Preparation, characterization and evaluation of adsorptive properties of orange peel based activated carbon via microwave induced K2CO3 activation

Foo, K.Y.; Hameed, B.H.

doi:10.1016/j.biortech.2011.10.005

Cited by 358 publications

(136 citation statements)

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“…The preparation of activated carbon from phenolic resin (Williams and Parkes 2008) and cotton stalk (Deng et al 2010) using acid activation with microwave heating has been reported. Foo and Hameed prepared a series of activated carbons from wood sawdust (Foo and Hammed 2012a), mangosteen peels (Foo and Hameed 2012b), biodiesel industrial solid residues (Foo and Hameed 2012c), sunflower seed oil (Foo and Hameed 2011a), and orange peels (Foo and Hameed 2012d) via microwave-assisted K2CO3 activation. Based on their studies, intensifying the activation, e.g., by increasing impregnation ratios, microwave power, or radiation time, improves the BET surface area and mesopore ratio.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Pinewood- and Wheat Straw-based Activated Carbon via a Microwave-assisted Potassium Hydroxide Treatment and an Analysis of the Effects of the Microwave Activation Conditions

Mao¹,

Zhou²,

Hashisho³

et al. 2014

BioResources

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This study explored the effect of activated carbon preparation conditions on their adsorption performance. Pinewood and wheat straw were used as source materials to prepare activated carbon via a fast activation process using KOH and microwave heating. The iodine numbers and carbon yields were determined to evaluate the adsorption properties of the activated carbon. The effects of various KOH/char mass ratios, particle sizes, humidity levels, and microwave heating times on the physical characteristics of the activated carbon were investigated. The iodine number and yield and SEM images were used to characterize the activated carbon. Small particle sizes, the presence of humidity in the purge gas, and high KOH/char ratios resulted in higher iodine numbers. The best activated carbons were obtained using a KOH/char ratio of 3.0, a microwave power of 600 W, a radiation time of 30 min, and a particle size of 0.1 to 0.42 mm in a humid environment; these carbons showed iodine numbers of 2208 mg/g (pinewood activated carbon) and 1420 mg/g (wheat straw activated carbon), with carbon yields of 73% and 52%, respectively. Longer microwave heating times increased the iodine number. The iodine numbers and yields of the pinewood activated carbons were much higher than those of their wheat straw counterparts.

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Section: Introductionmentioning

confidence: 99%

Preparation of Pinewood- and Wheat Straw-based Activated Carbon via a Microwave-assisted Potassium Hydroxide Treatment and an Analysis of the Effects of the Microwave Activation Conditions

Mao¹,

Zhou²,

Hashisho³

et al. 2014

BioResources

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“…Aquí K f es la constante de Freundlich, n representa la intensidad de adsorción, q e es la cantidad de metal adsorbido en el equilibrio, y C eq es la concentración residual del metal en solución [16][17].…”

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Evaluación de la biosorción con bagazo de palma africana para la eliminación de Pb (II) en solución

et al. 2015

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RESUMENSe propone la adsorción de Pb (II) usando bagazo de palma tratado químicamente con ácido cítrico, se elige este material por ser un desecho agroindustrial ampliamente disponible en la región Caribe colombiana. Los experimentos fueron llevados a cabo en sistema batch en solución acuosa de plomo a una concentración de 100 ppm. La determinación de la concentración de metal al final del proceso se midió por absorción atómica. La caracterización de los materiales adsorbentes usados se hizo por FTIR encontrando que los grupos hidroxilos y carboxílicos son los principales responsables de la capacidad de adsorción. Además, fue encontrado que el pH es el factor de mayor incidencia en el proceso, siendo el de 6 el valor óptimo. Por otra parte, se encontró que el Pb (II) presenta una sorción rápida durante los primeros 10 minutos, además el modelo de Elovich fue el de mejor ajuste. La capacidad máxima de adsorción según la isoterma de Langmuir fue de 162 y 451 mg/g para el bagazo sin modificar y modificado respectivamente, estableciendo que la modificación fue altamente eficiente.Palabras Clave: Adsorbente, Plomo, Residuo, Remoción, Tratamiento químico. ABSTRACTIt was studied the adsorption of Pb (II) using palm bagasse chemically treated with citric acid. This material is chosen due to is an available waste in the Colombian Caribbean region. The experiments were carried out in batch system in aqueous solution of lead at a concentration of 100 ppm. The determination of the heavy concentration at the end of the process was measured by atomic absorption. The characterization of adsorbent materials used was carry out using FTIR. It was found that the hydroxyl and carboxyl groups are mainly responsible of adsorption capacities. Furthermore, it was found that the pH is the most prevalent factor in the process. The optimum value was 6. Moreover, it was found that the Pb (II) exhibits rapid sorption during the first 10 minutes. The process was better fitted by the Elovich model. The maximum adsorption capacity according to Langmuir isotherm was 162 and 451 mg/g for unmodified and modified bagasse respectively. It was established that the chemical treatment was highly efficient.

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“…The waste materials such as apricot stones [6], date stones [2], guava seeds [3] black stone cherries [7], peach stones [1 & 4], orange peel [5], Peanut shell [13] are the some examples of low-cost accessible waste materials for the production of activated carbons. Lapsi seed stone is the waste product of Lapsi fruits.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Activated carbons Prepared from a Locally Available Material by Iodine Number

Shrestha

2018

J. Inst. Engineering

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Abstract:The adsorption of Iodine by the activated carbons prepared from a locally available material Lapsi Seed Stone has been studied. Various activated carbons were prepared by varying the parameters such as ratio of Lapsi Seed Stone particles to Phosphoric acid, percentage of phosphoric acid concentration, carbonization temperature and carbonization time. Determination of Iodine numbers of the activated carbons was done by the standard method. The effect of various preparation conditions on Iodine number of different activated carbons is also investigated. The optimum conditions for the preparation of activated carbon are found to be 400 ° C -the carbonization temperature, 4 hours -the carbonization time, 1:1-the ratio of Lapsi Seed Stone particles and Phosphoric acid and 50 %-the percentage of phosphoric acid concentration

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Preparation, characterization and evaluation of adsorptive properties of orange peel based activated carbon via microwave induced K2CO3 activation

Cited by 358 publications

References 24 publications

Preparation of Pinewood- and Wheat Straw-based Activated Carbon via a Microwave-assisted Potassium Hydroxide Treatment and an Analysis of the Effects of the Microwave Activation Conditions

Preparation of Pinewood- and Wheat Straw-based Activated Carbon via a Microwave-assisted Potassium Hydroxide Treatment and an Analysis of the Effects of the Microwave Activation Conditions

Evaluación de la biosorción con bagazo de palma africana para la eliminación de Pb (II) en solución

Characterization of Activated carbons Prepared from a Locally Available Material by Iodine Number

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