Studies on the removal of Pb(II) from wastewater by activated carbon developed from Tamarind wood activated with sulphuric acid

Singh, Chandan Kumar; Sahu, J.N.; Mahalik, K.; Mohanty, Chitta Ranjan; Mohan, B. Raj; Meikap, B.C.

doi:10.1016/j.jhazmat.2007.08.043

Cited by 201 publications

(78 citation statements)

References 24 publications

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“…Autores como Lee et al (2014) y Caccin et al (2015 obtuvieron valores para la capacidad de adsorción muy superiores al obtenido en el presente trabajo, en las mismas condiciones de pH pero en un intervalo de tiempo mayor, lo que indica que el factor tiempo contribuye de manera notable en la adsorción del analito. Sin embargo, otros autores como Singh et al (2008) …”

Section: Capacidad De Adsorción En El Equilibriounclassified

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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Section: Capacidad De Adsorción En El Equilibriounclassified

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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“…The effect of different chemical reagents on the production and quality of activated carbon was studied extensively by different researchers [20,21]. Different chemicals are used like Zinc chloride (ZnCl 2 ), phosphoric acid (H 3 PO 4 ), Sulphuric acid (H 2 SO 4 ), potassium hydroxide (KOH), sodium hydroxide (NaOH), and K 2 CO 3 [22][23][24]. Chemical activation is better than physical activation process because it generally takes place at a lower temperature and shorter time and the development of a porous structure is better than that of physical activation.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Activated Carbon from Green Coconut Shell and its Characterization

Das¹,

Samal²,

Bc³

2015

J Chem Eng Process Technol

146

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In this work activated carbon was prepared from green coconut shells by chemical activation method. It was then characterized by XRD, SEM, FT-IR and TGA. Different physical properties such as bulk density, moisture content, volatile matter content, ash content, and surface area and porosity were also determined. The activated carbon was used as adsorbent for the removal of carbon dioxide from flue gas as well as various inorganic contaminants from waste water. Removal efficiency of Methylene blue was studied by changing various parameters such as adsorbent dosage and contact time. This study showed that for the removal of various pollutants from flue gas and waste water treatment activated carbon can be used as a good adsorbent.

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“…Activated carbon has been chosen as an adsorptive media for removal of lead by many researchers (Goel et al, 2005;Issabayeva et al, 2006;Singh et al, 2008;Mohanty 2005). It is widely used as adsorbent in wastewater and gas treatments as well as in catalysis.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and equilibrium studies of Pb2+ in removal from aqueous solutions by use of nano-silversol-coated activated carbon

Kumar¹,

Vincent²,

Kirthika³

et al. 2010

Braz. J. Chem. Eng.

139

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-The ability of nano-silversol-coated activated carbon (NSSCAC) to adsorb Pb 2+ from aqueous solution has been investigated through batch experiments. The adsorption of lead onto NSSCAC has been found to depend on adsorbent dose, initial concentration and contact time. The experiments were carried out at natural solution pH. Equilibrium data fitted well with the Langmuir model and Freundlich model with a maximum adsorption capacity of 23.81 mg of Pb/g of NSSCAC. The experiments showed that the highest removal rate was 92.42% for Pb 2+ under optimal conditions. The sorption of Pb 2+ on NSSCAC was rapid during the first 30 min and the equilibrium attained within 60 min. The kinetic processes of Pb 2+ adsorption on NSSCAC were described by applying pseudo-first-order and pseudo-second-order kinetic models. The kinetic data for the adsorption process obeyed a pseudo-second-order kinetic model, suggesting that the adsorption process is chemisorption. The NSSCAC investigated in this study showed good potential for the removal of Pb 2+ from aqueous solution.

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Studies on the removal of Pb(II) from wastewater by activated carbon developed from Tamarind wood activated with sulphuric acid

Cited by 201 publications

References 24 publications

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

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

Preparation of Activated Carbon from Green Coconut Shell and its Characterization

Kinetics and equilibrium studies of Pb2+ in removal from aqueous solutions by use of nano-silversol-coated activated carbon

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