Nanoscale Zero-Valent Iron Supported on Carbon Nitride as a Peroxymonosulfate Activator for the Efficient Degradation of Paraxylene

Mei, Haotian; Wang, Qi; Liu, Guanhong; Zhu, Xu-Dong; Zhang, Meng; Huang, Kai; Lin, Kuangfei

doi:10.1007/s10562-021-03596-7

Cited by 4 publications

(2 citation statements)

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“…The chemical methods, including photocatalytic oxidation [ 9 ], Fenton oxidation [ 10 , 11 ] and nanotechnology [ 2 , 12 ], have been widely used to reduce p-CNB. Among these chemical methods, nanotechnology (nanoscale zerovalent iron (Fe 0 )) has been identified as the most effective due to its relatively low cost, high adsorption capacity, strong reactivity and high reductivity [ 13 , 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Coupling Removal of P-Chloronitrobenzene and Its Reduction Products by Nano Iron Doped with Ni and FeOOH (nFe/Ni-FeOOH)

Liang

Anang

et al. 2022

Materials

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The removal of chlorinated pollutants from water by nanoparticles is a hot topic in the field of environmental engineering. In this work, a novel technique that includes the coupling effect of n-Fe/Ni and its transformation products (FeOOH) on the removal of p-chloronitrobenzene (p-CNB) and its reduction products, p-chloroaniline (p-CAN) and aniline (AN), were investigated. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were employed to characterize the nano-iron before and after the reaction. The results show that Fe0 is mainly oxidized into lath-like lepidocrocite (γ-FeOOH) and needle-like goethite (α-FeOOH) after 8 h of reaction. The coupling removal process and the mechanism are as follows: Fe0 provides electrons to reduce p-CNB to p-CAN and then dechlorinates p-CAN to AN under the catalysis of Ni. Meanwhile, Fe0 is oxidized to FeOOH by the dissolved oxygen and H2O. AN is then adsorbed by FeOOH. Finally, p-CNB, p-CAN, and AN were completely removed from the water. In the pH range between 3 and 7, p-CAN can be completely dechlorinated by n-Fe/Ni within 20 min, while AN can be nearly 100% adsorbed by FeOOH within 36 h. When the temperature ranges from 15 °C to 35 °C, the dechlorination rate of p-CAN and the removal rate of AN are less affected by temperature. This study provides guidance on the thorough remediation of water bodies polluted by chlorinated organics.

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Section: Introductionmentioning

confidence: 99%

“…In the groundwater/wastewater, the n-Fe/Ni reduces the p-CNB into p-chloroaniline (p-CAN) and aniline (AN), while the latter two products are environmental pollutants that significantly threaten humans and biodiversity [ 15 ]. Therefore, it incites the need to devise a more efficient technique to remove the p-CNB in its entirety.…”

Section: Introductionmentioning

confidence: 99%