An achieved strategy for magnetic biochar for removal of tetracyclines and fluoroquinolones: Adsorption and mechanism studies

Zhang, Xianzhao; Zhen, Dawei; Liu, Fengmao; Chen, Rui; Peng, Qiyu; Wang, Zongyi

doi:10.1016/j.biortech.2022.128440

Cited by 62 publications

(10 citation statements)

References 43 publications

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“…The NH and CNC bonds in the N 1s spectrum shifted from 399.57 and 401.63 to 399.63 and 402.12 eV, respectively, and the CO and CO bonds in the O 1 s spectrum shifted from 532.21 and 533.68 to 532.52 and 533.91 eV, respectively. These shifts and increased binding energy indicate that COOH‐HCPs also undergoes the π‐π conjugated effect between aromatic rings, H‐bonding, and electrostatic interactions during DOX adsorption, similar to NH‐HCPs and NH 2 ‐HCPs 54–56 . However, the difference lies in COOH‐HCPs possessing both nitrogen‐containing and oxygen‐containing groups, which can interact with DOX in three different modes, leading to a combination of similar actions as in the previous cases (Figure 8b).…”

Section: Resultsmentioning

confidence: 67%

“…These shifts and increased binding energy indicate that COOH-HCPs also undergoes the π-π conjugated effect between aromatic rings, H-bonding, and electrostatic interactions during DOX adsorption, similar to NH-HCPs and NH 2 -HCPs. [54][55][56] However, the difference lies in COOH-HCPs possessing both nitrogen-containing and oxygen-containing groups, which can interact with DOX in three different modes, leading to a combination of similar actions as the previous cases (Figure 8b).…”

Section: Molecular Simulationmentioning

confidence: 99%

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Adsorption behaviors and mechanisms of porous hypercrosslinked polymers with adjustable functional groups toward doxycycline hydrochloride from water

Guo,

Chen,

et al. 2023

J of Applied Polymer Sci

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Imino hypercrosslinked polymers (NH‐HCPs), amino hypercrosslinked polymers (NH2‐HCPs), and carboxyl hypercrosslinked polymers (COOH‐HCPs) were synthesized through cross‐linking and Friedel‐Crafts reactions to serve as highly efficient adsorbents for doxycycline hydrochloride (DOX) in water. These polymers, NH‐HCPs, NH2‐HCPs, and COOH‐HCPs, exhibited specific surface areas measuring 450, 267.576, and 94.39 m2/g, respectively. The adsorption kinetics of DOX onto these polymers were consistent with the pseudo‐second‐order model, while the adsorption isotherms followed the Langmuir model (NH‐HCPs) and Freundlich model (NH2‐HCPs and COOH‐HCPs), respectively. The maximum DOX adsorption capacities for NH‐HCPs, NH2‐HCPs, and COOH‐HCPs were 166.82, 132.43, and 72.07 mg/g, respectively. Simulation results indicated that COOH‐HCPs exhibited the strongest adsorption capability due to a substantial presence of oxygen and nitrogen groups on its surface, enabling the formation of hydrogen bonds with DOX. However, its actual adsorption capacity was the lowest among the polymers, indicating that structural adjustments played a more significant role in improving adsorption performance compared to functional adjustments. Adsorption experiments conducted with NH‐HCPs and NH2‐HCPs further supported this hypothesis. The primary DOX adsorption mechanism of NH‐HCPs, NH2‐HCPs, and COOH‐HCPs involved the H‐bonding of oxygen and nitrogen functional groups, along with other mechanisms such as π‐π conjugated effects, pore‐filling effects, electrostatic interactions, and acid–base interactions. Overall, this study demonstrates the effectiveness of NH‐HCPs, NH2‐HCPs, and COOH‐HCPs in DOX removal from water, highlighting the significant influence of structural adjustments on adsorption performance.

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Section: Resultsmentioning

confidence: 67%

Section: Molecular Simulationmentioning

confidence: 99%

Adsorption behaviors and mechanisms of porous hypercrosslinked polymers with adjustable functional groups toward doxycycline hydrochloride from water

Guo,

Chen,

et al. 2023

J of Applied Polymer Sci

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“…Analysis of the C 1s peak-fitting results indicates that the C 1s spectrum can be deconvoluted into three peaks centered at 284.8, 285.9, and 288.5 eV, which correspond to C–C/C–H, C–O, and O–C=O, respectively . Similarly, the O 1s spectrum can also be deconvoluted into three peaks centered at 531.1, 532.3, and 533.7 eV, which correspond to −OH, C–C=O, and C–O–C, respectively …”

Section: Resultsmentioning

confidence: 99%

Temperature-Dependent Adsorption Process of Neonicotinoid Insecticide Nitenpyram by Sawdust Biochar: Mechanism and Theoretical Simulation

Yang,

Wan,

Wang

et al. 2023

ACS Agric. Sci. Technol.

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Agricultural waste reduction was significant for the novel pathways of "waste control by control" and "synergize the reduction of pollution and carbon emissions". This study explores the utilization of crop waste through the preparation of sawdust biochar (SBC) via high-temperature pyrolysis for the adsorption removal of the neonicotinoid insecticide nitenpyram (NTP). A comprehensive characterization of SBC's physicochemical properties was conducted using various techniques such as scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, Brunauer−Emmett−Teller analysis, Fourier-transform infrared spectroscopy, thermogravimetric analysis, Raman spectroscopy, zeta potential analysis, and X-ray photoelectron spectroscopy. The sample subjected to pyrolysis at 900 °C with a particle size range of 75−150 μm (BC900M) exhibited an organized porous structure with a high specific surface area of 682.7 m 2 /g and an abundance of surface active groups and oxygencontaining functional groups. At optimal conditions (NTP concentration = 150 mg/L and BC900M dosage = 0.3 g/L), BC900M demonstrated a notable adsorption capacity of 115 mg/g. The NTP adsorption behavior aligned with the Langmuir and Freundlich isotherm models (R 2 > 0.96), the pseudo-second-order kinetics model, ΔH = 40.04 kJ•mol −1 and ΔS = 0.219 kJ•K −1 •mol −1 , indicating a spontaneous and endothermic physical process involving both monolayer and multimolecular adsorption. The mechanisms encompassed micropore trapping, hydrogen-bond interactions, electrostatic attraction, π−π interactions, halogen bonding, and coordination interaction. Furthermore, a positive correlation between the adsorption performance of biochar and the pyrolysis temperature was observed, which was attributed to the decreased degree of graphitization of SBC based on the I D /I G ratios of BC300, BC500, BC700, and BC900 of 0.96, 1.01, 1.06, and 1.11, respectively. The adsorption free energy between NTP and SBC was −8.05, −8.31, −8.61, and −9.23 eV for BC300, BC500, BC700, and BC900, respectively. Those findings provide important insights for the efficient utilization of biomass resources for organic pollutant removal via high-performing adsorbents.

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“…The oxygen‐containing functional groups on biochar surfaces play a significant role in adsorbing antibiotic molecules. [ 13 ] Hydrogen bonding influences adsorption efficiency and stability. [ 14 ] In addition, different modification methods have been explored to increase the density of surface functional groups of adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Functionalized typha biochar for antibiotic removal via low‐carbon integrated method: Performance and mechanism analyses

Liu,

Wen,

et al. 2024

CLEAN Soil Air Water

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Antibiotic residues in water represent an urgent environmental challenge. To efficiently remove these residues, a low‐carbon integrated biochar synthesis method was proposed, and an optimized typha biochar (TBIK) was prepared. Compared with the biochar prepared by a conventional two‐step carbonization and activation method (TBTK), the TBIK preparation process reduced energy consumption by 43849.58 J and cut carbon dioxide emissions by 32.80%. TBIK exhibited a large surface area of 1252.40 m2/g and rapidly achieved an equilibrium removal efficiency of 99.95% within 20 min for simulated antibiotics wastewater. Furthermore, TBIK possessed more number of functional groups than TBTK, especially O‐H and C‐S groups. The adsorption stability and tolerance of TBIK in solutions with different ionic strengths and coexisting anions were examined. Characterization techniques such as scanning electron microscopy (SEM), Fourier transform infrared (FT‐IR), and X‐ray photoelectron spectroscopy (XPS) as well as Brunauer, Emmett and Teller (BET) analyses were employed to elucidate the morphology and adsorption mechanism of the adsorbent. The microporous structure and abundance of functional groups are key to the excellent adsorption capabilities of TBIK. Thus, this integrated method for biochar production, optimized for treating antibiotic wastewater, holds significant potential for future applications.

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An achieved strategy for magnetic biochar for removal of tetracyclines and fluoroquinolones: Adsorption and mechanism studies

Cited by 62 publications

References 43 publications

Adsorption behaviors and mechanisms of porous hypercrosslinked polymers with adjustable functional groups toward doxycycline hydrochloride from water

Adsorption behaviors and mechanisms of porous hypercrosslinked polymers with adjustable functional groups toward doxycycline hydrochloride from water

Temperature-Dependent Adsorption Process of Neonicotinoid Insecticide Nitenpyram by Sawdust Biochar: Mechanism and Theoretical Simulation

Functionalized typha biochar for antibiotic removal via low‐carbon integrated method: Performance and mechanism analyses

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