Photocatalytic degradation of 2,4-dinitrophenol

Shukla, Shyam S.; Dorris, Kenneth L.; Chikkaveeraiah, Bhaskara V.

doi:10.1016/j.jhazmat.2008.08.047

Cited by 55 publications

(28 citation statements)

References 12 publications

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“…Shukla et al [112] • Only 46.67% of 2,4-DNP removal could be achieved by sunlight irradiation under the same conditions. m-nitrophenol (m-NP) TiO 2 Degussa P-25 Effects of catalyst pre-wetting on TiO 2 photocatalytic activity…”

Section: 4-dinitrophenol (24-dnp)mentioning

confidence: 95%

Roles of titanium dioxide and ion-doped titanium dioxide on photocatalytic degradation of organic pollutants (phenolic compounds and dyes) in aqueous solutions: A review

Teh¹,

Mohamed²

2011

Journal of Alloys and Compounds

413

182

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Section: 4-dinitrophenol (24-dnp)mentioning

confidence: 95%

Roles of titanium dioxide and ion-doped titanium dioxide on photocatalytic degradation of organic pollutants (phenolic compounds and dyes) in aqueous solutions: A review

Teh¹,

Mohamed²

2011

Journal of Alloys and Compounds

413

182

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“…The hydroxyl radical (˙OH) acts as a strong oxidizing agent assigned by standard oxidation potential (E o ) as much as 2.8 V, that is higher than other oxidants such as ozone (E o = 2.0 V) and H2O2 (E o = 1.8 V) (Fujishima et al, 2000). The high strength of the hydroxyl radicals (˙OH) can induce Pb 2+ oxidation (Tanaka et al, 1986;Chen and Ray, 2001;Wahyuni et al, 2015), as illustrated by reaction (3), as well as degrade a large number of organic compounds (Reza et al, 2017;Ajmal et al, 2014;Dariani et al, 2016;Zuo et al, 2014;Gautam et al, 2016;Shukla et al, 2009;Choquette-Labbé et al, 2014;Grabowska et al, 2012;Turki et al, 2015) effectively. However, due to the heterogeneous system, the photocatalysis process faces light entering inhibition when large dose of the TiO2 powder is used (Reza et al, 2017;Dariani et al, 2016;Gautam et al, 2016), leading to the less effective photooxidation.…”

Section: Introductionmentioning

confidence: 99%

Removal of Pb (II) Ions in The Aqueous Solution by Photo-Fenton Method

2019

Global NEST Journal

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<p>Photo-Fenton for decreasing concentration of Pb(II) ions in the aqueous solution is systematically studied. The photo-Fenton process was carried out by batch technique, under UV light. The influences of process operating parameters were evaluated. The results of the research demonstrated that by photo-Fenton process, the concentration of Pb(II) ions in the aqueous solution can be decreased, that may be through oxidation mechanism by OH radicals. The decrease is found to be controlled by Fe2+ and H2O2 concentrations, as well as by the pH and the irradiation time. For 20 mg/L of Pb(II) in the 100 mL solution, the optimum condition of the oxidation is obtained to be 10 mmole/L of Fe2+, 200 mmole/L of H2O2, pH 3, and 90 min of the reaction time. It is also confirmed that the oxidation of Pb (II) by OH radical has formed the undissolved PbO2, that is less toxic and easier to be handled.</p>

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“…There are six possible dinitrophenol (DNP) forms and 2,4-Dinitrophenol (2,4-DNP) is the most important toxic and refractory pollutant [1]. 2,4-DNP, a yellowish crystalline solid, has been used in manufacturing of pesticides, pharmaceuticals, production of dyes, explosive materials, and as an indicator for the detection of potassium and ammonium ions.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of 2,4-dinitrophenol with laccase immobilized on nano-porous silica beads

Dehghanifard

Jafari

Kalantary

et al. 2013

J Environ Health Sci Engineer

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Many organic hazardous pollutants, including 2,4-dinitrophenol (2,4-DNP), which are water soluble, toxic, and not easily biodegradable make concerns for environmental pollution worldwide. In the present study, degradation of nitrophenols-contained effluents by using laccase immobilized on the nano-porous silica beads was evaluated. 2,4-DNP was selected as the main constituent of industrial effluents containing nitrophenols. The performance of the system was characterized as a function of pH, contact time, temperature, pollutant, and mediator concentrations. The laccase-silica beads were employed in a mixed-batch reactor to determine the degradation efficiency after 12 h of enzyme treatment. The obtained data showed that the immobilized laccase degraded more than 90% of 2,4-DNP within 12 h treatment. The immobilization process improved the activity and sustainability of laccase for degradation of the pollutant. Temperatures more than 50°C reduced the enzyme activity to about 60%. However, pH and the mediator concentration could not affect the enzyme activity. The degradation kinetic was in accordance with a Michaelis–Menten equation with Vmax and Km obtained as 0.25–0.38 μmoles/min and 0.13–0.017 mM, respectively. The stability of the immobilized enzyme was maintained for more than 85% of its initial activity after 30 days. Based on the results, it can be concluded that high resistibility and reusability of immobilized laccase on CPC-silica beads make it considerable choice for wastewater treatment.

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Photocatalytic degradation of 2,4-dinitrophenol

Cited by 55 publications

References 12 publications

Roles of titanium dioxide and ion-doped titanium dioxide on photocatalytic degradation of organic pollutants (phenolic compounds and dyes) in aqueous solutions: A review

Roles of titanium dioxide and ion-doped titanium dioxide on photocatalytic degradation of organic pollutants (phenolic compounds and dyes) in aqueous solutions: A review

Removal of Pb (II) Ions in The Aqueous Solution by Photo-Fenton Method

Biodegradation of 2,4-dinitrophenol with laccase immobilized on nano-porous silica beads

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