Rapid removal of p-chloronitrobenzene from aqueous solution by a combination of ozone with zero-valent zinc

Zhang, Jing; Wu, Yao; Liu, Liping; Lan, Yeqing

doi:10.1016/j.seppur.2015.07.060

Cited by 52 publications

(6 citation statements)

References 25 publications

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“…Nevertheless, Zhang et al . 34 and Yuan et al . 27 found that the introduction of Cl − could promote the degradation of organics, which was caused by the complex formation between Cl − and the catalyst and the presence of main oxidizing free radical was O 2 − instead of ·OH.…”

Section: Resultsmentioning

confidence: 94%

Insight into the characteristics, removal, and toxicity of effluent organic matter from a pharmaceutical wastewater treatment plant during catalytic ozonation

Wen

Lin

et al. 2018

Sci Rep

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Changes in the characteristics, removal efficiency, and toxicity of pharmaceutical effluent organic matter (EfOM) after catalytic ozonation were investigated in this study. After a 90-min treatment with a catalytic ozonation process (COP) in the presence of MnO2 ceramsite, the total organic carbon (TOC), UV254, colority, protein, and humic acid removal rates were 13.24%, 60.83%, 85.42%, 29.36% and 74.19%, respectively. The polysaccharide content increased by 12.73 mg/L during the COP for reaction times between 0 and ~50 min and decreased by 6.97 mg/L between 50 and ~90 min. Furthermore, 64.44% of the total colority was detected in the hydrophobic organic matter (HOM) fraction, and after the COP, and 88.69% of the colority in the HOM was eliminated. Meanwhile, only 59.18% of the colority in the hydrophilic organic matter (HIM) fraction was removed. GC-MS analysis showed that 38 organic pollutant species were completely removed, 8 were partially removed, and 7 were generated. After 90 min of COP treatment, the pharmaceutical EfOM toxicity was effectively reduced based on the higher incubation and lower mortality rates.

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Section: Resultsmentioning

confidence: 94%

Insight into the characteristics, removal, and toxicity of effluent organic matter from a pharmaceutical wastewater treatment plant during catalytic ozonation

Wen

Lin

et al. 2018

Sci Rep

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“…Among the inorganic species used as active phases in hydrogen-peroxide-mediated processes, the simplest compositions are zero-valent metal nanoparticles (e.g., Fe 0 , Al 0 , Zn 0 , Cu 0 ) [124][125][126][127][128][129][130], which bear strong chemical reducibility, high efficiency, and large specific surface although the main drawbacks are the tendency towards agglomeration and oxidization [131]. Nanoscale zero-valent iron (n-ZVI) is certainly the most utilized in environmental applications, see entry 25 in Table 1.…”

Section: Considerations On Chemical Compositions and Stabilitymentioning

confidence: 99%

An Overview of Environmental Catalysis Mediated by Hydrogen Peroxide

Rigoletto,

Laurenti,

Tummino

2024

Catalysts

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The use of hydrogen peroxide (produced in situ or ex situ) as the main agent in oxidative processes of environmental pollutant removal is widely studied. The degradation of water pollutants, such as dyes, pharmaceuticals, cosmetics, petroleum derivatives, and even pathogens, has been successfully obtained by different techniques. This review gives an overview of the more recent methods developed to apply oxidative processes mediated by H2O2 and other reactive oxygen species (ROS) in environmental catalysis, with particular attention to the strategies (Fenton-like and Bio-Fenton, photo- and electro-catalysis) and the materials employed. A wide discussion about the characteristics of the materials specifically studied for hydrogen peroxide activation, as well as about their chemical composition and morphology, was carried out. Moreover, recent interesting methods for the generation and use of hydrogen peroxide by enzymes were also presented and their efficiency and applicability compared with the Fenton and electro-Fenton methods discussed above. The use of Bio-Fenton and bi-enzymatic methods for the in situ generation of ROS seems to be attractive and scalable, although not yet applied in full-scale plants. A critical discussion about the feasibility, criticalities, and perspectives of all the methods considered completes this review.

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“…P-chloronitrobenzene (p-CNB) has been classified as a persistent toxic substance in which the main pathway of release into the environment encompasses its utilization in the manufacture of dyes, corrosion inhibitors, medicines and pesticides [ 1 , 2 ]. The extent of its toxicity, carcinogenicity, mutagenicity and teratogenicity on humans and biodiversity has already been established [ 3 , 4 , 5 , 6 , 7 ]. Thus, it is very necessary to devise feasible and effective methods to remove p-CNB from the environment in order to prevent the fatal consequences of the chemical on human health and biodiversity.…”

Section: Introductionmentioning

confidence: 99%

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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Rapid removal of p-chloronitrobenzene from aqueous solution by a combination of ozone with zero-valent zinc

Cited by 52 publications

References 25 publications

Insight into the characteristics, removal, and toxicity of effluent organic matter from a pharmaceutical wastewater treatment plant during catalytic ozonation

Insight into the characteristics, removal, and toxicity of effluent organic matter from a pharmaceutical wastewater treatment plant during catalytic ozonation

An Overview of Environmental Catalysis Mediated by Hydrogen Peroxide

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

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