Effect of Activation Time on the Pinang Frond based Activated Carbon for Remazol Brilliant Blue R Removal

Ahmad, Mohd Azhar; Herawan, Safarudin Gazali; Yusof, Aizuddin Azlan

doi:10.15282/jmes.7.2014.7.0105

Cited by 18 publications

(14 citation statements)

References 23 publications

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“…With an increase in the activation time from 1.0 to 2.0 h, S BET and V tot advance to a certain degree and then decrease when the activation time is further increased to 2.5 h. The reduction in S BET and V tot is attributable to the seal-off of some portion of pores after a prolonged time. 20 The highest specific surface area obtained is found to be 1383 m 2 g −1 , which was achieved at a ZnCl 2 /CFH ratio of 3:1, an activation temperature of 600 °C, and an activation time of 2.0 h.…”

Section: Physicochemical Characterization Of Acmentioning

confidence: 89%

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Activated carbons from coffee husk: Preparation, characterization, and reactive red 195 adsorption

Thi

Ван

2020

Journal of Chemical Research

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Activated carbons are prepared from coffee husks by chemical activation with ZnCl2 and are characterized by employing Brunauer, Emmett and Teller, scanning electron microscopy, Fourier-transform infrared spectroscopy, and Boehm titrations. The effects of ZnCl2/coffee husks, activation temperature, and activation time are studied, and the results show that the sample ACZ3-600-2 has a high surface area of 1383 m2 g−1, a high pore volume of 1.6482 cm3 g−1, and numerous surface functional groups. The adsorption of reactive red 195 onto the prepared coffee husk activated carbon can be well-described by the pseudo-second-order kinetic model and is found to be controlled by film diffusion followed by intra-particle diffusion. The adsorption isotherm data obtained at 10–40 °C are analyzed and found to follow the Sips model at lower temperatures (10 and 20 °C) and the Redlich–Peterson model at higher temperatures (30 and 40 °C). The obtained thermodynamic parameters (Δ G° < 0, Δ H° = 33.487 kJ mol−1, and Δ S° = 202.30 J K−1 mol−1) suggest that the adsorption of reactive red 195 onto the prepared activated carbon is spontaneous, endothermic, and demonstrates an increasing of randomness at the adsorbate–adsorbent interface. The investigated results show that coffee husk activated carbon is an efficient adsorbent for the removal of reactive red 195 from aqueous solutions.

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Section: Physicochemical Characterization Of Acmentioning

confidence: 89%

“…The RR 195 uptakes of the ACZ3-600-2 sample at four different adsorption temperatures (10,20,30, and 40 °C) are displayed in Figure 13. As can be seen, the adsorbed amounts of RR 195 increase with RR 195 concentration, rather sharply in the region of concentration less than 40 mg L −1 and more smoothly at higher concentration.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Activated carbons from coffee husk: Preparation, characterization, and reactive red 195 adsorption

Thi

Ван

2020

Journal of Chemical Research

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“…The literature contains many examples of self-dual Leonard pairs. For instance (i) the ated with an irreducible module for the Terwilliger algebra of the hypercube (see [4, Corol Leonard pair of Krawtchouk type (see [10, De nition 6.1]); (iii) the Leonard pair associated module for the Terwilliger algebra of a distance-regular graph that has a spin model in th bra (see [1,Theorem], [3,Theorems 4.1, 5.5]); (iv) an appropriately normalized totally bi (see [11,Lemma 14.8]); (v) the Leonard pair consisting of any two of a modular Leonard t De nition 1.4]); (vi) the Leonard pair consisting of a pair of opposite generators for the bra, acting on an evaluation module (see [5,Proposition 9.2]). The example (i) is a specia examples (iii), (iv) are special cases of (v).…”

Section: Introductionmentioning

confidence: 99%

“…Carbon dioxide is a commonly used and an effective activator for the activation techniques of activated carbon (AC), since it is clean, cheap, easy to obtain, and facile to control. A type of microporous AC was prepared from Pinang frond using CO 2 as the activation agent [5]. The specific surface area and the pore volume of the products is 958.23 m 2 /g and 0.5469 mL/g, which has 87.6% adsorption rate of Remazol Brilliant Blue R (RBBR).…”

Section: Introductionmentioning

confidence: 99%

The effect of activation temperature on structure and properties of blue coke-based activated carbon by CO2 activation

Lan

Jiang

Song

et al. 2019

Green Processing and Synthesis

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Blue coke-based activated carbon (BAC) was prepared via CO2 activation with disused blue coke powder as raw materials at high temperature. The factor of activation temperature was intensively studied. The properties of sample were characterized by N2 adsorption-desorption techniques, scanning electron microscopy (SEM) and Fourier transform infrared (FTIR), and the activation mechanism was also proposed. The results showed that, with the increase of temperature, the yield of BAC decreased, while the iodine adsorption increased first and then decreased. The N2 adsorption-desorption isotherms revealed that the BAC had both micropores and mesopores, and the optimal temperature of porosity development was at 900-1000°C. When the activation temperature reached 1000°C, the maximum Brunauer-Emmett-Teller (BET) specific surface area and pore volume of BAC were 636.91 m2·g-1 and 0.3627 cm3·g-1, respectively. The FTIR results indicated that BAC surface contained large amounts of surface functional groups such as hydroxyl, ester, carboxyl, and so on. The content of them decreased with the increase of temperature. Mechanism analysis shows that radial hole-making function happen first then transverd hole-enlarging function as the temperature increases, for the formation of large amount of microporous, the radial activation was the main controlling process.

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“…In order to treat wastewater containing reactive dyes, a trial and error experimental run for the selection of a treatment technique is usually followed. Several treatment processes such as ozonation [3], ultrafiltration [4], photocatalytic degradation [5,6], adsorption [7,8], and coagulation-flocculation [9] have been widely employed to remove dyes from wastewater. It is hard to mention a single process that is capable of adequate treatment, mainly due to the complex nature of the effluent.…”

Section: Introductionmentioning

confidence: 99%

Removal of reactive dye from aqueous solution using coagulation–flocculation coupled with adsorption on papaya leaf

Mukhlish¹,

Khan²,

Islam³

et al. 2016

J. Mech, Eng, Sci.

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Attempts were made to investigate the effectiveness of a combined process of coagulation-flocculation and adsorption for the removal of reactive dye (Reactive Red 3BS) from aqueous solution. The effluent obtained from the coagulation-flocculation process was the raw solution for the second step of the coupling process, i.e. adsorption. The coagulation-flocculation process and the adsorption method were also studied individually. The optimum pH and the optimum dosages of alum and calcium oxide for the coagulation-flocculation process were determined. Aluminium sulphate (alum), calcium oxide and papaya leaf were used as the coagulant, coagulant aid and adsorbent, respectively. Complete dye removal from raw solution having a concentration of 100 mg L -1 could be achieved by using 300 mg L -1 of alum, 80 mg L -1 of calcium oxide and 0.20 g of papaya leaf adsorbent. Adsorption tests showed that papaya leaf could be used as a potential adsorbent for the removal of Reactive Red 3BS from aqueous solution. The maximum sorption capacities of papaya leaf in the case of sorption from pretreated solution and pure solution were 50.23 mg g -1 and 21 mg g -1 , respectively. The combined coagulation-flocculation/adsorption process may be a useful treatment technique for wastewater contaminated with reactive dye.

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Effect of Activation Time on the Pinang Frond based Activated Carbon for Remazol Brilliant Blue R Removal

Cited by 18 publications

References 23 publications

Activated carbons from coffee husk: Preparation, characterization, and reactive red 195 adsorption

Activated carbons from coffee husk: Preparation, characterization, and reactive red 195 adsorption

The effect of activation temperature on structure and properties of blue coke-based activated carbon by CO2 activation

Removal of reactive dye from aqueous solution using coagulation–flocculation coupled with adsorption on papaya leaf

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