scholarly journals Preparation of activated charcoal adsorbent from waste tire

2012 ◽  
Vol 10 (10) ◽  
pp. 80-83 ◽  
Author(s):  
Drona Raj Barai ◽  
Vinay Kumar Jha
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Activated Charcoal ◽  
Activated Carbons ◽  
Freundlich Isotherms ◽  
Waste Tire ◽  
Scientific World ◽  
Langmuir And Freundlich Isotherms ◽  
Pseudo Second Order

Activated carbons were prepared from waste tire in two different routes. Some physical properties of thus prepared activated carbons were measured and the characterization of their phases was done by XRD measurement. The adsorption isotherms of methylene blue were simulated by the Langmuir and Freundlich isotherms. The Langmuir isotherms were found to have better fitting with Qmax values 0.227, 0.255 and 0.256 mmol/g for the activated carbons prepared in air, nitrogen, nitrogen and steam respectively while it was 0.275 mmol/g for activated carbon impregnated with H3 PO4 . The overall reaction was found to be pseudo-second order with the rate constant of 8.314 × 10-4 Lg/(mmolmin). The surface area of the best prepared activated carbon was 334.2 m2 /g. Scientific World, Vol. 10, No. 10, July 2012 p80-83 DOI: http://dx.doi.org/10.3126/sw.v10i10.6868

Ultrasonic Treatment of Activated Carbon Used in Adsorption of Basic Fuchsin

2011 ◽  
Vol 704-705 ◽  
pp. 486-491
Author(s):  
Yi Nan Hao ◽  
Xi Ming Wang ◽  
Li Jun Ding ◽  
Da Yan Ma
Keyword(s):  
Activated Carbon ◽  
Contact Time ◽  
Equilibrium Concentration ◽  
Acid Activation ◽  
Basic Fuchsin ◽  
Freundlich Isotherms ◽  
Langmuir And Freundlich Isotherms ◽  
Different Temperatures ◽  
Endothermic Process ◽  
Pseudo Second Order

Xanthoceras Sorbifolia Bunge hull activated carbon (XSBHAC) developed by phosphoric acid activation for removing basic fuchsin (BF) has been investigated. Experiments were carried out as function of contact time, pH (4-10) and temperature (303,313 and 323K). Adsorption isotherms were modeled with the Langmuir and Freundlich isotherms. The data fitted well with the Langmuir isotherm. The Langmuir monolayer saturation capacities of BF adsorbed onto activated carbon were 351.35, 354.96 and 355.94 mg/g at 303,313, and 323 K, respectively.The kinetic models were also studied .The rates of adsorption were found to conform to the pseudo-second-order kinetics with good correlation.Using the equilibrium concentration contents obtained at different temperatures, various thermodynamic parameters,such as △G,△H and △S, have been calculated. The thermodynamics parameters of system indicated spontaneous and endothermic process. Key words: Xanthoceras sorbifolia bunge hull;biosorption; basic fuchsin

scholarly journals Preparation of Activated Charcoal Adsorbent from Waste Tire

2012 ◽  
Vol 27 ◽  
pp. 19-25 ◽  
Author(s):  
Vinay Kumar Jha ◽  
Kiran Subedi
Keyword(s):  
Methylene Blue ◽  
Rate Constant ◽  
Activated Charcoal ◽  
Langmuir Model ◽  
Water Steam ◽  
Kinetics Of Adsorption ◽  
Waste Tire ◽  
Pseudo Second Order ◽  
Mathematical Equations ◽  
Kinetics Of

Activated charcoal was prepared from waste tire by using pyrolysis technique in three different atmospheres, viz, air, nitrogen and a combined atmosphere of nitrogen and water (steam). Methylene blue was then adsorbed on to these activated charcoals and the kinetics of adsorption was also studied. The adsorption isotherms of methylene blue were simulated by the mathematical equations of Langmuir and Freundlich. The Langmuir isotherms were found to have better fitting than that of Freundlich. The Qmax values obtained from Langmuir model were 0.032, 0.036, and 0.092 mmol/g for the activated charcoals prepared in air, nitrogen and nitrogen and water (steam), respectively. The overall reaction was found to be pseudo-second order with the rate constant of 4.2 × 10-2 L g/(mmolmin). The equilibrium adsorption value obtained from the kinetics data i.e. 0.072 (mmol/g) was found to be comparable with that obtained from Langmuir model.DOI: http://dx.doi.org/10.3126/jncs.v27i1.6437 J. Nepal Chem. Soc., Vol. 27, 2011 19-25Uploaded date: 16 July, 2012

scholarly journals Comparison of novel Ziziphus lotus adsorbent and industrial carbon on methylene blue removal from aqueous solutions

2018 ◽  
Vol 78 (10) ◽  
pp. 2055-2063
Author(s):  
Asmaa Msaad ◽  
Mounir Belbahloul ◽  
Samir El Hajjaji ◽  
Abdeljalil Zouhri
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Low Cost ◽  
Sorption Process ◽  
Second Order ◽  
Order Kinetic ◽  
Industrial Carbon ◽  
Freundlich Isotherms ◽  
Pseudo Second Order

Abstract In this work, the use of a novel low-cost adsorbent derived from Ziziphus lotus (ZL) and industrial carbon (IC) has been successfully applied to the removal of methylene blue (MB) from aqueous solutions. The efficiency of this material was studied through Lagergren pseudo-first-order and pseudo-second-order kinetic models. The process for the novel activated carbon and the IC were best represented by the pseudo-second-order rate model. Langmuir and Freundlich isotherms were used to describe the sorption equilibrium data. The Langmuir model turned out to be the most adequate and maximum capacities were measured to be 833.33 and 142.85 mg.g−1 for ZL activated carbon and IC from Sigma Aldrich, respectively. The thermodynamic study revealed that the sorption process is spontaneous and endothermic for the two adsorbents. To explain the effectiveness of MB removal, ZL activated carbon was characterized by scanning electron microscopy, Brunauer–Emmett–Teller surface area, X-ray diffraction and Fourier transform infrared spectroscopy.

scholarly journals Preparation and characterization of activated carbons from winemaking wastes and their adsorption of methylene blue

2018 ◽  
Vol 36 (5-6) ◽  
pp. 1331-1351 ◽  
Author(s):  
Lorena Alcaraz ◽  
Ana López Fernández ◽  
Irene García-Díaz ◽  
Félix A López
Keyword(s):  
Methylene Blue ◽  
Activated Carbons ◽  
Reaction Times ◽  
Equilibrium Conditions ◽  
Freundlich Model ◽  
Pseudo Second Order ◽  
Temperature Equilibrium ◽  
Microscopy Examination

This work reports the preparation of activated carbons via the hydrothermal treatment at 523 K/30 bar of two common winemaking wastes: bagasse and cluster stalks. The hydrothermal carbons produced by the above treatment were turned into activated carbons via their exposure to KOH and carbonization at 1073 K. These were then subjected to Raman spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy examination, and the determination of their Brunauer–Emmett–Teller surface area. The ability of the activated carbons to adsorb methylene blue in aqueous solution was then examined, determining the influence of time, methylene blue concentration, and temperature. Equilibrium conditions were reached for reaction times between 180 and 240 min at pH 7. The adsorption isotherms were found to better fit the Langmuir than the Freundlich model, and the adsorption kinetics fitted a pseudo-second-order model. The maximum adsorption at 303 K was 714–847 mg g−1. Thermodynamic studies revealed the adsorption of methylene blue to be spontaneous and exothermic. These results show that high-quality activated carbons can be produced from winemaking waste.

scholarly journals Kinetics Study of Methylene Blue Adsorption Onto Activated Carbon by Means of Spectrophotometry

2014 ◽  
Vol 10 (3-4) ◽  
Author(s):  
Dijana Jelić ◽  
Jelena Penavin-Škundrić ◽  
Željka Marjanović-Balaban ◽  
Vesna Antunović ◽  
Nataša Radulj
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Equilibrium Isotherms ◽  
Adsorption Phenomenon ◽  
Isotherm Equation ◽  
Concentration Estimation ◽  
Adsorption Processes ◽  
Endothermic Process ◽  
Pseudo Second Order

Goal of this work is to explore adsorption phenomenon of methylene blue on activated carbon. The adsorption process was monitored at 30 0C and 50 0C. We used spectrophotometric method for concentration estimation and on the basis of obtained results we proposed kinetics mechanism and equilibrium isotherms. Adsorption has been found to be an efficient and economically cheap process to remove pollutants such as colors, dyes and metal impurities. Adsorption processes using activated carbons are widely used to remove pollutants from wastewater. By fitting experimental results, pseudo-second order and Elovichev model gave very satisfactory results with the correlation coefficient R = 0.99994 and R = 0.99973, successively. Equilibrium isotherms of the methylene blue on the activated carbon were determined and correlated with common isotherm equation Freundlich, Langmuir and Temkin model. Rate of adsorption increased with increase in experimental temperature, which goes in favor of endothermic process. Adsorption of methylene blue onto activation carbon is happening probably through chemisorption path.

scholarly journals Preparation and characterization of activated carbons from different kinds of coal

2020 ◽  
pp. 25-31
Author(s):  
Batkhishig Damdin ◽  
Purevsuren Barnasan ◽  
Chung-Jun Lin ◽  
Batbileg Sanjaa ◽  
Ariunaa Alyeksandr
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Iodine Number ◽  
Surface Area ◽  
Pore Volume ◽  
Activated Carbons ◽  
Bet Surface Area ◽  
Water Steam ◽  
Initial Coal

Initial coal was purified in heavy liquid with a density 1.3 cm3 of ZnCl2 solution and purified coal was carbonized and the initial coal samples of each deposits were purified by pyrolysis. Thus, the yield of pyrolysis hard residue in the enriched sample was slightly higher than in the hard residue of initial coal. Therefore, pyrolysis hard residue of purified coal (carbonized sample) was activated at 800°C for 2 hours by preheated water steam. Activated carbons (ACs) and non-activated and non-carbonized coal from Baganuur, Ereen and Nariin Sukhait deposits were technically analyzed and their iodine number, BET surface area, pore volume and adsorption of methylene blue (MB) were determined. When these results were compared, these indicators increased 5-17 times in the Baganuur activated carbon (BN-AC), Ereen activated carbon (E-AC) and Nariin Sukhait activated carbon (NS-AC) as compared to inactivated coal.

Adsorption of methylene blue from aqueous solution onto activated carbons developed from eucalyptus bark and Crataegus oxyacantha core

2016 ◽  
Vol 74 (9) ◽  
pp. 2021-2035 ◽  
Author(s):  
Mohammad Ali Zazouli ◽  
Ali Azari ◽  
Samaneh Dehghan ◽  
Razieh Salmani Malekkolae
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Second Order ◽  
Point Of Zero Charge ◽  
Polluted Water ◽  
Order Kinetic ◽  
Pseudo Second Order ◽  
Eucalyptus Bark

In this study, eucalyptus bark and Crataegus oxyacantha core-based activated carbon were synthesized and their morphological features characterized by scanning electron microscopy and Fourier transform infrared spectroscopy techniques. The efficiency of synthesized adsorbents in removal of methylene blue (MB) from aqueous solution was investigated in a series of batch experiments. Furthermore, the influences of various experimental factors involving the contact time, the initial dye concentration, the adsorbent dosage, and the pH of the dye solution were investigated. The point of zero charge (pHpzc) of the applied adsorbents was also determined. In addition, the experimental data were expressed by Langmuir, Freundlich and Tempkin isotherms and pseudo-first order and pseudo-second order kinetic models. Adsorption equilibrium of the two adsorbents was reached within 1 h for MB concentrations of 20 to 100 mg/L. The equilibrium data obtained at optimum conditions of MB sorption by eucalyptus bark activated carbon and Crataegus oxyacantha core activated carbon were best fitted to Tempkin and Langmuir isotherm models, respectively. Besides, it was revealed that the adsorption rate follows a pseudo-second order kinetic model. From the findings of this study, it can be postulated that these adsorbents could be of great potential as a new class of adsorbents for organic dye removal from polluted water.

Adsorption Dynamics of Agricultural Waste Activated Carbon in Water Quality Improvement

2021 ◽  
Vol 6 (7) ◽  
pp. 11-19
Author(s):  
Igbemi Arthur Igbemi ◽  
Ify L. Nwaogazie ◽  
Onyewuchi Akaranta ◽  
G. O. Abu
Keyword(s):  
Activated Carbon ◽  
Metal Ions ◽  
Contact Time ◽  
Activated Carbons ◽  
Coconut Shell ◽  
Initial Concentration ◽  
Freundlich Isotherms ◽  
Lead And Cadmium ◽  
Pseudo Second Order ◽  
Adsorbent Dose

This study investigated the removal of Lead and Cadmium ions from aqueous solution using activated carbons from agricultural wastes. Activated carbons prepared by chemical activation using Phosphoric acid were characterized by Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis. The influence of contact time, initial concentration and adsorbent dose which governed the efficiency of the process was ascertained through batch adsorption studies. Adsorption isotherms were determined by correlating with Langmuir and Freundlich isotherms and the kinetic studies were correlated with pseudo first order and pseudo second order equations. The results showed that the amount of Lead and Cadmium adsorbed decreased as the adsorbent dose increased while the adsorption capacity increased with increased in contact time and initial concentration. Activated carbons prepared from Coconut shell and palm kernel (shell and cake) competed favorably with the commercial activated carbon in percentage removal of the metal ions as all the activated carbons had over 90 % removal within 60 minutes when 1g of adsorbent was used. The equilibrium data fitted best into Freundlich isotherms for both metal ions. The rate of adsorption could be described by pseudo second order for all the adsorbents except Coconut shell activated carbon in the adsorption of Lead while intra-particle diffusion was the limiting step for Cadmium adsorption. Therefore, the agricultural by-products can be used as effective, low-cost, and environmentally friendly adsorbents for domestic water treatment in many parts of the world.

scholarly journals Comparative studies on the removal of copper (II) by Ulva fasciata activated carbon and commercially activated carbon

2012 ◽  
Vol 14 (4) ◽  
pp. 88-94 ◽  
Author(s):  
R.P. Suresh Jeyakumar ◽  
V. Chandrasekaran
Keyword(s):  
Activated Carbon ◽  
Activated Carbons ◽  
Synthetic Wastewater ◽  
Batch Adsorption ◽  
First Order ◽  
Ulva Fasciata ◽  
Adsorption Data ◽  
Pseudo Second Order ◽  
Pseudo First Order ◽  
Adsorbent Dose

Abstract In this work, the efficiency of Ulva fasciata sp. activated carbons (CCUC, SCUC and SSUC) and commercially activated carbon (CAC) were studied for the removal of Cu (II) ions from synthetic wastewater. Batch adsorption experiments were carried out as a function of pH, contact time, initial copper concentration and adsorbent dose. The percentage adsorption of copper by CCUC, SSUC, SCUC and CAC are 88.47%, 97.53%, 95.78% and 77.42% respectively. Adsorption data were fitted with the Langmuir, Freundlich and Temkin models. Two kinetic models pseudo first order and the pseudo second order were selected to interpret the adsorption data.

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