Removal of the persistent pollutant chlorobenzene by adsorption onto activated montmorillonite

Sennour, Radia; Mimane, G.; Benghalem, A.; Taleb, Safia

doi:10.1016/j.clay.2008.06.019

Cited by 38 publications

(25 citation statements)

References 10 publications

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“…These compounds can cause toxic effects on both human health and environmental systems, even at low concentration [1]. In particular, the Environmental Protection Agency (EPA) fixed the maximum contaminant level (MCL) of CB at 0.1 mg/L; above this threshold value CB can cause negative health effects, such as gastrointestinal irritations, hepatoxicity and kidney damages [2].…”

Section: Introductionmentioning

confidence: 99%

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

et al. 2018

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Abstract:In this work, the capability of two commercial high silica zeolites (HSZs), namely ZSM-5 and Y, for the removal of chlorobenzene (CB) from water was investigated by combining chromatographic and diffractometric techniques. The adsorption isotherms and kinetics of CB on ZSM-5 and Y zeolites were determined from batch tests. The adsorption kinetics were very fast; the time to reach equilibrium was less than 10 min. The equilibrium data of CB on the two HSZs showed dissimilarities that are particularly evident in the adsorption data concerning the low concentration range, where Y zeolite is characterized by low adsorption. On the contrary, at higher solution concentrations the adsorption capacity of Y is higher than that of ZSM-5. The crystalline structures of Y and ZSM-5 saturated with CB were investigated by X-ray diffraction (XRD) techniques. Rietveld refinement analyses of XRD data allowed for quantitative probing of the structural modifications of both zeolites after CB adsorption and provided insight into the preferred zeolite adsorption sites in both microporous materials. The refined framework-extraframework bond distances confirm that interactions between the selected organic contaminant and hydrophobic zeolites are mediated via co-adsorbed H 2 O. The occurrence of H 2 O-CB-framework oxygen oligomers explains variations in both the unit cell parameters and the shape of the channels, clearly confirming that water plays a very relevant role in controlling the diffusion and adsorption processes in hydrophobic zeolites.

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Section: Introductionmentioning

confidence: 99%

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

et al. 2018

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“…Table 2 shows that q m of CB on PHBBMA was 165.91 mg g −1 according to Langmuir model at 30 • C, but q m in unit surface area was 19.6 mg m −2 since its surface area was only 8.45 m 2 g −1 . Sennour et al reported that q m of CB on activated montmorillonite with BET surface area of 250 m 2 g −1 was 174.8 mg g −1 according to Langmuir model at 28 • C, but q m in unit surface area was only 0.7 mg m −2 [43]. The result showed that PHBBMA had a potential advantage and could increase adsorption capacity through increasing surface area.…”

Section: Adsorption Isothermsmentioning

confidence: 85%

“…It was because that adsorption capacity was positive correlation with the affinity between PHBBMA and chemicals, and CB had more strong affinity than o-NCB due to absence of -NO 2 . The adsorption capacity had a negative effect on the temperature because the octanol-water partition coefficient (K ow ) decreased and aqueous solubility increased with the temperature increasing for CB [43]. That is the affinity between CB and PHBBMA decreased when the temperature increased.…”

Section: Adsorption Isothermsmentioning

confidence: 93%

Enrichment of chlorobenzene and o-nitrochlorobenzene on biomimetic adsorbent prepared by poly-3-hydroxybutyrate (PHB)

Zhang

Wei

et al. 2010

Journal of Hazardous Materials

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“…Briefly, 10 g of soil (dry weight equivalent) and 100 mL of initial solution in a flask were continuously stirred at 120 rpm in the dark, and the purpose of the design is to simulate the continuous reaction of the adsorption CB during artificial recharge, in order to make experimental conditions more close to aquifer and adequately reaction. The equilibrium time was less than 24 h according to preliminary studies (Sennour et al 2009;Zhang et al 2010). Samples were taken at 1, 2, 4, 6, 8, 10, 12, 18 and 24 h.…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

“…The adsorption of CB properties by different materials have been researched according to the series of experiments, the finer the particle size of the materials, the better the adsorption effect (Long and Li 2010;Guo and Li 2010). The main factor influencing the adsorption of CB in aquifers was temperature, in a certain temperature range, the higher the temperature, the better adsorption effect (Zhao et al 2001;Qi et al 2010;Sennour et al 2009). In addition, some studies have indicated that CB could undergo degradation by both photolysis and microbial biodegradation in water and soil (USEPA 1995;Loannis and Dimitrios 2006;Turlough 2008).…”

Section: Introductionmentioning

confidence: 99%

Natural attenuation of chlorobenzene in a deep confined aquifer during artificial recharge process

Huang

et al. 2015

Int. J. Environ. Sci. Technol.

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This paper discusses natural attenuation of chlorobenzene (CB) elimination in a deep confined aquifer in a certain test site in China during a groundwater artificial recharge process. Pilot-scale experiments were conducted in laboratory, including adsorption and biodegradation experiments. The results from the adsorption experiments indicated that the adsorption rate increased within the temperature range 0-20°C. Processes were fitted to the pseudo-first-order and pseudo-second-order kinetic equations, Freundlich and Langmuir models. Maximal amounts of adsorption were 20.747, 21.505 and 23.364 lg/g at 0, 10 and 20°C, respectively. The adsorption of CB was an endothermic process. The results from the biodegradation experiments indicated that the processes were well fitted by the Monod and first-order decay kinetics equations at different temperatures. It showed that the Monod l max changed from 0.0314 to 0.0387 h -1 , and the half-life (t 1/2 ) decreased from 3.02 to 1.46 d with an increase in temperature from 0 to 20°C. The influence of temperature on the biodegradation rate was expressed by the Arrhenius equation. This study provides information on the mechanisms of natural attenuation of CB in the subsurface environment, whilst also providing the necessary technical information for the security of artificial recharge implementation.

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Removal of the persistent pollutant chlorobenzene by adsorption onto activated montmorillonite

Cited by 38 publications

References 10 publications

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

Enrichment of chlorobenzene and o-nitrochlorobenzene on biomimetic adsorbent prepared by poly-3-hydroxybutyrate (PHB)

Natural attenuation of chlorobenzene in a deep confined aquifer during artificial recharge process

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