Activated carbon from Ceiba pentandra hulls, an agricultural waste, as an adsorbent in the removal of lead and zinc from aqueous solutions

Rao, M. Madhava; Rao, Gadupudi Purnachadra; Seshaiah, K.; Choudary, Nettem V.; Wang, M.C.

doi:10.1016/j.wasman.2007.01.017

Cited by 193 publications

(99 citation statements)

References 33 publications

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“…El tiempo para lograr equilibrio entre el analito contenido en la fase móvil y el adsorbente es uno de los parámetros más importantes a considerar en el momento de aplicar carbón activado en sistemas para el tratamiento de aguas (Rao et al 2008). Se estudió el efecto del tiempo de contacto en la adsorción de iones Pb 2+ sobre el carbón activado en un intervalo de 15 a 90 min.…”

Section: Optimización Del Tiempounclassified

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: Optimización Del Tiempounclassified

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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“…and Zn 2? from aqueous solutions has been investigated by Rao et al (2008) in the batch tests, including solution pH, contact time, adsorbent dose and initial metal ion concentration. Maximum removals of Pb 2?…”

Section: Kapok (Ceiba Pentandra) Hullsmentioning

confidence: 99%

Applications on agricultural and forest waste adsorbents for the removal of lead (II) from contaminated waters

Saka

Şahi̇n

Küçük

2012

Int. J. Environ. Sci. Technol.

135

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At present, there is growing interest in using low cost, commercially available materials for the adsorption of heavy metals. The major advantages of adsorption technologies are its effectiveness in reducing the concentration of heavy metal ions to very low levels and the use of inexpensive adsorbent materials. In this review, agricultural and forest waste adsorbents were used to remove Pb 2? ions in wastewater treatment, and their technical feasibilities were reviewed in studies mainly from 2000 to 2010. They all were compared with each other by metal binding capacities, metal removal performances, sorbent dose, optimum pH, temperature, initial concentration and contact time. Although commercial activated carbon is widely used in wastewater treatment applications, it has high costs. The use of agricultural by-products as adsorbent material to purify heavy metal contaminated water has become increasingly popular through the past decade because they are less expensive, biodegradable, abundant and efficient. Instead of activated carbon, this study was focused on the inexpensive materials such as agricultural and forest waste. It was shown that these alternative adsorbents had sufficient binding capacity to remove Pb 2? ions from wastewater.

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“…Kapok fiber has the characteristics of a large lumen and the hydrophobic-oleophilic so suitable for use as (i) an absorbent to remove methylene blue from aqueous solution (Shim et al 2013), (ii) absorption of the oil and separator filter of oil with water Abdullah et al 2010;Wang et al 2012), (iii) removal of hazardous material because it has a uniform morphology (Hwang et al 2013). Waste of kapok seed husks could be used as activated carbon to remove copper, cadmium (Rao et al 2006) and lead, zinc (Rao et al 2008) in aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Premixed Combustion of Kapok (ceiba pentandra) seed oil on Perforated Burner

Wirawan

Wardana

Soenoko

et al. 2014

Int. J. Renew. Energy Dev.

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Availability of fossil fuels in the world decrease gradually due to excessive fuel exploitation. This situations push researcher to look for alternative fuels as a source of renewable energy, one of them is kapok (ceiba pentandra) seed oil. The aim this study was to know the behavior of laminar burning velocity, secondary Bunsen flame with open tip, cellular and triple flame. Premixed combustion of kapok seed oil was studied experimentally on perforated burner with equivalence ratio (φ) varied from 0.30 until 1.07. The results showed that combustion of glycerol requires a large amount of air so that laminar burning velocity (SL) is the highest at very lean mixture (φ =0.36) in the form of individual Bunsen flame on each of the perforated plate hole. Perforated and secondary Bunsen flame both reached maximum SL similar with that of ethanol and higher than that of hexadecane. Slight increase of φ decreases drastically SL of perforated and secondary Bunsen flame. When the mixture was enriched, secondary Bunsen and perforated flame disappears, and then the flame becomes Bunsen flame with open tip and triple flame (φ = 0.62 to 1.07). Flame was getting stable until the mixture above the stoichiometry. Being isolated from ambient air, the SL of perforated flame, as well as secondary Bunsen flame, becomes equal with non-isolated flame. This shows the decreasing trend of laminar burning velocity while φ is increasing. When the mixture was enriched island (φ = 0.44 to 0.48) and petal (φ = 0.53 to 0.62) cellular flame take place. Flame becomes more unstable when the mixture was changed toward stoichiometry.

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Activated carbon from Ceiba pentandra hulls, an agricultural waste, as an adsorbent in the removal of lead and zinc from aqueous solutions

Cited by 193 publications

References 33 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

Applications on agricultural and forest waste adsorbents for the removal of lead (II) from contaminated waters

Premixed Combustion of Kapok (ceiba pentandra) seed oil on Perforated Burner

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