Box–Behnken design, kinetic, and isotherm models for oxytetracycline adsorption onto Co-based ZIF-67

Nguyen, Duyen Thi Cam; Vo, Dai‐Viet N.; Nguyen, Chi Ngoc Quynh; Pham, Le Hoang Ai; Le, Hanh T.N.; Nguyen, Thuong Thi; Tran, Thuan Van

doi:10.1007/s13204-021-01954-w

Cited by 25 publications

(7 citation statements)

References 73 publications

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“…The higher correlation coefficient ( R 2 = 0.96) indicates that the adsorption sites in CHSC are not uniform. However, the fitting results of the intraparticle diffusion model for the adsorption process were poor ( R 2 = 0.703), which indicated that the diffusion of gold ions at the CHSC interface was not the main factor controlling the adsorption process . According to the BET characterization results, the pore structure of CHSC is not well developed, so the adsorption process is less affected by diffusion in the interface.…”

Section: Resultsmentioning

confidence: 96%

“…However, the fitting results of the intraparticle diffusion model for the adsorption process were poor (R 2 = 0.703), which indicated that the diffusion of gold ions at the CHSC interface was not the main factor controlling the adsorption process. 43 According to the BET characterization results, the pore structure of CHSC is not well developed, so the adsorption process is less affected by diffusion in the interface. The adsorption isotherms of Au(S 2 O 3 ) 2 3− adsorbed by CHSC for gold concentrations in the range of 10−80 mg/L at 25, 35, 45, and 55 °C were studied using the Langmuir (eq 6),…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Selective Reduction of Au(I) from a High-Concentration Thiosulfate Solution for Gold Recovery Using One-Step Heat-Treated High-Sulfur Coal

Nie

Chen

Wang

et al. 2022

ACS Sustainable Chem. Eng.

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It is challenging to economically, efficiently, and selectively recover Au(S 2 O 3 ) 2 3− from thiosulfate gold leaching solutions. This article reports an approach to effectively recover Au(S 2 O 3 ) 2 3− using a toxic material, high-sulfur coal (HSC). Calcined HSC (CHSC) obtained through the onestep calcination of HSC in an inert environment can effectively adsorb Au(S 2 O 3 ) 2 3− present in a high-concentration thiosulfate solution. While the adsorption process is dominated by chemical adsorption, the optimization of the adsorption conditions of Au(S 2 O 3 ) 2 3− suggested that pH and the concentration of thiosulfate can also exert influence on the adsorption process. The adsorption of Au(S 2 O 3 ) 2 3− by CHSC followed the Langmuir isotherm model, and the high correlation coefficient suggested that the reaction followed pseudo-second-order kinetics. X-ray diffraction (XRD) was conducted to characterize the phases of HSC before and after calcination. The XRD results indicated that the main phase of HSC changed from FeS 2 (pyrite) to Fe 8 S 9 (pyrrhotite) after calcination. The Fermi level and surface charge density of Fe 8 S 9 were greater than those of FeS 2 , which facilitated the extraction of electrons from the surface of Fe 8 S 9 during the reduction of Au(I). As a result of the formation of Fe 8 S 9 , the open-circuit potential is reduced from 0.08 V (HSC) to −0.023 V (CHSC). As such, CHSC has a greater reducing capability, which gives rise to the reduction of Au(I) present in the solution to elemental gold. These results were confirmed using an X-ray photoelectron spectrometer. This study not only converted toxic HSC to a valuable material but also provided a new method to adsorb Au(S 2 O 3 ) 2 3− from thiosulfate leaching solutions.

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Section: Resultsmentioning

confidence: 96%

Section: ■ Results and Discussionmentioning

confidence: 99%

Selective Reduction of Au(I) from a High-Concentration Thiosulfate Solution for Gold Recovery Using One-Step Heat-Treated High-Sulfur Coal

Nie

Chen

Wang

et al. 2022

ACS Sustainable Chem. Eng.

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“…Therefore, the treatment of antibiotic pharmaceuticals from water media by effective methods is necessarily required. Considering the non-degradable and chemically stable structure of antibiotics, adsorption may be the best remediation method due to its enormous advantages including high efficiency, fast kinetic, and tunable procedure (Tran et al 2019b , 2020d , b ; Dang et al 2021 ; Nguyen et al 2021e ). However, the selection and development of novel advanced materials for water treatment are still challenging.…”

Section: Applications Of Green Zro 2 Nanoparticlesmentioning

confidence: 99%

Green synthesis of ZrO2 nanoparticles and nanocomposites for biomedical and environmental applications: a review

et al. 2022

Self Cite

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Pollution and diseases such as the coronavirus pandemic (COVID-19) are major issues that may be solved partly by nanotechnology. Here we review the synthesis of ZrO 2 nanoparticles and their nanocomposites using compounds from bacteria, fungi, microalgae, and plants. For instance, bacteria, microalgae, and fungi secret bioactive metabolites such as fucoidans, digestive enzymes, and proteins, while plant tissues are rich in reducing sugars, polyphenols, flavonoids, saponins, and amino acids. These compounds allow reducing, capping, chelating, and stabilizing during the transformation of Zr 4+ into ZrO 2 nanoparticles. Green ZrO 2 nanoparticles display unique properties such as a nanoscale size of 5–50 nm, diverse morphologies, e.g. nanospheres, nanorods and nanochains, and wide bandgap energy of 3.7–5.5 eV. Their high stability and biocompatibility are suitable biomedical and environmental applications, such as pathogen and cancer inactivation, and pollutant removal. Emerging applications of green ZrO 2 -based nanocomposites include water treatment, catalytic reduction, nanoelectronic devices, and anti-biofilms.

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“…ZIF-67 is a porous material, with CO 2+ and 2-methylimidazole acting as the central metal ion and organic ligand, respectively [43,44]. Previous research has demonstrated that ZIF-67 could effectively adsorb and remove pollutants (e.g., organic pollutants, heavy metals, and antibiotics) from water through interface forces, including hydrogen bonding, electrostatic action, and π-π stacking [39,[45][46][47]. However, very few studies have focused on the capacity of ZIF-67 to remove PSMPs from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Removal of Polystyrene Microplastics from Aqueous Solution Using the Metal–Organic Framework Material of ZIF-67

Wan

Wang

Sheng

et al. 2022

Toxics

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Due to the continuous and adverse effects of microplastics on the environment, an increasing number of studies have begun to focus on their migration patterns and removal from aquatic environments. Herein, our study innovatively evaluated the ability of the capacity of ZIF-67, a novel metal–organic framework (MOF) material, to adsorb polystyrene (PS) microplastics (MPs) from aqueous solutions, aiming to explore the potential of MOF materials to remove MPs from wastewater. The adsorption ratio of PSMPs (5 mg/L, 30 mL) by ZIF-67 reached up to 92.1%, and the PSMP adsorption equilibrium was achieved within 20 min at 298 K. The adsorption of PSMPs would be favored at a pH of 8, a PSMPs solution concentration of 5 mg/L, and a temperature of 298 K. Further analyses demonstrated that hydrogen bond interactions, π-π stacking, and electrostatic interactions played a crucial role in the adsorption of PSMPs by ZIF-67 in aqueous solutions. Our findings thus provide insight into novel methods to remove MPs from acidic and weakly alkaline aquatic environments and wastewater.

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Box–Behnken design, kinetic, and isotherm models for oxytetracycline adsorption onto Co-based ZIF-67

Cited by 25 publications

References 73 publications

Selective Reduction of Au(I) from a High-Concentration Thiosulfate Solution for Gold Recovery Using One-Step Heat-Treated High-Sulfur Coal

Selective Reduction of Au(I) from a High-Concentration Thiosulfate Solution for Gold Recovery Using One-Step Heat-Treated High-Sulfur Coal

Green synthesis of ZrO2 nanoparticles and nanocomposites for biomedical and environmental applications: a review

Removal of Polystyrene Microplastics from Aqueous Solution Using the Metal–Organic Framework Material of ZIF-67

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