanced compared with unloaded GP (29.8 mg g −1 ) and was superior over Tb@GP (580 mg g −1 ) and Eu@ GP (421 mg g −1 ). The high adsorption capacity of Tb/Eu@ GP reflected the efficiency and cost effectiveness of the adsorption process. In order to gain insight into the modification method and adsorption behaviors, Tb@GP, Eu@GP, and Tb/Eu@GP were fully characterized, and their adsorption kinetics, isotherms, and thermodynamics were investigated. Additionally, Tb/Eu@GP was found to be highly efficient at pH values ranging from 6.0 to 8.0. Besides, ultrapure water containing 5% ammonia could elute 98.1 ± 1.5% of the absorbed ENR from Tb/Eu@GP, and the reusability and regeneration test also revealed the sustainability of Tb/Eu@GP. Moreover, XPS analysis confirmed ligand exchange between the hydroxyl and the fluorine group of enrofloxacin might be the main mechanism in the adsorption process. This work demonstrated loading terbium and europium on agricultural byproduct could be a potential method for developing costeffective and eco-friendly biosorbents for fluoroquinolones.

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Section: Resultssupporting

confidence: 77%

Renewable Tb/Eu-Loaded Garlic Peels for Enhanced Adsorption of Enrofloxacin: Kinetics, Isotherms, Thermodynamics, and Mechanism

Zhao¹,

Li²,

Liu

et al. 2018

ACS Sustainable Chem. Eng.

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“… 21 , 22 Current examples include compositing lanthanum compounds (e.g., La(OH) 3 ) with supporting matrixes (e.g., carbon nanotubes, biochar, or anion-exchange resins). 5 , 23 − 25 However, simply transferring this strategy may not be suitable for modifying SH. The reasons are mainly twofold.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Phosphate Adsorption of a Polyallylamine Resin in Alkaline Environments by Lanthanum Oxalate Modification

Chen

et al. 2022

ACS Omega

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Sevelamer hydrochloride (SH), originally developed as an oral pharmaceutical for controlling blood phosphate levels, is a polyallylamine resin that could be used in water treatments. Although it binds phosphates effectively, its adsorption capacity suffers from a significant loss at high pH. Here, we modify SH with lanthanum oxalate to improve its phosphate adsorption in alkaline environments. With less than 6.00 wt% in La content, the composite adsorbent (SH-1C-1La) exhibits an adsorption capacity of 109.3 mg P g –1 at pH 8.0 and 100.2 mg P g –1 at pH 10.0, demonstrating significant enhancement from the original SH (86.3 mg P g –1 at pH 8.0 and 69.4 mg P g –1 at pH 10.0). Besides its high adsorption capacity and rapid adsorption kinetics, SH-1C-1La is capable of maintaining more than 78% of its capacity after four regeneration cycles, showing good durability in long-term applications. Zeta-potential measurements and XPS analysis reveal that the lanthanum oxalate species increase the surface potential to enhance the electrostatic adsorption while introducing chemical binding sites for phosphate ions. Both factors lead to the improved adsorption properties. The modification by lanthanum oxalate species might provide a new alternative for improving the phosphate adsorption properties of anion-exchange resins.

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“…Currently, many conventional strategies such as chemical precipitation, biological removal, electrochemical treatment, and adsorption, have been proven effective for removing phosphate from wastewater. 3 Nevertheless, these methods suffer from certain drawbacks such as high cost and energy consumption and the requirement of a large number of chemicals, which can lead to the generation of sludge and secondary pollution. 4 Thus, it is important to explore a more effective, sustainable, and inexpensive method for removing phosphate from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Cerium oxide nanoparticle functionalized lignin as a nano-biosorbent for efficient phosphate removal

Liu

Zhang

et al. 2020

RSC Adv.

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Removing excess phosphorus is a highly effective method to prevent eutrophication in contaminated water.However, the design and preparation of an efficient biosorbent for phosphate capture is still a great challenge. We fabricated a novel, and inexpensive nano-biosorbent, L-NH 2 @Ce, by loading cerium oxide nanoparticles (nano-CeO 2 ) within the aminated lignin using a facile in situ precipitation approach for efficient phosphate removal. The as-designed nano-biosorbent L-NH 2 @Ce exhibited a BET surface area (S BET ) of 89.8 m 2 g À1 , 3 times that of lignin, and a pore volume (V p ) of 0.23 cm 3 g À1 . Owing to these results, the adsorption capacity of L-NH 2 @Ce increased by 14-fold to 27.86 mg g À1 compared with lignin (1.92 mg g À1 ). Moreover, the L-NH 2 @Ce can quickly reduce a high phosphate concentration of 10 ppm to well below the discharge standard of 0.5 ppm recommended by the World Health Organization (WHO) for drinking water. Importantly, a study of leaching tests indicated the negligible risk of Ce ion leakage during phosphate adsorption over the wide pH range of 4-9. Moreover, L-NH 2 @Ce exhibits good reusability and retains 90% of removal efficiency after two adsorption-desorption cycles.The environmentally benignity of the raw material, the simple preparation process, and the high stability and reusability makes L-NH 2 @Ce a promising nano-biosorbent for phosphate removal. † Electronic supplementary information (ESI) available: The phosphate adsorption capacity of L-NH 2 @Ce in comparison with some biosorbents. See Fig. 3 (a) Adsorption kinetics of phosphate on L-NH 2 @Ce, and fitting results for (b) pseudo-second-order model and (c) pseudo-first-order model on L-NH 2 @Ce. 1254 | RSC Adv., 2020, 10, 1249-1260 This journal is

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Facile preparation and characterization of lanthanum-loaded carboxylated multi-walled carbon nanotubes and their application for the adsorption of phosphate ions

Cited by 66 publications

References 53 publications

Renewable Tb/Eu-Loaded Garlic Peels for Enhanced Adsorption of Enrofloxacin: Kinetics, Isotherms, Thermodynamics, and Mechanism

Renewable Tb/Eu-Loaded Garlic Peels for Enhanced Adsorption of Enrofloxacin: Kinetics, Isotherms, Thermodynamics, and Mechanism

Enhancing the Phosphate Adsorption of a Polyallylamine Resin in Alkaline Environments by Lanthanum Oxalate Modification

Cerium oxide nanoparticle functionalized lignin as a nano-biosorbent for efficient phosphate removal

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