Active biochar support nano zero-valent iron for efficient removal of U(VI) from sewage water

Zhang, Qi; Wang, Yangyang; Wang, Zheng; Zhang, Zhijie; Wang, Xiaodong; Yang, Zhenglong

doi:10.1016/j.jallcom.2020.156993

Cited by 97 publications

(24 citation statements)

References 56 publications

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“…2B), Fe 2+ appeared at BE of 710.85 eV, while the two peaks emerged at BE of 713.97 and 716.74 eV correspond to Fe 3+ [47]. Essentially, the presence of Fe 0 indicated by the peak at BE of 720.81 and the existence of FeOOH at BE of 724.66 and 728.34 eV infers the suggested core-shell structure of NZVI [48]. Moreover, C1s spectrum (Fig.…”

Section: Xpsmentioning

confidence: 73%

Zero-valent iron supported-lemon derived biochar for ultra-fast adsorption of methylene blue

El-Monaem

Omer

Eldin

et al. 2022

Biomass Conv. Bioref.

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Green-based materials represent a new promising class of ecofriendly and economic adsorbents. Herein, nano zero-valent iron supported-lemon derived biochar (NZVI-LBC) was prepared for the first time and examined in the adsorptive removal of methylene blue as a model pollutant. Different characterization tools were used to ensure the successful fabrication of the NZVI-LBC composite including FTIR, XRD, TEM, XPS, VSM, BET, and zeta potential analysis. It was found that the fabricated NZVI–supported biochar composite attained the propitious adsorbent criteria since it provided a supreme efficient adsorption process at short time. The reckoned maximum adsorption capacity of MB onto NZVI-LBC reached 1959.94 mg/g within merely 5 min. The obtained data clarified that the adsorption process of MB onto NZVI-LBC fitted pseudo 2nd order kinetic model and Freundlich isotherm model. Besides, the adsorption process of MB onto NZVI-LBC was found to be endothermic in nature. In addition, NZVI-LBC composite revealed an excellent adsorption behavior even after seven cycles. The concrete results reflect the potentiality of NZVI-LBC composite to be a superb candidate to remove cationic pollutants from their aqueous solutions. Graphical abstract

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Section: Xpsmentioning

confidence: 73%

Zero-valent iron supported-lemon derived biochar for ultra-fast adsorption of methylene blue

El-Monaem

Omer

Eldin

et al. 2022

Biomass Conv. Bioref.

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“…The adsorption of Pb 2þ on hydrochar involves multiple mechanisms, including physical adsorption by porous structures, metal-π interaction with aromatic C ¼ C bonds, and metal complexation with functional groups containing oxygen (Tan et al 2019;Nadarajah et al 2021). As shown in Figure 5, the characteristic of C ¼ O and C-O weaken after adsorption, proving that the functional groups had taken part in the elimination of heavy metal (Zhang et al 2021). Taking into account the properties of the hydrochar materials used in the present study, it is likely that the porous structure with carbon spheres also played a critical role in Pb 2þ adsorption.…”

Section: Adsorption Capacitymentioning

confidence: 99%

“…Many methods including membrane filtration, ion exchange, redox reaction, precipitation, and adsorption have been developed for heavy metal elimination from industrial wastewater and contaminated groundwater. Among these methods, adsorption is widely used because of its convenience and high efficiency (Zhang et al 2021). In recent years, zero-valent iron (ZVI), especially nanoscale ZVI (nZVI), has been studied for its potential use in environmental remediation, including the removal of heavy metals from water (Li et al 2017;Yoshino et al 2018).…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Synthesis of hydrochar supported zero-valent iron composites through hydrothermal carbonization of granatum and zero-valent iron: potential applications for Pb2+ removal

Jia

Tang²,

2021

Water Science and Technology

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In the present investigation, a one-step synthesis of hydrochar (HC) supported zero-valent iron (ZVI) was performed through hydrothermal carbonization (HTC) of granatum and ZVI. According to XRD, XPS, and FTIR data, ZVI was evenly distributed on the surface of the hydrochar. In addition, the external ZVI oxide layer and the functional groups present in the hydrochar remained on the surface of the HC/ZVI composites after HTC treatment. The surface area of the HC/ZVI composites was between 31.11 and 44.16 m2/g. These numbers were higher than those obtained for hydrochar (20.36 m2/g) and ZVI (12.14 m2/g) separately. The Pb2+ adsorption capacity of hydrochar and ZVI was 28.64 and 192.44 mg/g, respectively (25 °C, pH = 6.05, Pb2+ concentration of 200 mg/L with 0.05 g HC and 0.01 g ZVI). In addition, the adsorption capacity of the composites was between 49.63 and 88.09 mg/g. The data obtained for Pb2+ removal by the samples used in this experiments fitted well the pseudo-second-order kinetics and Langmuir isotherm models. Therefore, hydrochar may represent a promising supporting material for the synthesis of ZVI composites.

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“…The nano-zero-valent of some metals could be used in removing pollutants from soil and water such as thallium (Tl) removal by nano-zero-valent Mn (Li et al 2020), lead (Pb) by nano-zero-valent Sn (Mahmoud and Abdelwahab 2021), antibiotics by nano-zero-valent tungsten (Ye et al 2020), antibiotic sulfamethazine by nanosized zerovalent copper (Zhang et al 2020) and uranium (U-VI) by nano zero-valent iron (Zhang et al 2021). The nano-zero-valent iron (nZVI) or iron nanoparticles is a promising remediator material could be used in environmental remediation.…”

Section: Nano-zero-valent Ironmentioning

confidence: 99%

Agro-Pollutants and their Nano-Remediation from Soil and Water: A Mini-Review

El-Ramady

El-Henawy

Amer

et al. 2020

EBSS

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T HE human activities include the agricultural, industrial and other activities. The agricultural sector is considered the main source for our life's supplies. However, the agricultural activities or practices might result many pollutants such as applied mineral fertilizers, pesticides, effluents from domestic and industrial sewages and vehicular emissions. Therefore, a remediation to remove or decrease the pollutants in soil and water is needed for the environment protection. This remediation has several classic strategies several years ago, but a promising and new approaches have been established particularly nano-remediation. This nano-remediation depends on the applied nanomaterials in removing pollutants from soils and water through nano-bioremediation and nano-phytoremediation. The most important nanomaterials that have potential in removing pollutants from contaminated soils and water are nano-silica, nano-zero-valent of iron, nano-sized iron sulfide particles, nano-ZnO and others. However, many challenges or open questions are still needing a justification because using nanomaterials in higher concentrations are toxic to plants and agro-environment. Are these nanomaterials stable under environmental conditions or will be converted into toxic ones or still need to be identified for sustainable nano-remediation? Is there any possibility to enter the nanomaterials or other toxic compounds the food chain through these plants? Therefore, a lot of further research is needed concerning the nano-remediation in removal the agro-pollutants.

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Active biochar support nano zero-valent iron for efficient removal of U(VI) from sewage water

Cited by 97 publications

References 56 publications

Zero-valent iron supported-lemon derived biochar for ultra-fast adsorption of methylene blue

Zero-valent iron supported-lemon derived biochar for ultra-fast adsorption of methylene blue

Synthesis of hydrochar supported zero-valent iron composites through hydrothermal carbonization of granatum and zero-valent iron: potential applications for Pb2+ removal

Agro-Pollutants and their Nano-Remediation from Soil and Water: A Mini-Review

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