Photochemical treatment of phenol aqueous solutions using ultraviolet radiation and hydrogen peroxide

Poulopoulos, Stavros G.; Arvanitakis, F; Philippopoulos, C.J.

doi:10.1016/j.jhazmat.2005.06.044

Cited by 51 publications

(32 citation statements)

References 18 publications

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“…In the FTIR spectrum of the oxide after adsorption (Fig. 7B), we cannot observe any characteristic vibration bands of PhOH, but a peak at 1365 cm −1 which is exclusively attributed to the CO 3 [17]. During the adsorption of PhOH, CO 2 contamination cannot be avoided, in particular under the basic condition (pH 10-11).…”

Section: Adsorption Mechanismmentioning

confidence: 99%

“…They can persist for many years in the environment because of their resistance to microbiological degradation. In the last decade, various methods have been proposed to remove phenols, including catalytic oxidation [1,2], photo-oxidation [3], electrochemical oxidation [4], biological degradation [5], ultrafiltration [6] and adsorption [7][8][9][10][11][12][13][14][15]. Since the other methods need special process requirements or special catalysts, adsorption seems to be a good choice in terms of the cost and operation for the removal of phenolic compounds from wastewater.…”

Section: Introductionmentioning

confidence: 99%

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Studies on adsorption of phenol and 4-nitrophenol on MgAl-mixed oxide derived from MgAl-layered double hydroxide

Chen

Zhang³

et al. 2009

Separation and Purification Technology

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a b s t r a c tIn this research, the removal of two phenols (4-nitrophenol and phenol) from aqueous solution was investigated using MgAl-mixed oxide. This oxide was prepared by calcining crystalline MgAl-CO 3 -layered double hydroxide (LDH) at 500 • C for 4 h. We found that it takes 10-12 h for adsorption of 4-nitrophenol to reach the equilibrium at room temperature while the equilibrium time is 20-25 h for phenol adsorption. The kinetic process of 4-nitrophenol adsorption seemingly follows the first-order reaction but phenol is adsorbed in a pseudo-second-order model. We also noted that the maximum adsorption amount of 4-nitrophenol by fitted three-parameter Langmuir-Freundlich isotherm is 367.8 mg/g, much higher than that of phenol (46.9 mg/g). The differences in the adsorption kinetics and dynamics have been related to the adsorption mechanism and adsorbate-adsorbent interactions. The reconstruction of MgAl-mixed oxide in aqueous solution incorporates 4-nitrophenolate into the interlayer. However, it is difficult to intercalate phenolate due to its weaker affinity for LDH in comparison with OH − . In addition, adsorption of MgAl-mixed oxide for 4-nitrophenol and phenol is slightly affected by the initial pH, but considerably facilitated by increasing the adsorption temperature.

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Section: Adsorption Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Studies on adsorption of phenol and 4-nitrophenol on MgAl-mixed oxide derived from MgAl-layered double hydroxide

Chen

Zhang³

et al. 2009

Separation and Purification Technology

View full text Add to dashboard Cite

show abstract

“…In contrast, the BP3 degradation at pH 10 was almost 20% slower when H 2 O 2 was added. Since in this case high concentrations of hydroxyl radicals and H 2 O 2 are present simultaneously, the observed rate retardation most probably results from the consumption/scavenging of hydroxyl radicals by H 2 O 2 , yielding less reactive radicals (such as HO 2 • ) in the solution [80].…”

Section: Bp3 Oxidation By the Peroxone Processmentioning

confidence: 93%

Ozonation as an Advanced Treatment Technique for the Degradation of Personal Care Products in Water

Demeestere

Gago-Ferrero

Langenhove

et al. 2014

The Handbook of Environmental Chemistry

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Water is the most essential element to life on Earth. However, the availability and quality of the global water resources are at risk because many stressors of human origin are putting pressure on it. The contamination of water bodies (lakes, rivers, aquifers and oceans) occurs when man-made chemicals are directly or indirectly discharged into water bodies without adequate treatment to remove harmful compounds, affecting organisms living in these aquatic ecosystems. As new compounds are produced and ultimately detected in the environment, improved water treatment techniques have to be available for their elimination. For the degradation of a wide range of emerging organic micropollutants, last year's

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“…The flasks were agitated for 100 min on a magnetic stirrer at ambient temperature (25 ± 2 • C). The influence of initial 2,4-DNP concentration (100, 200, 300, 400, 500 mg/L), contact time (20, 40, 60, 80, 100 min), particle size (0.192, 0.25, 0.390, 0.780, 1.700 mm), pH (4,5,6,7,8), biosorbent dose (2,4,6,8,10 g/100 mL), and temperature (25,30,35,40,45 • C) was evaluated. Samples were collected from the flasks at predetermined time intervals for analyzing the residual 2,4-DNP concentration in the solution.…”

Section: Batch Biosorption Equilibrium and Kinetic Studiesmentioning

confidence: 99%

Chemically treated kola nut pod as low-cost natural adsorbent for the removal of 2,4-dinitrophenol from synthetic wastewater: batch equilibrium, kinetic, and thermodynamic modelling studies

Agarry¹,

Ogunleye²

2014

Turkish J Eng Env Sci

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Abstract:The feasibility of using chemically treated kola nut pod to remove 2,4-dinitrophenol from its aqueous solutions under batch mode was investigated. The results showed that biosorption of 2,4-dinitrophenol was dependent on initial concentration, contact time, pH, biosorbent particle size, biosorbent dosage, and temperature. The batch equilibrium biosorption data were analyzed by 2 two-parameter (Langmuir and Freundlich) and 2 three-parameter (Redlich-Peterson and Sips) adsorption isotherm models using linear and nonlinear regression methods. The Sips isotherm equation employing the parameter sets derived using the HYBRID/MPSD/ARE errors provided the overall best model to describe the biosorption data of the 2,4-dinitrophenol-kola nut pod system. The maximum monolayer biosorption capacity ( Qmax) was obtained to be 32.26 mg/g with linear regression and 30.10 mg/g with nonlinear regression. The biosorption kinetic data were fitted to 6 biosorption kinetic models using the linear regression method. The 6 kinetic models fitted well to the biosorption kinetic data; however, the pseudo-first-order kinetic model gave the best fit and the biosorption mechanism was controlled by film diffusion. The thermodynamic analysis indicates that the biosorption process was spontaneous, feasible, exothermic, and physical in nature. Thus, chemically modified kola nut pod has potential for application as an effective bioadsorbent for 2,4-dinitrophenol removal from wastewater.

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Photochemical treatment of phenol aqueous solutions using ultraviolet radiation and hydrogen peroxide

Cited by 51 publications

References 18 publications

Studies on adsorption of phenol and 4-nitrophenol on MgAl-mixed oxide derived from MgAl-layered double hydroxide

Studies on adsorption of phenol and 4-nitrophenol on MgAl-mixed oxide derived from MgAl-layered double hydroxide

Ozonation as an Advanced Treatment Technique for the Degradation of Personal Care Products in Water

Chemically treated kola nut pod as low-cost natural adsorbent for the removal of 2,4-dinitrophenol from synthetic wastewater: batch equilibrium, kinetic, and thermodynamic modelling studies

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