The adsorptive properties of powdered carbon materials with a strongly differentiated porosity and their applications in electroanalysis and solid phase microextraction

Kuśmierek, Krzysztof; Sankowska, Monika; Skrzypczyńska, Katarzyna; Świątkowski, Andrzej

doi:10.1016/j.jcis.2015.01.038

Cited by 16 publications

(14 citation statements)

References 35 publications

(39 reference statements)

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“…The L2S powdered activated carbon (Ceca, France) was used in this experiment. The specific surface area (S BET ), the micropore (V mi ) and the mesopore (V me ) volumes were 925 m 2 g -1 , 0.245 and 0.235 cm 3 g -1 [23]. Prior to use, the activated carbon was dried in an oven at 120°C to a constant weight and kept in a desiccator for further study.…”

Section: Chemicals and Reagentsmentioning

confidence: 99%

The removal of chlorophenols from aqueous solutions using activated carbon adsorption integrated with H2O2 oxidation

Kuśmierek

2016

Reac Kinet Mech Cat

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The removal of eight chlorophenols (2-CP, 3-CP, 4-CP, 2,3-DCP, 2,4-DCP, 2,5-DCP, 2,6-DCP and 2,4,6-TCP) using adsorption on activated carbon and adsorption in the presence of hydrogen peroxide was investigated. The influence of the pH, activated carbon dosage and hydrogen peroxide concentration were studied. The effects of the chlorine atom position and the chlorine content in the chlorophenol molecules on their degradation were also studied. The results revealed that the integration of the activated carbon and H 2 O 2 treatment was more effective for the removal of the chlorophenols than using the activated carbon alone. The adsorption kinetics and adsorption efficiency increased with the increasing substitution of chlorine on the aromatic ring. The degradation rate and degradation efficiency of the chlorophenols using the activated carbon integrated with H 2 O 2 decreased with the increasing chlorine atoms in the molecule. The combination of the activated carbon with hydrogen peroxide may significantly enhance the process and could offer an interesting alternative in wastewater treatment.

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Section: Chemicals and Reagentsmentioning

confidence: 99%

The removal of chlorophenols from aqueous solutions using activated carbon adsorption integrated with H2O2 oxidation

Kuśmierek

2016

Reac Kinet Mech Cat

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“…The SPME fibers were prepared with the use of sol-gel technology, as described elsewhere [24]. The coating process was repeated six times by using a freshly prepared sol solution each time.…”

Section: Solid Phase Microextractionmentioning

confidence: 99%

“…Carbon materials have long been used as adsorbents for trapping or separation of organic compounds [17][18][19][20]. In SPME, carbon materials, such as polycrystalline graphite [21], glassy carbon [22], activated carbon [23,24], fullerene [25], graphene [26,27], carbon black [24] and CNTs [28][29][30][31], have been successfully used as SPME fibers.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of different carbon materials in adsorption and solid-phase microextraction of 2,4,6-trichlorophenol from water

Kuśmierek¹,

Borucka²,

Świątkowski³

et al. 2019

Desalination and Water Treatment

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The adsorption process of 2,4,6-trichlorophenol (TCP) by carbonaceous materials, such as Carbopack B graphitized carbon black, Vulcan XC72 carbon black and two kinds of multi-walled carbon nanotubes, have been studied. The adsorption kinetics was best represented by the pseudo-second order kinetic model. Adsorption took place in accordance with the Freundlich equation. The materials were used to prepare novel, solid-phase microextraction (SPME) fibers. The efficiency of the fibers was evaluated using a gas chromatograph with an atomic emission detector for the extraction of TCP from the headspace of aqueous samples. Both the carbon nanotubes and carbon blacks coated fibers were of higher quality than commercially available fibers prepared from polydimethylsiloxane and polyacrylate. The results proved the ability of the proposed SPME fibers to detect TCP in water.

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“…Chociaż PAC jest stosowany rzadziej, jego właści-wości adsorpcyjne nie ustępują granulowanym węglom aktywnym. Skuteczność pylistych węgli aktywnych wykazano w procesach usuwania z wody metali [5], naturalnych rozpuszczonych substancji organicznych [6,7] czy też chlorofenoli [8][9][10][11].…”

Section: Wstępunclassified

“…Obliczone na ich podstawie wielkości powierzchni właściwej S BET , objętości mikroporów V mi i mezoporów V me podano w tabeli 1. Uzyskane rezultaty pomiarów pozostają w zgodzie z wcześniej opublikowanymi wynikami [10,12]. …”

Section: Wyniki I Dyskusjaunclassified

Adsorption of Phenols from Aqueous Solutions on Powdered Activated Carbons

Dąbek

Kuśmierek

Świątkowski

2016

Eng. Prot. Environ.

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The adsorption process by solid adsorbents is one of the most efficient methods for the removal of organic pollutants from water. Adsorption is attractive for its relative flexibility and simplicity of design, low cost, ease of operation and regeneration. Activated carbons are now the most commonly used adsorbents of proven adsorption efficiency for organic compounds due to their physicochemical properties including specific surface area, pore volume, pore size distribution and surface chemistry. For water treatment on a commercial scale granular activated carbon is most commonly used. In this paper the adsorption of phenol (Ph) and 4-cresol (4K) from aqueous solutions on powdered activated carbons (PAC) was studied. As adsorbents, two activated carbons L2S and SX2 with similar physicochemical properties were used. The adsorption was studied in a batch adsorption system, including both kinetics and equilibrium. The kinetics was fitted with the pseudo-first order and pseudo-second order models. The adsorption kinetics was found to follow the pseudo-second order model with the coefficient of determination values greater than 0.99. The adsorption isotherms were determined and modeled with the Freundlich and Langmuir equations. The equilibrium data obtained for both adsorbates were better described by the Langmuir model than by the Freundlich isotherm model. It was found that the 4K was adsorbed better than Ph on both adsorbents. The adsorption capacities of the L2S and SX2 activated carbons towards phenols were comparable. The values of the Langmuir adsorption capacity qm for phenol were 1.634 and 1.591 mmol/dm 3 for the L2S and SX2 activated carbons, respectively. The qm values for 4-cresol were 1.885 and 1.844 mmol/dm 3 for the L2S and SX2, respectively. The influence of solution pH on the adsorption was also investigated. The adsorption of the Ph and 4K was almost constant from the pH 2 to 8, and decreased significantly with further increase in the pH (above the pKa of the adsorbates and pHPZC of the adsorbents).

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The adsorptive properties of powdered carbon materials with a strongly differentiated porosity and their applications in electroanalysis and solid phase microextraction

Cited by 16 publications

References 35 publications

The removal of chlorophenols from aqueous solutions using activated carbon adsorption integrated with H2O2 oxidation

The removal of chlorophenols from aqueous solutions using activated carbon adsorption integrated with H2O2 oxidation

Evaluation of different carbon materials in adsorption and solid-phase microextraction of 2,4,6-trichlorophenol from water

Adsorption of Phenols from Aqueous Solutions on Powdered Activated Carbons

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