Enhanced removal of 2,4-dichlorophenol by Fe-Pd@ZIF-8 via adsorption and dechlorination

Weng, Xiulan; Ma, Huijing; Owens, Gary; Chen, Zuliang

doi:10.1016/j.seppur.2022.122371

Cited by 17 publications

(6 citation statements)

References 35 publications

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“…91 Bentonite prevents the agglomeration or inactivation of nZVI due to the 9% within 120 min owing to the synergism of adsorption and reduction. 37 Benetting from the activity protection of nZVI/Pd by ZIF-8, the removal efficiency maintained relatively high at 73.7% even aer 5 repeated uses (Fig. 6D).…”

Section: Chemical Reduction By Nzvimentioning

confidence: 90%

“…Remedial efforts employing nZVI via reduction have been performed on 1,2-dichloroethylene (DCE), 28 trichloroethylene (TCE), [29][30][31][32] perchloroethylene (PCE), 28 1,1,1-trichloro-2,2-bis(4-chlorophenyl) ethane (DDT), 33 2,4-dichlorophenol (2,4-DCP), [34][35][36][37] trichloronitromethane (TCNM), 38 1,2,4-trichlorobenzene (1,2,4-TCB), 39 2,4,6-trichlorophenol (TCP), 40,41 2chlorobiphenyl (PCB1), 42,43 diclofenac (DCF), 44 chlorinated organophosphate esters (Cl-OPEs), 45 2,2 0 ,4,4 0 -tetrabromodiphenyl ether (BDE-47), 46,47 tetrabromobisphenol A (TBBPA), 48,49 methylene blue, 50 p-nitrophenol, 51,52 nitrobenzene, 53,54 mono-brominated diphenyl ether (BDE-3), 55 Cr(VI), [56][57][58][59][60][61] Sb(V), 62 Ni(II), [63][64][65][66] Pb(II), 65,67 Cu(II), 68 As(V), 69 U(VI), 23,[70][71]...…”

Section: Chemical Reduction By Nzvimentioning

confidence: 99%

See 1 more Smart Citation

Environmental remediation approaches by nanoscale zero valent iron (nZVI) based on its reductivity: a review

Liu,

Chen,

et al. 2024

RSC Adv.

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Section: Chemical Reduction By Nzvimentioning

confidence: 90%

Section: Chemical Reduction By Nzvimentioning

confidence: 99%

Environmental remediation approaches by nanoscale zero valent iron (nZVI) based on its reductivity: a review

Liu,

Chen,

et al. 2024

RSC Adv.

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“…Chlorinated phenol waste discharge into water exhibits toxicity to humans, aquatic organisms, and the environment [1,2]. Consequently, 2,4-dichlorophenol (2,4-DCP) is highly toxic, carcinogenic, and mutagenic and is listed as one of the environmental priority pollutants [3,4]. Hence, it is very significant to find a way to eliminate 2,4-DCP.…”

Section: Introductionmentioning

confidence: 99%

“…Among the existing treatment methods, including photocatalytic degradation [5], electrochemical oxidation [6], membrane filtration [7], flocculation coagulation [8], adsorption [9], and so on, the adsorption process is one of the more efficient and promising technologies owing to its low cost, simplicity in design and operation, and superior adsorption effectiveness even at low concentrations [9][10][11]. In addition to its toxic effect, the presence of 2,4-DCP in water in even trace amounts (5-10 µg/L) produces a specific odor and makes it undrinkable [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

New Hybrid Adsorbents Based on Polyaniline and Polypyrrole with Silicon Dioxide: Synthesis, Characterization, Kinetics, Equilibrium, and Thermodynamic Studies for the Removal of 2,4-Dichlorophenol

et al. 2023

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In the current study, polyaniline and polypyrrole with silicon dioxide (PAni:PPy@SiO2) were combined to formulate a new adsorbent, which was examined using XRD, TEM, SEM, FTIR, TGA, and BET, and the adsorption kinetics were investigated by UV–vis spectroscopy. The optical band gap was also evaluated. The electrochemical behavior was investigated using cyclic voltammograms. Moreover, experimental conditions were used to evaluate the 2,4-dichlorophenol (2,4-DCP) adsorption based on the pH, temperature, reaction time, and initial concentration. The analytical isotherm data were determined by Langmuir, Freundlich, Temkin, Sips, and Redlich–Peterson models. For the analysis of the kinetic data, the pseudo-first- and -second-order models and the intraparticle diffusion model were investigated. It was found that this new adsorbent possessed the highest adsorption efficiency after several regeneration cycles. Furthermore, the thermodynamic parameters of adsorption, such as entropy (ΔS), enthalpy (ΔH), and standard Gibbs were measured. These results suggest that the PAni:PPy backbone can generally be better applied for the elimination of 2,4-dichlorophenol by appropriately dispersing it over the surface of suitable SiO2. This search provides a novel way to develop separable, high-performance adsorbents for adsorbing organic contamination from wastewater.

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“…The study by Gunawardana et al revealed that the microscale bimetals exhibited very weak reactivity towards the dechlorination of pentachlorophenol [22]. However, other researchers have reported that 2,4dichlorophenol could be successfully hydrodechlorinated by bimetallic Pd/Fe [23,24], especially when the bimetal was of nanosize [25].…”

Section: Introductionmentioning

confidence: 99%

Study on free and entangled binary metal nanocatalysts for removal of 2,4,6-trichlorophenol in aqueous phase: a comparative study

Felshia

Gnanamani

2023

Nanotechnology

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The present study highlights the comparative catalytic removal of 2,4,6-trichlorophenol (TCP) in aqueous phase by binary metal nanocatalysts in free as well as entangled forms. In brief, binary nanocatalysts comprising of Fe-Ni are prepared, characterized, and subsequently entangled in reduced graphene oxide (rGO) for better performances and reuse applications. Optimization studies on the mass of free and rGO-entangled binary nanocatalysts with respect to TCP concentration and other environmental factors are studied in detail. Results suggest binary nanocatalysts in free form at 40 mg/ml took 300 min to dechlorinate 600 ppm of TCP, whereas rGO-entangled Fe-Ni catalyst took only 190 min. Experiments on the reuse of the catalyst with respect to removal efficiency implied compared to free form rGO-entangled nanocatalysts exemplify more than 98% of removal efficacy even after 5 times of exposure to 600 ppm TCP concentration. High-performance liquid chromatography analysis display a pattern of sequential dechlorination during catalytic process. Followed by dechlorination, the phenol-enriched aqueous phase exposed to Bacillus licheniformis SL10, which degrades the phenol effectively within 24 hours. In conclusion, the prepared binary metal nanocatalysts, both in free as well as in rGO-entangled forms, effectively dechlorinate 2,4,6-TCP contaminations in aqueous phase, but with significant differences in time taken for the removal. And entanglement facilitate the reuse of the catalyst more effectively. The accumulated phenol biocatalytically removed and suggests the reuse applications of treated water.

show abstract

Enhanced removal of 2,4-dichlorophenol by Fe-Pd@ZIF-8 via adsorption and dechlorination

Cited by 17 publications

References 35 publications

Environmental remediation approaches by nanoscale zero valent iron (nZVI) based on its reductivity: a review

Environmental remediation approaches by nanoscale zero valent iron (nZVI) based on its reductivity: a review

New Hybrid Adsorbents Based on Polyaniline and Polypyrrole with Silicon Dioxide: Synthesis, Characterization, Kinetics, Equilibrium, and Thermodynamic Studies for the Removal of 2,4-Dichlorophenol

Study on free and entangled binary metal nanocatalysts for removal of 2,4,6-trichlorophenol in aqueous phase: a comparative study

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