Nitrogen-rich hierarchical porous polyphosphazene for rapid and efficient adsorption of anionic contaminants: Kinetics, isotherm, thermodynamics and mechanism

Liu, Haowei; Zhang, Xiaofan; Hou, Lumiao; Zheng, He; Niu, Bolin; Weng, Kangrong; Liu, Shaohua; Fu, Jianwei

doi:10.1016/j.apsusc.2023.156538

Cited by 11 publications

(2 citation statements)

References 61 publications

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“…The R 2 values for the Pseudo‐First Order and Langmuir models were found to be the highest among the tested models, indicating a good fit to the experimental data. The high R 2 value in Pseudo‐first‐order suggests that the DCF adsorption process may involve a mechanism where the adsorption rate is directly proportional to the number of available adsorption sites on the adsorbent surface (Liu et al., 2023; Sharma et al., 2023). The Langmuir model's high R 2 value suggests monolayer adsorption with a finite number of identical sites on the adsorbent surface.…”

Section: Resultsmentioning

confidence: 99%

Effect of oxidated golden shower on the adsorption of diclofenac sodium in wastewater

Arliyani,

Syaifuddin,

Ni'am

et al. 2023

Environmental Quality Mgmt

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This research aimed to modify activated carbon into oxidated activated carbon because it can effectively remove diclofenac sodium (DCF) and increase the adsorption capability. In this study of the several variations of initial concentration and contact time, those variations affected the optimal result. To determine, the removal efficiency of diclofenac sodium used Golden Shower Activated Carbon based on the contact time variation and the optimum contact time compared to Golden Shower Oxidated Activated Carbon as adsorbent on the batch method and to know the isotherm model and the kinetic model of the adsorbent on the adsorption in diclofenac sodium solution. The pHPZC for GSHAC and GSHOAC were 2.4 and 9.3. The optimum contact time for GSHAC was 225 min with the capacity (qt = 184.71 mg/g). The optimum contact time for GSHOAC was 169 min with the capacity (qt = 188.34 mg/g). The Isotherm model, kinetics model, and the physical characterization of the biosorbent were thoroughly investigated. The isotherm model chosen in the adsorption process for GSHAC and GSHOAC was the Langmuir model (R2 = 0.985 and R2 = 0.973). The pseudo‐second‐order for GSHAC and GSHOAC was confirmed to be a kinetic pseudo‐second‐order model of the adsorption with R2 values of 0.9566 and 0.9986. The model represents that the reaction from the adsorbent to the solution was double the initial concentration. Based on SEM analysis after the adsorption process, it was found that flakes of adsorbent before adsorption had many layers of pores, causing an irregular texture after adsorption showed that GSHAC and GSHOAC were fragmented and had many layers of pores that were closed and tight because it adsorbed DCF.

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Section: Resultsmentioning

confidence: 99%

Effect of oxidated golden shower on the adsorption of diclofenac sodium in wastewater

Arliyani,

Syaifuddin,

Ni'am

et al. 2023

Environmental Quality Mgmt

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“…However, as adsorption progressed, the rate gradually declined because the adsorption sites were occupied [10], reaching dynamic equilibrium after 60 min. Additionally, the q e values increased with increasing initial concentration of MB solution (c 0 ) (Figure 5c), as higher concentrations created greater driving forces from the concentration gradient [46]. The adsorption temperature also influenced the adsorption reactions and equilibrium capacity [47].…”

Section: Adsorption Performance Of N Self-doped Porous Carbons Toward...mentioning

confidence: 94%

Zanthoxylum bungeanum Waste-Derived High-Nitrogen Self-Doped Porous Carbons as Efficient Adsorbents for Methylene Blue

Zhao,

Zhang,

Gong

et al. 2024

Molecules

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In this study, we prepared high-nitrogen self-doped porous carbons (NPC1 and NPC2) derived from the pruned branches and seeds of Zanthoxylum bungeanum using a simple one-step method. NPC1 and NPC2 exhibited elevated nitrogen contents of 3.56% and 4.22%, respectively, along with rich porous structures, high specific surface areas of 1492.9 and 1712.7 m2 g−1 and abundant surface groups. Notably, both NPC1 and NPC2 demonstrated remarkable adsorption abilities for the pollutant methylene blue (MB), with maximum monolayer adsorption capacities of 568.18 and 581.40 mg g−1, respectively. The adsorption kinetics followed the pseudo-second-order kinetics and the adsorption isotherms conformed to the Langmuir isotherm model. The adsorption mechanism primarily relied on the hierarchical pore structures of NPC1 and NPC2 and their diverse strong interactions with MB molecules. This study offers a new approach for the cost-effective design of nitrogen self-doped porous carbons, facilitating the efficient removal of MB from wastewater.

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Reconstruction of Metal Ions Extracted from Coal Gangue to Synthesize Cost‐effective Adsorbent for Highly Efficient Removal of Pollutants

Zhao

Zhang

Feng

et al. 2023

Chemistry An Asian Journal

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An emerging "one stone, three birds" strategy was proposed to realize the value-added disposal of solid waste coal gangue (CG), the synthesis of superb adsorbent and the efficient decontamination of pollutants (i. e., dyes, heavy metals). In this process, the metal ions extrated from calcined coal gangue (CCG) was reconstituted by a one-step hydrothermal process to yield porous polymetallic silicate adsorbent (named HECCGA8h). The adsorbent has a high adsorption capacity of 270.27 and 185.53 mg/g for methylene blue (MB) and Cd(II), respectively. In the actual waters, the removal rate of MB by this adsorbent reaches 99.8% (in Yangtze River water) and 99.42% (in Seawater), and the removal rate of Cd(II) reaches 99.11% (in Yangtze River water) and 92.52% (in Seawater), respectively. Thermokinetic analysis showed that the adsorption of MB by HECCGA8h is spontaneous and endothermic with increased entropy, and the adsorption of Cd(II) is spontaneous and exothermic. The adsorption of MB is mainly driven by synergism of hydrogen bond, electrostatic attraction and ion exchange, and the adsorption of Cd(II) is mainly driven by the complexation and ion exchange between the surface group of the adsorbent and Cd(II). This research provides a new way for the realization of "treating waste with waste".

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Nitrogen-rich hierarchical porous polyphosphazene for rapid and efficient adsorption of anionic contaminants: Kinetics, isotherm, thermodynamics and mechanism

Cited by 11 publications

References 61 publications

Effect of oxidated golden shower on the adsorption of diclofenac sodium in wastewater

Effect of oxidated golden shower on the adsorption of diclofenac sodium in wastewater

Zanthoxylum bungeanum Waste-Derived High-Nitrogen Self-Doped Porous Carbons as Efficient Adsorbents for Methylene Blue

Reconstruction of Metal Ions Extracted from Coal Gangue to Synthesize Cost‐effective Adsorbent for Highly Efficient Removal of Pollutants

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