Removal of lead(II) ions from aqueous solutions by adsorption onto pine cone activated carbon

Momčilović, Miloš; Purenović, Milovan M.; Bojić, Aleksandar; Zarubica, Aleksandra; Ranđelović, Marjan S.

doi:10.1016/j.desal.2011.03.013

Cited by 420 publications

(175 citation statements)

References 31 publications

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“…Spectra band observed at 2,929.4 cm -1 represents the aliphatic C-H group. Both raw and Zn-loaded PC biochar exhibit the peaks at around 1,614.20 cm -1 which can be ascribed to the C=O asymmetric stretching of ketones, aldehydes, lactones, or carboxyl groups (Momcilovic et al 2011). The peaks in between 1,517.78-1,450.28 cm -1 represent the presence of aromatic rings or rings with C=C bonds.…”

Section: Physico-chemical Characterization Of Pc Biocharmentioning

confidence: 99%

Arsenic(III) removal from aqueous solution by raw and zinc-loaded pine cone biochar: equilibrium, kinetics, and thermodynamics studies

Vinh

Zafar

Behera

et al. 2014

Int. J. Environ. Sci. Technol.

152

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The potential of raw pine cone (PC) biochar and its modified form (Zn-loaded biochar) was evaluated for the removal of trivalent arsenic [As(III)] from the aqueous solution. The influence of treatment of PC biochar with Zn(NO 3 ) 2 on the physico-chemical properties of biochar was examined using elemental analyzer, surface area analyzer, thermo-gravimetric analyzer, Fourier transform infrared spectroscopy, and scanning electron microscopy. Experimental results revealed that the removal of As(III) was almost consistent (66.08 ± 3.94 and 87.62 ± 3.88 % on raw and Zn-loaded biochar, respectively) over an acidic pH range of 2-4 as a consequence of high affinity between the positively charged biochar surface and the predominant arsenic species (H 3 AsO 3 and H 2 AsO 4 -), followed by a decrease with increase in pH in the range of 4-12. Langmuir isotherm model was well fitted to the experimental equilibrium data (R 2 = 0.93) rendering the maximum adsorption capacity of 5.7 and 7.0 lg g -1 on raw and Znloaded PC biochar, respectively. The adsorption of As(III) was well represented by pseudo-second order with reaction rate constant (k 2 ) of 0.040 and 0.282 mg g -1 min on raw and zinc-loaded PC biochar, respectively, and was mainly controlled by boundary layer diffusion followed by some extent of intra-particle diffusion. The adsorption process was spontaneous with Gibb's free energy (DG°, -4.42 ± 0.72 and -11.86 ± 1.78 kJ mol -1 ) and exothermic in nature with enthalpy (DH°, 13.25 and 31.10 kJ mol -1) and entropy (DS°, 0.058 and 0.141 kJ mol -1 K -1 ) for raw and zinc-loaded adsorbent, respectively.

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Section: Physico-chemical Characterization Of Pc Biocharmentioning

confidence: 99%

Arsenic(III) removal from aqueous solution by raw and zinc-loaded pine cone biochar: equilibrium, kinetics, and thermodynamics studies

Vinh

Zafar

Behera

et al. 2014

Int. J. Environ. Sci. Technol.

152

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“…En la actualidad es de gran interés la remoción de metales pesados del agua de consumo y de aguas residuales, empleando en general materiales adsorbentes o procesos de limpieza amigables con el ambiente. Los métodos más utilizados para tal fin son: intercambio iónico, precipitación química, ósmosis inversa y filtración con membranas de adsorción, electrodiálisis y electroflotación (Mohammadi et al 2010, Momcilovic et al 2011, Rondón et al 2013). La remediación de aguas con materiales adsorbentes como el carbón activado ha sido reconocido como un método eficaz para la eliminación de iones de metales pesados de las aguas residuales, debido a la disponibilidad del material, eficiencia satisfactoria y características favorables de la superficie física y química del material adsorbente .…”

Section: Introductionunclassified

SÍNTESIS DE CARBÓN ACTIVADO A PARTIR DE EPICARPIO DE Attalea macrolepis Y SU APLICACIÓN EN LA REMOCIÓN DE Pb2+ EN SOLUCIONES ACUOSAS

Ramos¹,

Rondón

Astudillo³

et al. 2017

Rev. Int. Contam. Ambie.

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Palabras clave: residuo vegetal, pirólisis, isotermas, adsorción química RESUMEN En este trabajo se sintetizó carbón activado a partir del epicarpio de Attalea macrolepis y se evaluó como adsorbente para la remoción de iones Pb 2+ . El pH, la masa del adsorbente, el tiempo y la concentración inicial de plomo se evaluaron como pará-metros influyentes en el proceso de adsorción. Por otro lado, se evaluó el mecanismo de adsorción de los iones de plomo sobre el carbón activado usando los modelos de Langmuir, Freundlich y Dubinin-Radushkevich. Mediante espectroscopía infrarroja con transformada de Fourier en el material adsorbente se identificaron los grupos funcionales hidroxilos, carboxilatos, olefinas y anillos bencénicos. Por medio de microscopía electrónica de transmisión se evidenció una matriz de partículas aglomeradas heterogéneas de tamaño comprendido entre 149 a 185 nm. Las condiciones óptimas obtenidas para la remoción de 70 % de iones Pb 2+ (5 mg/L) fueron a pH 5, una masa de adsorbente de 150 mg, un tiempo de contacto de una hora, una agitación de 1500 rpm y un volumen de 25 mL. A partir de las isotermas se obtuvo una capacidad máxima de adsorción de 0.500 mg/g. La energía de adsorción calculada a partir del modelo de Dubinin-Radushkevich fue de 10.42 KJ/mol, este valor energético permite inferir que en el sistema carbón activado-iones Pb 2+ ocurre una adsorción química. Los resultados demuestran que el carbón activado producido con el epicarpio de Attalea macrolepis es un adsorbente alternativo de bajo costo y amigable con el ambiente para remover Pb 2+ de sistemas acuosos.

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“…Lead is found in wastewater from industries such as battery, ceramic and glass manufacturing, metal plating and finishing, printing and tanning, and production of lead additives from gasoline [2]. The techniques to remove lead from water include ion exchange, chemical precipitation, reverse osmosis, evaporation, membrane filtration and adsorption [3].…”

Section: Introductionmentioning

confidence: 99%

Coconut coir activated carbon: an adsorbent for removal of lead from aqueous solution

Chaudhuri

Saminal

2011

WIT Transactions on Ecology and the Environment

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The purpose of this study was to prepare activated carbon from an agricultural solid waste and assess its effectiveness in adsorptive removal of lead from aqueous solution. Activated carbon was prepared from coconut coir and its characteristics were compared with that of a commercial bituminous coal-based activated carbon. The coconut coir activated carbon possessed higher surface and micropore areas, micropore volume and average pore diameter, and well developed meso-and micropores. Adsorption of lead from aqueous solution by the coconut coir activated carbon was examined. Batch adsorption test showed that extent of adsorption was dependent on lead concentration, contact time, pH and activated carbon dose. Adsorption was low at acidic pH and increased up to pH 5, with marginal increase up to pH 6. Equilibrium adsorption was attained in 2.5 h. Lead adsorption followed pseudo-second order kinetics. Equilibrium lead adsorption data for the coconut coir activated carbon and commercial activated carbon were described by the Langmuir and Freundlich isotherm models. Coconut coir activated carbon showed higher lead adsorption capacity [7.75 (Langmuir)

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Removal of lead(II) ions from aqueous solutions by adsorption onto pine cone activated carbon

Cited by 420 publications

References 31 publications

Arsenic(III) removal from aqueous solution by raw and zinc-loaded pine cone biochar: equilibrium, kinetics, and thermodynamics studies

Arsenic(III) removal from aqueous solution by raw and zinc-loaded pine cone biochar: equilibrium, kinetics, and thermodynamics studies

SÍNTESIS DE CARBÓN ACTIVADO A PARTIR DE EPICARPIO DE Attalea macrolepis Y SU APLICACIÓN EN LA REMOCIÓN DE Pb2+ EN SOLUCIONES ACUOSAS

Coconut coir activated carbon: an adsorbent for removal of lead from aqueous solution

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