Enhanced nitrate removal by novel bimetallic Fe/Ni nanoparticles supported on biochar

Li, Pengjun; Lin, Kairong; Fang, Zhanqiang; Wang, Kangming

doi:10.1016/j.jclepro.2017.03.042

Cited by 156 publications

(43 citation statements)

References 34 publications

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“…6Fe Figure 3 presents the XPS patterns of nZVI-BC. For fresh nZVI-BC, the peaks at 706.9 and 720.2 eV indicated the presence of Fe 0 in nZVI-BC, and the peak at 711.1 eV indicated Fe 3+ (Fe2O3) [32]. These results suggest that the iron particles were covered by an oxide film, which formed a core-shell structure [33].…”

Section: Namementioning

confidence: 89%

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Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator

Zhang

Zhao

Yang

et al. 2020

IJERPH

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Biochar (BC)-supported nanoscale zero-valent iron (nZVI-BC) was investigated as a heterogeneous Fenton-like activator to degrade the antibiotic ornidazole (ONZ). The characterization of nZVI-BC indicated that BC could enhance the adsorption of ONZ and reduce the aggregation of nZVI. Thus, nZVI-BC had a higher removal efficiency (80.1%) than nZVI and BC. The effects of parameters such as the nZVI/BC mass ratio, pH, H 2 O 2 concentration, nZVI-BC dose, and temperature were systematically investigated, and the removal of ONZ followed a pseudo-second-order kinetic model. Finally, possible pathways of ONZ in the oxidation process were proposed. The removal mechanism included the adsorption of ONZ onto the surface of nZVI-BC, the generation of •OH by the reaction of nZVI with H 2 O 2 , and the oxidation of ONZ. Recycling experiments indicated that the nZVI-BC/H 2 O 2 system is a promising alternative for the treatment of wastewater containing ONZ.

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Section: Namementioning

confidence: 89%

“…Possible reasons for the foregoing findings are manifold. Firstly, the corrosion of Fe 0 was faster and easier at lower pH values [32], which increased the concentration of Fe 2+ and generated more •OH. Secondly, the oxidation potential of •OH was significantly influenced by the solution pH.…”

Section: Effect Of Initial Phmentioning

confidence: 99%

Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator

Zhang

Zhao

Yang

et al. 2020

IJERPH

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“…The raw EAF slag can be used as an inexpensive absorbing agent in the treatment process, especially for wastewaters burdened with metallic ions [23]. On the other hand, studies have used raw electric furnace slag, which was not supported on AC for adsorption studies [23], thereby having the potential to result in secondary pollution [24,25]. Again the studies mentioned above did not look into the magnetic properties of their electric furnace slag.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of magnetic activated carbon developed from palm kernel shells

Anyika

Asri

Majid

et al. 2017

Nanotechnol. Environ. Eng.

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Magnetic activated carbon (MG-AC), a solid product made by dispersing magnetic substrates on AC, is gaining attention for the removal of heavy metals from wastewater due to its favorable physico-chemical properties such as enhanced surface area and magnetic properties, respectively. However, the effects of two contrasting substrates, i.e., metal solution and metal particles, for the synthesis of MG-AC to obtain enhanced magnetic property have not been considered. The MG-AC was prepared by incorporating Fe 3 O 4 into the AC from two different sources of iron: Fe 3 O 4 extracted from electric arc furnace slag and from a ferric chloride/ferrous sulfate solution, to produce magnetic palm kernel shell from slag (MG-PKSS) and magnetic palm kernel shell from iron suspension (MG-PKSF), respectively. The adsorbent samples were characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis, X-ray diffraction, electron microscopy, i.e., SEM and FESEM, energy-dispersive X-ray, nitrogen adsorption, vibrating sample magnetometer. The results showed that the MG-PKSF had a greater BET surface area of 257 m 2 g -1 , a pore volume of 0.1124 cc g -1 and higher magnetic properties with a magnetic saturation of 49.55 emu g -1 relative to the MG-PKSS. The FTIR spectrum of the MG-PKSF illustrated the intense OH bending at 1629 cm -1 which can be attributed to the presence of oxygen in the samples. The absorption bands at 1093 and 579 cm -1 indicated the presence of C-O stretching and metal-oxygen (M-O) bands due to the interaction of iron and oxygen. Therefore, the MG-PKSF presented better characteristics for heavy metal removal from wastewater relative to the MG-PKSS, thereby suggesting that the raw material (metal solution) for impregnation played a crucial role in enhancing the quality of the MG-AC.

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“…The pronounced peak at 1115 cm −1 can be attributed to stretching vibrations of C-OH from phenol and hydroxyl groups [40]. Finally, two peaks at 675 and 615 cm −1 can be attributed to the stretching vibration of Fe-O [41]. The results revealed that Fe particles were deposited onto the surface of Fe@BC.…”

Section: Materials Characterizationmentioning

confidence: 86%

Efficient Removal of Diclofenac from Aqueous Solution by Potassium Ferrate-Activated Porous Graphitic Biochar: Ambient Condition Influences and Adsorption Mechanism

Tâm

Liu

Bashir

et al. 2019

IJERPH

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Porous graphitic biochar was synthesized by one-step treatment biomass using potassium ferrate (K 2 FeO 4 ) as activator for both carbonization and graphitization processes. The modified biochar (Fe@BC) was applied for the removal of diclofenac sodium (DCF) in an aqueous solution. The as-prepared material possesses a well-developed micro/mesoporous and graphitic structure, which can strengthen its adsorption capacity towards DCF. The experimental results indicated that the maximum adsorption capacity (q max ) of Fe@BC for DCF obtained from Langmuir isotherm simulation was 123.45 mg·L −1 and it was a remarkable value of DCF adsorption in comparison with that of other biomass-based adsorbents previously reported. Thermodynamic quality and effect of ionic strength studies demonstrated that the adsorption was a endothermic process, and higher environmental temperatures may be more favorable for the uptake of DCF onto Fe@BC surface; however, the presence of NaCl in the solution slightly obstructed DCF adsorption. Adsorption capacity was found to be decreased with the increase of solution pH. Additionally, the possible mechanism of the DCF adsorption process on Fe@BC may involve chemical adsorption with the presence of H-bonding and π-π interaction. With high adsorption capacity and reusability, Fe@BC was found to be a promising absorbent for DCF removal from water as well as for water purification applications.

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Enhanced nitrate removal by novel bimetallic Fe/Ni nanoparticles supported on biochar

Cited by 156 publications

References 34 publications

Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator

Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator

Synthesis and characterization of magnetic activated carbon developed from palm kernel shells

Efficient Removal of Diclofenac from Aqueous Solution by Potassium Ferrate-Activated Porous Graphitic Biochar: Ambient Condition Influences and Adsorption Mechanism

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