Adsorption of methylene blue from aqueous solutions by activated carbon prepared from hazelnut husk using zinc chloride

Karaçetin, Gülsüm; Sivrikaya, Sezen; İmamoğlu, Mustafa

doi:10.1016/j.jaap.2014.09.006

Cited by 124 publications

(36 citation statements)

References 44 publications

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“…Concentration of methylene blue Exhausted solution obtained at the end of all adsorption studies were measured by a UV-vis spectrophotometer with absorbance at 664.00-664.50 nm. Concentration of methylene blue that remained unabsorbed in the solution was determined and percentage of adsorption and amount of methylene blue adsorbed on per gram of activated carbon were calculated by the following Equations [14] = ( − ).…”

Section: Adsorption Capacity Of Methyl Bluementioning

confidence: 99%

“…This was proportionate with study done by Karacetin et.al. that used activated carbon from Hazelnut Husk [14] and Kumar [17] who used activated carbon from Foxnutshell. The increase in adsorption of MB with the high pH was due to the decrease in electrostatic repulsion between the positively charged methylene blue and the surface of the activated carbon.…”

Section: Methylene Blue Adsorptionmentioning

confidence: 99%

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The potential of activated carbon derived from bio-char waste of bio-oil pyrolysis as adsorbent

2018

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Abstract. Activated carbon from bio-char waste of bio oil pyrolysis of mixed sugarcane bagasse and Rambutan twigs was investigated. Bio-char as by-product of bio-oil pyrolysis has potential to be good adsorbed by activating process. Bio-chars waste was activated in fixed bed reactor inside furnace without presenting oxygen. Gas N2 and CO2 were employed to drive out oxygen from the reactor and as activator, respectively. One of the best activation treatments is achieved by performing activation in different temperature and time to produce standard activated carbon. The experiment was performed at different temperatures and activation time, i.e. 800, 850, and 900 C and 80 and 120 minutes, respectively, to determine the optimal operating condition. Activated carbon was characterized by analysis of moisture content, ash content pH, and methylene blue test. The results showed that optimum activation was at 850C and 80 minute, where activated carbon produced indicated the best adsorption capacity. The ash content and pH had significant role in resulting good activated carbon.

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Section: Adsorption Capacity Of Methyl Bluementioning

confidence: 99%

Section: Methylene Blue Adsorptionmentioning

confidence: 99%

The potential of activated carbon derived from bio-char waste of bio-oil pyrolysis as adsorbent

2018

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“…MB can cause eye burns and permanent injury to the eyes of both humans and animals (mostly aquatic) and is a monoamine oxidase inhibitor (MAOI) that inhibits the activity of the monoamine oxidase enzyme family (Bellir et al 2010). MB dye (C16H18N3SCL) is also accepted as a model compound for adsorption of medium sized organic molecules (Karacetin et al 2014;Aci et al 2008). Although it can be used as a pharmaceutical drug, it can also cause short periods of rapid or difficult breathing, and ingestion causes a burning sensation and sometimes nausea, vomiting, profuse sweating, mental confusion, and methemoglobinemia (Bulut and Aydin 2006).…”

Section: Introductionmentioning

confidence: 99%

Coconut Husk Adsorbent for the Removal of Methylene Blue Dye from Wastewater

Man¹,

Akinbile²,

Jun³

2015

BioResources

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A study to assess the efficiency of coconut husks (CHs) in removing methylene blue (MB) dye from wastewaters in Malaysia was carried out. A fixed bed column adsorber was set up using flow rates of 40 and 80 mL/min, and the adsorbent (CH) was prepared using the base treatment method with NaOH as activating agent. Three different column bed depths (10, 20, and 25 cm) and unit weights of adsorbent (103, 213, and 260 g) were used. Two models, the bed depth service time (BDST) and Thomas models, were used to validate the adsorption capacity results and breakthrough curve. Changing the bed depth from 20 to 25 cm did not result in a significant change in adsorption capacity, therefore a 20-cm bed depth is recommended as the most efficient. Similarly, adsorption capacity increased as flow rates increased from 40 to 80 mL/min, indicating that a flow rate of 80 mL/min yielded optimum efficiency. The two models also provided predictions with good fits of the bed depth effect, the adsorption capacity, and the breakthrough curve of CH for MB removal.

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“…K L and q max can be obtained out of the diagram's slope and the intersection line of the linear diagram of C e /q e versus C e . The reversibility factor which is associated with Langmuir isotherm and applied for evaluation of the viability of adsorption onto the adsorbent is calculated by equation (2) [44].…”

Section: ( )mentioning

confidence: 99%

Facile preparation of porous activated carbon under ultrasonic assistance for the Methylene blue removal from aqueous environment: characterization, isothermal, kinetic and thermodynamic studies

Eslami

Khosravi

Miri

et al. 2020

Mater. Res. Express

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Powdered Peganum Harmala activated carbon (PPAC) was synthesized by a new activation method using ultrasonic waves (with a frequency of 37 KHz for 1 h) after carbonization and application to remove methylene blue (MB) from aqueous solutions. In this experiment, the characteristics of the PPAC were examined through BET, FESEM, and FTIR spectrum. The effects of the initial pH (2-12), the adsorbent's dose (0.5-4 g L −1 ), reaction time (2-80 min), initial concentration of the dye (50-300 mg l −1 ), mixing rate (0-300 rpm), and the solution's temperature (10°C-50°C) in adsorption process were investigated. The results indicated that ultrasonic waves have the significant effect on the carbon activating process. BET analysis indicated that the specific surface area of PPAC before activation was 0.776 m 2 g −1 and had increased to 442.14 m 2 g −1 following activation by ultrasonic waves. FESEM images showed that significant elevation of the porosity level and development of numerous pores in the activated carbon. FTIR analysis indicates that following the activation, -OH groups have been developed onto the PPAC surfaces. The adsorption isotherms and kinetics were well fitted by the Freundlich and pseudo-second order model. Investigation of thermodynamic parameters indicated that adsorption process of MB by PPAC is spontaneous, endothermic, and physical.final concentration of methylene blue (mg l −1 ) C t MB concentrations at time t of reaction (mg l −1 ) k 1 pseudo-first order rate constant (1 min −1 ) k 2 pseudo-second order rate constant (mg (g min) −1 ) K f Freundlich adsorbent capacity (mg g −1 (l mg −1 )

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Adsorption of methylene blue from aqueous solutions by activated carbon prepared from hazelnut husk using zinc chloride

Cited by 124 publications

References 44 publications

The potential of activated carbon derived from bio-char waste of bio-oil pyrolysis as adsorbent

The potential of activated carbon derived from bio-char waste of bio-oil pyrolysis as adsorbent

Coconut Husk Adsorbent for the Removal of Methylene Blue Dye from Wastewater

Facile preparation of porous activated carbon under ultrasonic assistance for the Methylene blue removal from aqueous environment: characterization, isothermal, kinetic and thermodynamic studies

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