Study on the mechanism of photo-degradation of p-nitrophenol exposed to 254nm UV light

Zhao, Sufang; Ma, Hongjuan; Wang, Min; Cao, Cheng; Xiong, Jie; Xu, Yunshu; Yao, Side

doi:10.1016/j.jhazmat.2010.03.076

Cited by 46 publications

(27 citation statements)

References 19 publications

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“…However, it took 7 hours of operation to achieve this result, which makes it unfeasible due to the residence time of the batch treatment, as well as the energy consumption, resulting in an increase in the system's operating cost. The treatment using only UV irradiation is not effective in the treatment of waste water containing organic compounds, as was also observed in the work of Datta et al (2004), since it is a lengthy process and degrades the contaminant at significantly lower rates (Zhao et al 2010). In the present study, for a concentration of 10 mg L-1, it took 7 hours of experiment to obtain a degradation of about 63%.…”

Section: Optimization Of Pnf Degradationmentioning

confidence: 78%

Optimization of parameters applied to degradation and mineralization of p-nitrophenol using advanced oxidative processes

Santolin

Tochetto

Dervanoski

et al. 2021

Preprint

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Advanced oxidative processes are widely used in the degradation of organic compounds. The degradation and mineralization of the PNF was evaluated by means of an experimental factorial design, using photolysis (UV) and photo-peroxidation (UV/H2O2). With the results optimized, degradation kinetics was performed and the experimental data adjusted to mathematical models. In the UV system, it was possible to degrade just over 65% and mineralize 15% over 7 h of reaction; however, with the addition of the oxidizing agent H2O2, it was possible to obtain 100% removal of the contaminant, suggesting that there was no formation of intermediate compounds. Kinetics results fitting the first order model and the velocity constants revealed that degradation is extremely faster in the UV/H2O2 system (k1,UV/H2O2 = 0.0580 min− 1 > k1,UV = 0.0018 min− 1).

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Section: Optimization Of Pnf Degradationmentioning

confidence: 78%

Optimization of parameters applied to degradation and mineralization of p-nitrophenol using advanced oxidative processes

Santolin

Tochetto

Dervanoski

et al. 2021

Preprint

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“…Toxicological studies have suggested that p-NP may induce liver injury, hyperplasia and disruption of hormonal balance [6,7]. A lot of efforts have been made out in order to separate, degrade, or reduce p-NP from aquatic environment, such as adsorption [8,9], photodegradation [10,11], biodegradation [12,13], ultrasonic degradation [14], ozonation [15,16], electrochemical degradation [17,18], and catalytic reduction [19][20][21][22]. Among the above methods, catalytic reduction has been considered as the facile route thanks to its highly efficiency and simplicity.…”

Section: Introductionmentioning

confidence: 99%

Well-exposed gold nanoclusters on Indonesia natural zeolite: a highly active and reusable catalyst for the reduction of p-nitrophenol

Yulizar

Kadja

Safa’at

2015

Reac Kinet Mech Cat

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Herein we report the synthesis of gold nanoclusters upon the surface of Indonesia natural zeolite, denoted as Au/INZ. The as-prepared material has been characterized using X-ray diffraction, atomic absorption spectroscopy, UV-Vis diffuse reflectance spectroscopy, transmission electron microscopy, selected area electron diffraction and N 2 physisorption. These characterizations confirm the welldefined gold nanoclusters formed on the surface of Au/INZ. Our catalyst has been applied for the reduction of p-nitrophenol to p-aminophenol. The reduction conversion of ca. 95 % was achieved by the use of 50 mg Au/INZ for 10 min with the observed rate constant (k obs ) was of 0.818 min -1 . The E a of the reaction was 16.9 kJ/mol, indicating the diffusion-controlled mechanism. In addition, the reusability test confirmed that our catalyst can be exploited for several times without the significant loss of its high activity.Electronic supplementary material The online version of this article (

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“…Other methods are based on a “dig and incinerate approach,” such as thermal treatment in which heat is used to remove or destroy the contaminants [6] . Among all the remediation technologies, soil washing combined with photochemical treatments has become increasingly advantageous because this method does not release toxic by-products into the environment and the cost is reasonable [7] . Soil washing is a well-developed technology that removes contaminants from polluted solid phase.…”

Section: Introductionmentioning

confidence: 99%

The Comparative Photodegradation Activities of Pentachlorophenol (PCP) and Polychlorinated Biphenyls (PCBs) Using UV Alone and TiO2-Derived Photocatalysts in Methanol Soil Washing Solution

et al. 2014

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Photochemical treatment is increasingly being applied to remedy environmental problems. TiO2-derived catalysts are efficiently and widely used in photodegradation applications. The efficiency of various photochemical treatments, namely, the use of UV irradiation without catalyst or with TiO2/graphene-TiO2 photodegradation methods was determined by comparing the photodegadation of two main types of hydrophobic chlorinated aromatic pollutants, namely, pentachlorophenol (PCP) and polychlorinated biphenyls (PCBs). Results show that photodegradation in methanol solution under pure UV irradiation was more efficient than that with either one of the catalysts tested, contrary to previous results in which photodegradation rates were enhanced using TiO2-derived catalysts. The effects of various factors, such as UV light illumination, addition of methanol to the solution, catalyst dosage, and the pH of the reaction mixture, were examined. The degradation pathway was deduced. The photochemical treatment in methanol soil washing solution did not benefit from the use of the catalysts tested. Pure UV irradiation was sufficient for the dechlorination and degradation of the PCP and PCBs.

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Study on the mechanism of photo-degradation of p-nitrophenol exposed to 254nm UV light

Cited by 46 publications

References 19 publications

Optimization of parameters applied to degradation and mineralization of p-nitrophenol using advanced oxidative processes

Optimization of parameters applied to degradation and mineralization of p-nitrophenol using advanced oxidative processes

Well-exposed gold nanoclusters on Indonesia natural zeolite: a highly active and reusable catalyst for the reduction of p-nitrophenol

The Comparative Photodegradation Activities of Pentachlorophenol (PCP) and Polychlorinated Biphenyls (PCBs) Using UV Alone and TiO2-Derived Photocatalysts in Methanol Soil Washing Solution

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