Highly dispersed iron-doped biochar derived from sawdust for Fenton-like degradation of toxic dyes

Wang, Chongqing; Sun, Ruirui; Huang, Rong

doi:10.1016/j.jclepro.2021.126681

Cited by 108 publications

(30 citation statements)

References 58 publications

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“…The improved MB degradation associated with catalyst dosage was reported by Qin et al (2018). The improvement of MB removal with increasing Cu-C 3 N 4 is due to introducing more active sites, benefiting the generation of radical species that promote the degradation reactions (Wang et al 2021b). MB removal is not further enhanced with excessive catalyst, probably because of particles agglomeration of catalyst and undesirable scavenging radicals (Qin et al 2018).…”

Section: Effect Of Catalyst Dosagementioning

confidence: 84%

“…MB removal is ineffective in the absence of H 2 O 2 (Fig. S6), implying poor adsorption ability of Cu-C 3 N 4 and minor effect of ultrasound (Wang et al 2020a(Wang et al , 2021b. MB removal is sharply promoted in the presence of 10 mM H 2 O 2 .…”

Section: Effect Of H 2 O 2 Concentrationmentioning

confidence: 97%

“…The removal is approximate 80% at 90 min under oscillation, while it reaches above 90% at 40 min assisted by ultrasound. The pseudo first-order model has been extensively reported for studying the kinetics of Fenton-like processes (Wang et al 2021b). Linear fitting of the model offers the apparent rate constant of pseudo first-order kinetics.…”

Section: Effect Of Catalyst Dosagementioning

confidence: 99%

“…In the presence of excessive H 2 O 2 , MB removal is minorly improved. This can be attributed to the undesirable scavenging reactions (Equations ( 5) and ( 6)) (Liu et al 2020b;Wang et al 2021b). Additionally, excessive H 2 O 2 may cause the self-decomposition into H 2 O and O 2 (Equation ( 7)), and the radical-radical reaction (Equation ( 8)) causes additional consumption of hydroxyl radical (Yuan et al 2019;Wang et al 2020b).…”

Section: Effect Of H 2 O 2 Concentrationmentioning

confidence: 99%

“…The synthesis of nanoscale catalysts is an attractive strategy for improving catalytic activity. Metals supported on carbon matrix such as activated carbon, biochar, and graphene have been reported (Wu et al 2020;Wang et al 2021b). Graphitic carbon nitride (g-C 3 N 4 ), a layered material with 2D π-conjugated polymeric structure, is a promising matrix for loading active metals.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

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Ultrasound assisted Fenton-like degradation of dyes using copper doped graphitic carbon nitride

Wang

Huang

Sun

et al. 2021

Water Science and Technology

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A novel copper doped graphitic carbon nitride (Cu-C3N4) was successfully synthesized and used as an effective Fenton-like catalyst. Cu-C3N4 was characterized by scanning electron microscopy, surface area analyzer, Fourier transform infrared spectroscopy, X-ray diffractometer, and X-ray photoelectron spectroscopy. Effect of process parameters including catalyst dosage, hydrogen peroxide (H2O2) concentration, solution pH, and initial methylene blue (MB) concentration was investigated to evaluate catalytic performance. The pseudo first-order kinetic model was used to describe the catalytic process. The enhancement of MB degradation is observed assisted by ultrasound. MB degradation of 96% is obtained within 30 min in Cu-C3N4/H2O2/ultrasound system, and the corresponding rate constant is 0.099 min−1. Effective MB degradation is obtained over a broad pH range (3.3–9.9). The catalytic mechanism is examined by ultraviolet-visible spectra, quenching test, and electron spin resonance determination. The dominant mechanism of MB degradation is ascribed to the ultrasonic H2O2 activation by Cu-C3N4 for hydroxyl radical generation. Cu-C3N4 has good reusability and is effective to degrade rhodamine B and acid orange 7. This work not only contributes to the field of wastewater treatment, but also provides insights into the synthesis of Fenton-like catalysts. The results manifest that Cu-C3N4 is a promising Fenton-like catalyst for dye degradation in the field of environmental pollution remediation.

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Section: Effect Of Catalyst Dosagementioning

confidence: 84%

Section: Effect Of H 2 O 2 Concentrationmentioning

confidence: 97%

Section: Effect Of Catalyst Dosagementioning

confidence: 99%

Section: Effect Of H 2 O 2 Concentrationmentioning

confidence: 99%

Section: Graphical Abstract Introductionmentioning

confidence: 99%

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Ultrasound assisted Fenton-like degradation of dyes using copper doped graphitic carbon nitride

Wang

Huang

Sun

et al. 2021

Water Science and Technology

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Cost‐Effective H₂O₂‐Regeneration of Powdered Activated Carbon by Isolated Fe Sites

Tian

Yang

et al. 2022

Advanced Science

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The reuse of powdered activated carbon (PAC) vitally determines the economics and security of the PAC‐based adsorption process, while state‐of‐the‐art PAC regeneration technologies are usually unsatisfactory. Here, it is demonstrated that isolated Fe sites anchored on commercial PAC enable fast H2O2 activation to produce Fe‐based reactive oxygen species for highly efficient PAC regeneration at room temperature. Taking rhodamine B as a representative pollutant, PAC decorated with isolated Fe sites realize H2O2 based regeneration with negligible adsorption capacity degradation for 10 cycles. Moreover, in terms of the PAC loss rate, this technology is greatly superior to traditional Fenton‐based regeneration technology. Further operando experiments and theoretical calculations reveal that the high regeneration performance can be attributed to the isolated HOFeO motifs, which activate H2O2 via a nonradical reaction pathway. These findings provide a very promising strategy toward reducing the cost of H2O2‐based PAC regeneration technology.

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Adsorption characteristics of aqueous Cr(VI) by using magnetic γFe₂O₃/Fe₃O₄ lotus stem biochar by NaOH modification

Liu

Xie

Wang

et al. 2023

Env Prog and Sustain Energy

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The article aims to investigate the adsorption characteristics of aqueous Cr(VI) biochar by magnetic γFe2O3/Fe3O4/NaOH lotus stem biochar (SMBC) which was synthesized with modification of γFe2O3, Fe3O4, and sodium hydroxide. Biochar samples before and after adsorption were characterized with Brunauer Emmett Teller, X‐ray diffractometer, Fourier transform infrared spectroscopy, X‐ray photoelectron spectrometer, magnetism. The results showed that SMBC was successfully prepared with the saturation magnetization of 66.608 emu/g and the BET specific surface area of 239.56 m2/g. The adsorption isotherm study showed that the theoretical maximum adsorption capacity of SMBC for Cr(VI) was 196.270 mg/g. The process of its adsorption of Cr(VI) fit the Langmuir isotherm adsorption model and the pseudo‐second‐order kinetic model, indicating that this process was chemical adsorption. The adsorption mechanism of SMBC to Cr(VI) mainly included electrostatic interaction, redox, and complexation. Desorption and regeneration experiment results showed that SMBC after adsorption could be easily recycled from the solution under the force of an external magnetic field. Furthermore, the adsorption capacity of SMBC reached about 80% of the original even after six desorption/regeneration cycles. This study proves that SMBC showed great potential as a separable and reproducible adsorbent to remove Cr(VI) in wastewater with excellent adsorption performance, strong adaptability, environmental friendliness, and good recycle.

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Highly dispersed iron-doped biochar derived from sawdust for Fenton-like degradation of toxic dyes

Cited by 108 publications

References 58 publications

Ultrasound assisted Fenton-like degradation of dyes using copper doped graphitic carbon nitride

Ultrasound assisted Fenton-like degradation of dyes using copper doped graphitic carbon nitride

Cost‐Effective H₂O₂‐Regeneration of Powdered Activated Carbon by Isolated Fe Sites

Adsorption characteristics of aqueous Cr(VI) by using magnetic γFe₂O₃/Fe₃O₄ lotus stem biochar by NaOH modification

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Highly dispersed iron-doped biochar derived from sawdust for Fenton-like degradation of toxic dyes

Cited by 108 publications

References 58 publications

Ultrasound assisted Fenton-like degradation of dyes using copper doped graphitic carbon nitride

Ultrasound assisted Fenton-like degradation of dyes using copper doped graphitic carbon nitride

Cost‐Effective H2O2‐Regeneration of Powdered Activated Carbon by Isolated Fe Sites

Adsorption characteristics of aqueous Cr(VI) by using magnetic γFe2O3/Fe3O4 lotus stem biochar by NaOH modification

Contact Info

Product

Resources

About

Cost‐Effective H₂O₂‐Regeneration of Powdered Activated Carbon by Isolated Fe Sites

Adsorption characteristics of aqueous Cr(VI) by using magnetic γFe₂O₃/Fe₃O₄ lotus stem biochar by NaOH modification