Sonochemical Degradation of Chlorinated Phenolic Compounds in Water: Effects of Physicochemical Properties of the Compounds on Degradation

Park, Jong‐Sung; Her, Namguk; Yoon, Yeomin

doi:10.1007/s11270-010-0501-2

Cited by 39 publications

(19 citation statements)

References 42 publications

(50 reference statements)

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“…Their toxicity and persistence can directly impact the health of ecosystems and present a threat through the contamination of water bodies (Ahmed et al 2011). Mono-and dichlorophenols are a major source of water pollution from industrial waste discharge (Park et al 2011). Therefore, due to these public health and environmental concerns, costeffective remedial strategies are needed.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Chlorophenols in Aqueous Solution by Excess Potassium Permanganate

Hossain

McLaughlan

2011

Water Air Soil Pollut

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A simple spectrophotometric method was developed to quantify chlorophenol (CP) concentrations after reaction with potassium permanganate and quenching with sodium sulfite. Other quenching agents (peroxide, sodium thiosulfate and hydroxylamine hydrochloride) were found to create absorbance in the spectral range required for CP quantification. Analysis at pH 12 gave greater absorption and sensitivity for the method compared with pH 5.6. The calibration curves of the proposed methods were linear in the concentration ranges 0.0061-0.61 and 0.0078-0.78 mM with detection limit of 0.0006 and 0.0008 mM for dichlorophenols and monochlorophenols, respectively. The oxidation kinetics of five chlorophenols in aqueous solution with excess potassium permanganate were evaluated using the analytical method. The pseudo-first-order reaction rates were found to be relatively rapid 1.42× 10 −3 to 0.024 s −1 and followed the sequence 2-chlorophenol (2-CP) > 2,6-dichlorophenol (2,6-DCP)> 4-chlorophenol (4-CP) > 2,4-dichlorophenol (2, 4-DCP)>3-chlorophenol (3-CP). The apparent second-order rate constant was calculated from the measured pseudo-first-order rate constant with respect to CP with initial KMnO 4 concentration (1.5 mM) and follows the same sequence of pseudofirst-order rate constant. This shows that chlorine atoms in the structure of chlorophenol had a significant influence on the oxidation of chlorophenols by potassium permanganate. Permanganate can be used for the treatment of chlorophenolcontaminated soil and groundwater.

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Section: Introductionmentioning

confidence: 99%

Oxidation of Chlorophenols in Aqueous Solution by Excess Potassium Permanganate

Hossain

McLaughlan

2011

Water Air Soil Pollut

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“…For each system, the amount of solute and water molecules in the simulation boxes was chosen in order to obtain compositions slightly below the solubility limit for each system and temperature [47][48][49][50]. In some cases (e.g., 2,4,6-trichlorophenol and pentachlorophenol) that choice was not feasible given the low solubility of the solutes in water.…”

Section: Systemsmentioning

confidence: 99%

Prediction of diffusion coefficients of chlorophenols in water by computer simulation

Martins

Parreira

Ramalho

et al. 2015

Fluid Phase Equilibria

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A B S T R A C TIntra-diffusion coefficients of seven chlorophenols (2-chlorophenol, 3-chlorophenol, 4-chlorophenol, 2,4-dichlorophenol, 2,6-dichlorophenol, 2,4,6-dichlorophenol and pentachlorophenol) in water were determined by computer simulation (molecular dynamics) for dilute solutions at three different temperatures and the corresponding mutual diffusion coefficients estimated. The mutual diffusion coefficients of 2-chlorophenol in water agree with the available experimental results from the literature for all the temperatures studied. From the dependence of the diffusion coefficients on temperature, diffusion activation energies were estimated for all the solutes in water. Analyzing the radial distribution functions and spatial distribution functions of water around chlorophenols sites enable a discussion about intermolecular interactions (dominated by hydrogen bonding) between solute and solvent and its importance on the relative magnitude of diffusion coefficients. Finally the mutual diffusion coefficients obtained by simulation were correlated by the well-known Wilke-Chang equation.

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“…The IMZ kinetic constant was higher, 6.38 ± 0.44 L MJ -1 (r 2 = 0.99) than the TBZ kinetic constant, 1.81 ± 0.29 L MJ -1 (r 2 = 0.94). These different degradation rates are determined by their physico-chemical properties, such as log(K OW ), water solubility (S w ), vapour pressure (Vp) and acid dissociation constant (pKa) ( Table 3) [29]. TBZ and IMZ are non-volatile compounds so their degradation inside the cavitation bubble due to high temperatures would be negligible.…”

Section: Efficiency and Mechanismmentioning

confidence: 99%