Chemical-activated carbons from peach stones for the adsorption of emerging contaminants in aqueous solutions

Torrellas, Silvia Álvarez; Lovera, Rafael García; Escalona, N.; Sepúlveda, Catherine; Sotelo, J.L.; Garcı́a, Juan

doi:10.1016/j.cej.2015.05.104

Cited by 207 publications

(70 citation statements)

References 53 publications

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“…Similar results were reported for the adsorption of Cbz onto the granular activated carbon obtained from peach seeds [20]. Nevertheless, although the activated carbon studied here exhibited a much higher adsorption capacity compared with other more selective adsorbents like clay minerals, industrial and agricultural wastes [7] [11], the time required to reach equilibrium was six days for Mp and over 14 days for Cbz and Sil.…”

Section: Resultssupporting

confidence: 65%

Adsorption of Pharmaceuticals and Personal Care Products on Granular Activated Carbon

Delgado¹,

Capparelli²,

Marino³

et al. 2016

JSEMAT

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We investigated the adsorption to granular activated carbon of two pharmaceuticals (carbamazepine and sildenafil citrate) and a personal-care product (methylparaben) in aqueous solution, characterized the carbon, and evaluated its influence on the kinetics and adsorption equilibrium of the compounds under study. We adjusted data for the analysis of equilibrium to Langmuir and Freundlich models of adsorption isotherms and described adsorption rate using pseudo first-and second-order models; that same analysis was made on the basis of the behavior of the initial rate. In addition, we analyzed the potentiality of a nonlinear adjustment for studying kinetics and equilibrium of adsorption, an approach requiring neither knowledge of equilibrium conditions nor a-priori hypothetical suppositions regarding the order of reaction. The results indicated that the nonlinear model was capable of describing adsorption kinetic behavior, in order to determine concentrations adsorbed at equilibrium, adsorption rates of the system, maximum adsorption capacity, and global rate constant. Granular carbon exhibited an adsorption capacity for carbamazepine and methylparaben of ca. 323 mg/g and for sildenafil citrate of ca. 142 mg/g, though with slow adsorption kinetics characterized by average adsorption times of at least 168 h.

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Section: Resultssupporting

confidence: 65%

Adsorption of Pharmaceuticals and Personal Care Products on Granular Activated Carbon

Delgado¹,

Capparelli²,

Marino³

et al. 2016

JSEMAT

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show abstract

“…The major advantages of adsorption against the conventional physicochemical treatments (chlorination, coagulation, flocculation, membranes) and advanced oxidation processes (ozonation, ultraviolet and gamma radiation, electro-oxidation) are that (1) no toxic or pharmacologically active intermediate products are generated, and (2) adsorbents are likely to be reused. Moreover, adsorption offers the possibility of using low-cost and easily available precursors, such as biomass wastes, to synthesize activated carbon adsorbents (Jodeh et al 2015;Fernandez et al 2015;Saucier et al 2015;Torrellas et al 2015).…”

Section: Introductionmentioning

confidence: 99%

High efficacy on diclofenac removal by activated carbon produced from potato peel waste

Bernardo

Rodrigues

Lapa

et al. 2016

Int. J. Environ. Sci. Technol.

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In the present study, a novel porous carbon obtained by K 2 CO 3 activation of potato peel waste under optimized conditions was applied for the first time as liquid-phase adsorbent of sodium diclofenac in parallel with a commercial activated carbon. The biomass-activated carbon presented an apparent surface area of 866 m 2 g -1 and well-developed microporous structure with a large amount of ultramicropores. The obtained carbon presented leaching and ecotoxicological properties compatible with its safe application to aqueous medium. Kinetic data of laboratorymade and commercial sample were best fitted by the pseudo-second-order model. The commercial carbon presented higher uptake of diclofenac, but the biomass carbon presented the higher adsorption rate which was associated with its higher hydrophilic nature which favoured external mass transfer. Both adsorbents presented adsorption isotherms that were best fitted by Langmuir model. The biomass carbon and the commercial carbon presented adsorption monolayer capacities of 69 and 146 mg g -1 , and Langmuir constants of 0.38 and 1.02 L mg -1 , respectively. The better performance of the commercial sample was related to its slightly higher micropore volume, but the most remarkable effect was the competition of water molecules in the biomass carbon.

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“…and a well-developed mesoporous structure, which was attributed to the activation and pore-forming effects of ZnCl2 on the hemicelluloses, cellulose, and lignin of rice straw during the pyrolysis process (Torrellas et al 2015). It was noteworthy that the Fe content increased from 0.24% to 15.8% when iron-containing sludge was added to RSC; this addition did not appreciably change the pore size diameter distribution or the specific surface area.…”

Section: Characteristics Of the Prepared Cpesmentioning

confidence: 84%

Advanced Treatment of Paper Mill Wastewater Using Electro-Fenton Process with Novel Catalytic Particle Electrodes

et al. 2018

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Waste rice straw and iron-containing sludge were converted into catalytic particle electrodes (CPEs). The CPEs were tested for their ability to strengthen electro-Fenton (EF) oxidation of real paper mill wastewater. The prepared CPEs were characterized by different techniques including scanning electron microscopy, X-ray diffraction, BET surface area, and Xray fluorescence. The CPEs exhibited excellent electro-catalytic activity and appreciably reduced the levels of pollutant parameters during EF process at near neutral pH conditions. Additionally, the treated wastewater was more biodegradable and had lower toxicity, which met Chinese effluent discharge criteria. Optimized treatment conditions used were a current density of 10 mA/cm 2 , a CPEs dosage of 1.0 g/L, and an aeration rate of 5 L/min. Based on the measurements of H2O2 and hydroxyl radicals ( • OH), the enhancement of catalytic activity was attributed to more in situ • OH being produced from the H2O2 which was generated from dissolved oxygen (DO). Moreover, the CPEs showed superior stability, and successive recycle runs were completed with efficient and economical application advantages.

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Chemical-activated carbons from peach stones for the adsorption of emerging contaminants in aqueous solutions

Cited by 207 publications

References 53 publications

Adsorption of Pharmaceuticals and Personal Care Products on Granular Activated Carbon

Adsorption of Pharmaceuticals and Personal Care Products on Granular Activated Carbon

High efficacy on diclofenac removal by activated carbon produced from potato peel waste

Advanced Treatment of Paper Mill Wastewater Using Electro-Fenton Process with Novel Catalytic Particle Electrodes

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