scholarly journals Nonlinear Fitting for Estimation of Adsorption Equilibrium, Kinetic and Thermodynamic Parameters of Methylene Blue onto Activated Carbon

2021 ◽  
pp. 67-84
Author(s):  
Ibrahim Yaagoub ERWA ◽  
Omer ISHAG ◽  
Omar ALREFAEİ ◽  
Issa HASSAN
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Thermodynamic Parameters ◽  
Adsorption Equilibrium ◽  
Nonlinear Fitting ◽  
Kinetic And Thermodynamic Parameters

Study of equilibrium, kinetic and thermodynamic parameters about methylene blue adsorption onto natural zeolite

2009 ◽  
Vol 145 (3) ◽  
pp. 496-504 ◽  
Author(s):  
Runping Han ◽  
Jingjing Zhang ◽  
Pan Han ◽  
Yuanfeng Wang ◽  
Zhenhui Zhao ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Thermodynamic Parameters ◽  
Natural Zeolite ◽  
Methylene Blue Adsorption ◽  
Kinetic And Thermodynamic Parameters

scholarly journals PREPARATION AND CHARACTERIZATION OF ACTIVATED CARBON FROM OIL-PALM FIBER AND ITS EVALUATION FOR METHYLENE BLUE ADSORPTION

2021 ◽  
Vol 55 (3) ◽  
Author(s):  
Yuqi Wang ◽  
Jian Pan ◽  
Yanhui Li ◽  
Pengfei Zhang ◽  
Xiaoping Zhang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Oil Palm ◽  
Adsorption Equilibrium ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Palm Fiber ◽  
Langmuir Adsorption ◽  
Langmuir Adsorption Model ◽  
The Impact

A new type of activated carbon was produced from oil-palm fiber using steam activation. Scanning electron microscopy (SEM) was performed on the surface of oil-palm-fiber activated carbon (OPF-AC). The spectra of OPF-AC was investigated with Fourier-transform infrared (FTIR) spectroscopy. The effects of the temperature, adsorbent dose, adsorption time and pH on the adsorption properties of methylene blue on OPF-AC were discussed. The Langmuir adsorption model and Freundlich adsorption model were used to find the adsorption equilibrium isotherm. Adsorption kinetics were employed to explain the adsorption process and predict the adsorption efficiency. The Van’t Hoff equation was used to assess the impact exerted by the adsorption temperature on the adsorbing process. According to the results, the data of the adsorption equilibrium of OPF-AC fit well the Langmuir adsorption model and the kinetics data can be gathered into a pseudo-second-order kinetic model. The adsorption behavior of methylene blue on OPF-AC was endothermic and spontaneous. The total pore volume and BET surface area of OPF-AC reached 0.7809 cm3/g and 1018.84 m2/g, respectively. The maximum adsorption capacity of OPF-AC was 862.07 mg/g at 323 K. Accordingly, the gratifying adsorption of OPF-AC endows it with a promising prospect in the application field of agricultural adsorbents.

Tetracycline adsorption on steam alternative activated carbon: kinetic and thermodynamic parameters

2018 ◽  
Vol 114 ◽  
pp. 307-319 ◽  
Author(s):  
Luz Aracely Soria-Serna ◽  
Jonatan Torres-Pérez ◽  
Simón Yobanny Reyes-López
Keyword(s):  
Activated Carbon ◽  
Thermodynamic Parameters ◽  
Kinetic And Thermodynamic Parameters

Isotherm, Kinetic and Thermodynamic Studies on Adsorption of Bromocresol Purple, Acid Red 66 and Acid Blue 40 Using Activated Carbon

2021 ◽  
Vol 21 (7) ◽  
pp. 4104-4109
Author(s):  
Jong Jib Lee ◽  
Jong Ki Jeon
Keyword(s):  
Activated Carbon ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Physical Adsorption ◽  
Isotherm Models ◽  
Bromocresol Purple ◽  
Kinetic And Thermodynamic Parameters ◽  
Equilibrium Data ◽  
Adsorption Equilibrium Data ◽  
Acid Blue

This study was conducted with a batch reaction to equilibrium isotherm, kinetic and thermodynamic parameters on adsorption of bromocresol purple (BCP), acid red 66 (AR 66) and acid blue 40 (AB 40) from aqueous solution by using activated carbon with nanopores. Freundlich and Temkin isotherm models were used to evaluate the suitability of isotherm for adsorption equilibrium data. The adsorption equilibrium was best fitted by Temkin model. The Freundlich separation factor values indicated that adsorption on the nanoporous activated carbon could effectively treat three dyes. The kinetic analysis of the adsorption process confirmed that it was more consistent with the pseudo second order model. The intraparticle diffusion was rate limiting step. The adsorption process of three dyes were endothermic because they were positive enthalpy values. The free energy values of three dyes decreased with increasing temperature, so that the spontaneity becomes higher with temperature increase. The activation energy value of three dyes were confirmed the physical adsorption.

Removal of methylene blue by adsorption on aluminosilicate waste: equilibrium, kinetic and thermodynamic parameters

2016 ◽  
Vol 74 (10) ◽  
pp. 2437-2445 ◽  
Author(s):  
Carlos Alberto Policiano Almeida ◽  
Tânia Marina Palhano Zanela ◽  
Clodoaldo Machado ◽  
Juan Antônio Altamirano Flores ◽  
Luiz Fernando Scheibe ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Thermodynamic Parameters ◽  
Low Cost ◽  
Order Kinetic ◽  
X Ray ◽  
Isotherm Equation ◽  
First Order ◽  
Kinetic And Thermodynamic Parameters ◽  
Langmuir Isotherm Equation ◽  
Pseudo First Order

An aluminosilicate waste (AW) was investigated as adsorbent for methylene blue (MB) dye. AW was characterized by petrography, X-ray diffractometry, X-ray fluorescence, scanning electron microscopy, thermogravimetry and zeta potential measurements. It was found that AW contains kaolinite, and other minor components such as quartz, muscovite, smectite, siderite, pyrite and organic compounds. The chemical composition of AW is mainly SiO2 (49%) and Al2O3 (23%) and it has negative superficial charge above pH 1.73. Adsorption of MB dye was studied in a batch system under different conditions of initial dye concentration, contact time and temperature. The isothermal data from batch experiments were fitted to Langmuir and Freundlich equations, with a better fit shown by the Langmuir isotherm equation. Also, pseudo-first-order, pseudo-second-order and intraparticle diffusion models were considered to evaluate the rate parameters. The experimental data fitted the pseudo-first-order kinetic model best. Thermodynamic parameters were calculated, showing the adsorption to be an endothermic yet spontaneous process, with the activation energy of +37.8 kJ mol–1. The results indicate that AW adsorbs MB efficiently, and can be employed as a low-cost alternative in wastewater treatment for the removal of cationic dyes.

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