Sorption kinetics of polycyclic aromatic hydrocarbons removal using granular activated carbon: Intraparticle diffusion coefficients

Valderrama, César; Gamisans, Xavier; Heras, F. Xavier C. de las; Farrán, Adriana; Cortina, José Luis

doi:10.1016/j.jhazmat.2007.12.119

Cited by 258 publications

(125 citation statements)

References 27 publications

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“…Note that these isotherms are conditional in that they relate to different GAC-sediment mixing ratios as well as pseudoequilibrium. The use of pseudoequilibrium and pseudokinetic models is well established in the recent literature on sorption of PAHs to GAC [31,32,42]. Following Lesage et al [42] and Valderrama et al [32], we argue that, within short time intervals, sorption of PAHs takes place mainly in macro-and mesopores.…”

Section: Sorption Experimentsmentioning

confidence: 58%

“…The use of pseudoequilibrium and pseudokinetic models is well established in the recent literature on sorption of PAHs to GAC [31,32,42]. Following Lesage et al [42] and Valderrama et al [32], we argue that, within short time intervals, sorption of PAHs takes place mainly in macro-and mesopores. The micropore compartment is only relevant at much longer time scales [42], which are not relevant for our intended GAC application.…”

Section: Sorption Experimentsmentioning

confidence: 58%

“…However, for agitated suspensions, 28 d may be considered sufficient from an ex situ remediation perspective, for which equilibration times of months would be less relevant. In the present study, Freundlich and Langmuir sorption isotherms were used as conventional methods [31][32][33][34] to describe aqueous-to-sorbed concentration relations. Therefore, the associated constants obtained after 28 d of equilibration were identified as pseudoequilibrium constants (see below).…”

Section: Sorption Experimentsmentioning

confidence: 99%

“…Chem. 32,2013reactivity toward nonpolar organic compounds such as PAHs (Supplemental Data, Table S2). However, GAC 1240W had the smallest amount of basic functional groups among all tested carbons.…”

Section: Characterization and Extraction Efficiency Of Four Types Of mentioning

confidence: 99%

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Extraction of sediment‐associated polycyclic aromatic hydrocarbons with granular activated carbon

Rakowska

Kupryianchyk

Grotenhuis

et al. 2012

Enviro Toxic and Chemistry

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Abstract-Addition of activated carbon (AC) to sediments has been proposed as a method to reduce ecotoxicological risks of sedimentbound contaminants. The present study explores the effectiveness of granular AC (GAC) in extracting polycyclic aromatic hydrocarbon (PAH) from highly contaminated sediments. Four candidate GAC materials were screened in terms of PAH extraction efficiency using single-step 24-h GAC extractions, with traditional 24-h Tenax extraction as a reference. Subsequently, sorption of native PAHs to the best performing GAC 1240W (0.45-1.70 mm) was studied for sediment only and for GAC-sediment mixtures at different GAC-sediment weight ratios, using 76-mm polyoxymethylene (POM) passive samplers. Granular AC sorption parameters for PAHs were determined by subtracting the contribution of PAH sorption to sediment from PAH sorption to the GAC-sediment mixture. It appears that the binding of PAHs and the effectiveness of GAC to reduce sediment porewater concentrations were highly dependent on the GAC-sediment mixing ratio and hydrophobicity of the PAH. Despite the considerable fouling of GAC by organic matter and oil, 50 to 90% of the most available PAH was extracted by the GAC during a 28-d contact time, at a dose as low as 4%, which also is a feasible dose in field-scale applications aimed at cleaning the sediment by GAC addition and removal. Environ. Toxicol. Chem.

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Section: Sorption Experimentsmentioning

confidence: 58%

Section: Sorption Experimentsmentioning

confidence: 58%

Section: Sorption Experimentsmentioning

confidence: 99%

Section: Characterization and Extraction Efficiency Of Four Types Of mentioning

confidence: 99%

See 2 more Smart Citations

Extraction of sediment‐associated polycyclic aromatic hydrocarbons with granular activated carbon

Rakowska

Kupryianchyk

Grotenhuis

et al. 2012

Enviro Toxic and Chemistry

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“…大孔树脂(MARS)是人工合成的多孔交联聚合物微球, 作为一种分离材料, 已被广泛应用于许多领域, 如色谱分析 [82] 、分离纯化 [83,84] 、制药、食品工业和污水处理 [85] . 大孔树脂除了具有一般吸附剂的优势外, 还具备机械强度高、耐酸碱性好, 比表面积大, 具有多孔性、使用寿命长等优点, 使其具有广阔的发展前景 [86～88] .…”

Section: 离子液体固载于聚合物在吸附分离领域的应用unclassified

Research Advances on the Applications of Immobilized Ionic Liquids Functional Materials

Wang¹,

Li²,

Luo³

et al. 2018

Acta Chim. Sinica

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As the biomass energy and green chemistry processes have gained more and more attention from researchers, ionic liquids as a novel green solvent were widely concerned by research teams since 1990s, because of many excellent properties of chemical stability, low viscosity, high conductivity and so on. The research on the preparation methods and application fields is getting better, especially in the fields of catalytic reaction, photoelectron chemistry, materials chemistry and biomass pretreatment. However, some disadvantages such as large consumption, high cost, hard to separate, and complexity in purification process were appeared. Thus, in recent years, many scholars tried to immobilize ILs on inorganic porous materials or organic polymer materials by physical adsorption or chemical grafting. In this way, the characteristics of ILs were transferred to the polyphase solid catalysts, and it can be applied to the continuous and closed fixed-bed reactions. In this review, the development of immobilized ionic liquid technology were summarized in detail, and the current applications of immobilized ionic liquid were illustrated with a multi-angle. The immobilized ionic liquid as catalysts were used in chemical catalytic field depending on the chemical structure of ionic liquid; While the immobilized ionic liquid as a functional materials were used in adsorption separation field depending on the surface characteristic of solid carrier.

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Adsorption of anionic textile dye Acid Green 9 from aqueous solution onto weak or strong base anion exchangers

Dulman

Simion

Bârsănescu

et al. 2009

J of Applied Polymer Sci

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The aim of this work is to study the thermodynamic and kinetic studies with regard to the adsorption of Acid Green 9 (AG9) on the most efficient resin, namely, acrylic weak base anion exchange resin with ethylenediamine-functional groups (A1) selected from several anion exchange resins. The influence of the various experimental parameters such as, pH, initial dye concentration, contact time, temperature, and adsorbent dose was investigated by batch experiments. The extent of the dye adsorption increased with the decrease of the initial dye concentration and the increase of the contact time, temperature, and amount of the adsorbent. Adsorption process was quantitative and very fast at low concentrations of the dye. To investigate the mechanism of the adsorption and potential rate-controlling steps, pseudo first-and secondorder, as well as intraparticle diffusion kinetic equations have been used. The adsorption kinetic of AG9 dye from aqueous solution onto A1 could be described by the pseudo second-order reaction model. The obtained results are in agreement with the Langmuir and Freundlich models. In the optimum conditions established, an adsorption capacity of 500 mg textile dye (72% purity) g À1 adsorbent (at 293 K) was reached. Desorption experiments by batch and dynamic methods were performed using a solution of 0.05 mol L À1 NaOH. A series of 13 adsorption-desorption cycles were carried out by the dynamic method with a quantitative adsorption and the desorption efficiency higher than 95%.

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Sorption kinetics of polycyclic aromatic hydrocarbons removal using granular activated carbon: Intraparticle diffusion coefficients

Cited by 258 publications

References 27 publications

Extraction of sediment‐associated polycyclic aromatic hydrocarbons with granular activated carbon

Extraction of sediment‐associated polycyclic aromatic hydrocarbons with granular activated carbon

Research Advances on the Applications of Immobilized Ionic Liquids Functional Materials

Adsorption of anionic textile dye Acid Green 9 from aqueous solution onto weak or strong base anion exchangers

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