Simultaneous pentachlorophenol decomposition and granular activated carbon regeneration assisted by microwave irradiation

Liu, Xitao; Quan, Xie; Bo, Longli; Chen, Shuo; Zhao, Yongjie

doi:10.1016/j.carbon.2003.12.032

Cited by 182 publications

(105 citation statements)

References 25 publications

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“…This model is presented by the relation of Lagergren [29], based on the adsorbed quantity, is the first equation speed established to describe the kinetics of adsorption in a liquid/solid system. This model of pseudo-first-order is represented by the following relation [30]:…”

Section: Iii3 Adsorption Kineticsmentioning

confidence: 99%

Removal of a Cationic Dye -Méthylène Bleu- From Aqueous Solution by Adsorption onto Oil Shale Ash of Timahdit (Morocco)

Miyah¹,

Idrissi²,

Zerrouq³

2014

IJIRSET

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This article presents two aspects environnementals: valorization of oil shale ash (OSA) of oil industry on the one hand, and on the other hand to study the effectiveness of cation adsorption of dye such as the Methylene blue (BM) on material (OSA).In this context, we carried out a parametric study of adsorption, in particular, the time of contact, the pH, the amount of the adsorbent, the temperature and the stirring velocity. A study of the kinetics of adsorption was carried out by two models: pseudo-first order and pseudo-second order, and a modeling by the isotherms of adsorption while basing itself on the models of Langmuir and Frendlich. The maximum capacity of adsorption of BM on OSA is of 2,464 mg/g, for a concentration of BM of 5 mg/L, an amount of adsorbent of 2 g/L. Material OSA was characterized by several methods such as diffraction of x-ray (DRX), electronic scan microscopy (MEB), electronic microscopy in transmission (MET), x-ray fluorescence (FX), and the infra-red Spectroscopy with transforms of Fourier (FTIR). In addition, the economic aspect of the use of OSA makes important the re-use of these materials considering their capacity to regenerate itself.

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Section: Iii3 Adsorption Kineticsmentioning

confidence: 99%

Removal of a Cationic Dye -Méthylène Bleu- From Aqueous Solution by Adsorption onto Oil Shale Ash of Timahdit (Morocco)

Miyah¹,

Idrissi²,

Zerrouq³

2014

IJIRSET

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“…Because the chemical reduction occurs at the ZVI particle surface, k can be replaced by k sa and r a as (Lin et al, 2004;Liu et al, 2004):…”

Section: Resultsmentioning

confidence: 99%

“…For example, the MW radiation may also be combined with the adsorption capacity of granular activated carbon to treat pentachlorophenol (PCP) and phenol (Jou and Wu, 2006;Tai and Jou, 1999), improve the efficiency of TiO 2 photocatalyst (Jou et al, 2008b;Liao et al, 2010) with demonstrated energy savings efficiency improvement (Liu et al, 2004), and treat heavy-oil-contaminated sand (Chang et al, 2011). In this study, the characteristics of MW heating such as low reaction time to achieve rapid and selective heating are combined with the superb properties of ZVI particles as MW dielectric medium, including high specific surface area, surface reactivity, and permittivity loss factor, to decompose refractory linear aliphatic PCE and ringed PCP.…”

Section: Introductionmentioning

confidence: 99%

Microwave-induced nanoscale zero-valent iron degradation of perchloroethylene and pentachlorophenol

Lee¹,

Lin

Jou

2012

Journal of the Air & Waste Management Association

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Microwave (MW) is applied to enhance perchloroethylene (PCE) or pentachlorophenol (PCP) removal using zero-valent iron (ZVI; Fe 0 ) as the dielectric medium. ZVI has a much higher dielectric loss factor (39.5) than other media; it is capable of absorbing MW radiation rapidly to speed up the release of electrons, leading to rises of the ZVI particle surface temperature. If the MW power is continued, excessive electricity will accumulated inside ZVI particles, resulting in sparks. The results show that during the initial 5 sec (700 W), the linear aliphatic PCE has a faster decomposing rate than the ringed PCP (82.0% vs. 4.8%) because less energy is required for decomposing the linear-chlorine bond (90 kcal mol À1 ) than ring-chlorine bonds (95 kcal mol À1 ). Later, the removal rate for either PCE or PCP remains the same when the exposure time is between 5 and 60 sec. Without MW irradiation, linear PCE molecules have larger surface area to contact ZVI, and hence they have better removal efficiencies than PCP molecules. Using Fe 0 as a microwave dielectric medium to treat PCE or PCP is a new and worthwhile treatment technology; it is environmentally friendly, and its use will eliminate the secondary pollution.Implications: Nanoscale iron particles are characterized by high surface-area-to-volume ratios, high specific surface area, and high surface reactivity. With a much higher dielectric loss factor, it is capable of absorbing MW radiation rapidly to speed up the release of electrons, leading to rise in temperature. The time needed to achieve a satisfactory treatment is also reduced, leading to significant saving of energy consumption to make this method cost-effective and also environmentally friendly for the industry to pursuit sustainable development.

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“…This model is presented by the relation of Lagergren [33], based on the adsorbed quantity, is the first equation speed established to describe the kinetics of adsorption in a liquid/solid system. This model of pseudo-first-order is represented by the following relation [34]:…”

Section: Iii3 Adsorption Kineticsmentioning

confidence: 99%

Kinetics of Direct Yellow 50 Dye Adsorption onto Marble Powder Sorbents

Diouri¹,

Chaqroune²,

Kherbeche³

et al. 2014

IJIRSET

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ABSTRACT:The aim of this present work is evaluation of the effect of marble powder, which is an industrial discharge, in the adsorption of a direct "yellow 50" dye, used in traditional industries of textile. On the other hand, various techniques for characterizing the adsorbent were used, in particular X-ray Diffraction (XRD), X-ray Fluorescence spectroscopy, Scanning Electron Microscopy (SEM), Fourier Transform Infrared spectroscopy (FTIR) and Raman spectroscopy. The effect of various experimental factors; adsorbent dose, contact time (equilibrium is established after 20 minutes), dye concentration and pH media, were studied by using the batch technique. The isotherms of adsorption data were analyzed by various adsorption isotherm models such as Langmuir and Freundlich. The dye yellow adsorption by marble powder made have excellent performance related to the adsorption potential.

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Simultaneous pentachlorophenol decomposition and granular activated carbon regeneration assisted by microwave irradiation

Cited by 182 publications

References 25 publications

Removal of a Cationic Dye -Méthylène Bleu- From Aqueous Solution by Adsorption onto Oil Shale Ash of Timahdit (Morocco)

Removal of a Cationic Dye -Méthylène Bleu- From Aqueous Solution by Adsorption onto Oil Shale Ash of Timahdit (Morocco)

Microwave-induced nanoscale zero-valent iron degradation of perchloroethylene and pentachlorophenol

Kinetics of Direct Yellow 50 Dye Adsorption onto Marble Powder Sorbents

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