scholarly journals Comparison of methylene blue adsorption from aqueous solution using spent tea dust and raw coir pith

2013 ◽  
Vol 16 (1) ◽  
pp. 146-159 ◽  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Rate Constant ◽  
Low Cost ◽  
Order Rate Constant ◽  
Solution Ph ◽  
Coir Pith ◽  
Adsorption Capacities ◽  
Pseudo Second Order ◽  
Diffusion Rate Constant

<div> <p>The purpose of the present work is to test the possibility of using the spent tea dust and raw coir pith for the removal of methylene blue (MB) from aqueous solution. The effects of the contact time, adsorbent dosage and solution pH were studied in batch experiments at 27 &deg;C. Results showed that a pH of 7 is favourable for the adsorption of dye. The isothermal data could be well described by the Langmuir equations. Kinetic parameters of adsorption such as the Langergen pseudo-first-order, pseudo-second-order rate constant and the intraparticle diffusion rate constant were determined. The adsorption capacities of Spent Tea Dust (STD) and Raw Coir Pith (RCP) were found to be 86.21 mg and 142.86 mg g<sup>-1</sup> of the adsorbent respectively. The results indicate that STD and RCP could be employed as low-cost alternatives to commercial activated carbon for the removal of dyes from aqueous solution.</p> </div> <p>&nbsp;</p>

Lotus seedpod as a low-cost biomass for potential methylene blue adsorption

2016 ◽  
Vol 74 (11) ◽  
pp. 2560-2568 ◽  
Author(s):  
Qiulai He ◽  
Hongyu Wang ◽  
Jing Zhang ◽  
Zhuocheng Zou ◽  
Jun Zhou ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Solution Ph ◽  
Monolayer Adsorption ◽  
Pseudo Second Order ◽  
Central Composite ◽  
Lotus Seedpod

The adsorption of methylene blue (MB) by low cost biomass lotus seedpod (LSP) was optimized by a central composite design combined with response surface methodology in aqueous solution. Solution pH, initial dye concentration and adsorbent dosage were studied as independent variables at five levels each, respectively. Analysis of variance suggested the validity of the regression model. LSP was characterized by Fourier transform infrared spectra and energy dispersive spectroscopy. The kinetics revealed that the adsorption behavior followed the pseudo-second-order model. Langmuir and Freundlich isotherm models were used to evaluate the adsorption, and the experimental data were better fitted by the Langmuir isotherm than the Freundlich isotherm. The maximum monolayer adsorption capacity of the LSP was 157.98 mg g−1 at 30 °C for MB adsorption. In addition, 0.2 M HCl solution could be used for reusability of LSP via desorption tests. LSP was proven to be an available and effective biosorbent for MB removal from aqueous solution.

scholarly journals The Equilibrium, Kinetics, and Thermodynamics Studies of the Sorption of Methylene Blue from Aqueous Solution Using Pulverized Raw Macadamia Nut Shells

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Joshua N. Edokpayi ◽  
Samson O. Alayande ◽  
Ahmed Adetoro ◽  
John O. Odiyo
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Surface Area ◽  
Low Cost ◽  
Aqueous Media ◽  
Group Analysis ◽  
Second Order ◽  
Isotherm Models ◽  
Macadamia Nut ◽  
Pseudo Second Order

In this study, the potential for pulverized raw macadamia nut shell (MNS) for the sequestration of methylene blue from aqueous media was assessed. The sorbent was characterized using scanning electron microscopy for surface morphology, functional group analysis was performed with a Fourier-transform infrared spectrometer (FT-IR), and Brunauer–Emmett–Teller (BET) isotherm was used for surface area elucidation. The effects of contact time, sorbent dosage, particle size, pH, and change in a solution matrix were studied. Equilibrium data were fitted using Temkin, Langmuir, and Freundlich adsorption isotherm models. The sorption kinetics was studied using the Lagergren pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion models. The feasibility of the study was established from the thermodynamic studies. A surface area of 2.763 m2/g was obtained. The equilibrium and kinetics of sorption was best described by the Langmuir and the pseudo-second-order models, respectively. The sorption process was spontaneous (−ΔG0=28.72−31.77 kJ/mol) and endothermic in nature (ΔH0=17.45 kJ/mol). The positive value of ΔS0 (0.15 kJ/molK) implies increased randomness of the sorbate molecules at the surface of the sorbent. This study presents sustainable management of wastewater using MNS as a potential low-cost sorbent for dye decontamination from aqueous solution.

scholarly journals Treatment of effluent from fertilizer industry by adsorption on willow sawdust-removal of Ni(II) and Cd(II) from the effluent

2021 ◽  
pp. 1-12
Author(s):  
Raafia Najam ◽  
Syed Muzaffar Ali Andrabi
Keyword(s):  
Aqueous Solution ◽  
Adsorption Process ◽  
Low Cost ◽  
Second Order ◽  
Maximum Adsorption Capacity ◽  
Solution Ph ◽  
The World ◽  
Pseudo Second Order ◽  
Almost All ◽  
Willow Tree

Sawdust of willow has been investigated as an adsorbent for the removal of Ni(II), and Cd(II) ions from aqueous solution. Since willow tree is widely grown in almost all parts of Kashmir, it can be a common most easily available, sustainable, low cost adsorbent for the treatment of wastewaters in this part of the world where growing industrialization is affecting water quality like elsewhere in the world. Therefore, it is worthwhile to investigate the potential of sawdust of willow tree as an adsorbent for the removal of Ni(II) and Cd(II) ions from aqueous solution as a first step. Batch experiments were conducted to study the effect of some parameters such as contact time, initial concentration of metal ions, solution pH and temperature. Langmuir and Freundlich models were employed for the mechanistic analysis of experimental data obtained. Results reveal that in our system adsorption follows the Langmuir isotherm. The maximum adsorption capacity of Ni(II) and Cd(II) were found to be 7.98 and 7.11 mg/g respectively at optimum conditions. The pseudo-first-order and pseudo-second-order models were employed for kinetic analysis of adsorption process. The adsorption process follows pseudo-second-order kinetics. The efficacy of the adsorbent in the treatment of effluent from fertilizer factory has been investigated and the results have been found encouraging.

scholarly journals Coriandrum Sativum seeds as a green low-cost biosorbent for methylene blue dye removal from aqueous solution: spectroscopic, kinetic and thermodynamic studies

2018 ◽  
Vol 7 (3) ◽  
pp. 204-216
Author(s):  
Lamya Kadiri ◽  
Abdelkarim Ouass ◽  
Youness Essaadaoui ◽  
El Housseine Rifi ◽  
Ahmed Lebkiri
Keyword(s):  
Methylene Blue ◽  
Low Cost ◽  
Coriandrum Sativum ◽  
Blue Dye ◽  
Solution Ph ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Adsorption Rates ◽  
Efficient Power

Coriandrum sativum seeds (CSS) were investigated as a new eco-friendly and economic biosorbent for the removal of methylene blue (MB) dye from synthetic solutions. First, the spectroscopic analyses were effectuated using FTIR and SEM to confirm the possibility of CSS to remove MB dye from aqueous solutions. The study of the influence of different parameters, such as contact time, CSS mass, solution pH, MB concentration, and temperature was realized and proved the rapid and efficient power adopted by CSS as a removal of the studied dye. Also, the regeneration study was effectuated for four cycles with excellent adsorption rates. The modeling studies revealed that the studied process obeys the pseudo-second-order model and Langmuir isotherm model. The adsorption amount was found to be 107.53 mg/g. Finally, the determination of thermodynamic parameters indicated the exothermic and spontaneous type of the removal process of MB onto CSS.

Study of the kinetics and the adsorption isotherm of cadmium(II) from aqueous solution using green algae (Ulva lactuca) biomass

2015 ◽  
Vol 72 (9) ◽  
pp. 1505-1515 ◽  
Author(s):  
H. Asnaoui ◽  
A. Laaziri ◽  
M. Khalis
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Second Order ◽  
Ulva Lactuca ◽  
Order Kinetic ◽  
Solution Ph ◽  
Algae Biomass ◽  
Pseudo Second Order

Batch experiments were conducted to study the adsorption of hazardous cadmium onto low-cost algae biomass in aqueous solution with respect to concentration of adsorbate, adsorbent dosage, contact time, solution pH and temperature. Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms and the isotherm constants were determined. The activation energy of adsorption was also evaluated for the adsorption of cadmium onto Ulva lactuca biomass. Experimental data were tested in terms of biosorption kinetics using pseudo-first-order and pseudo-second-order kinetic models. The results showed that the biosorption processes of Cd(II) followed well pseudo-second-order kinetics. Langmuir and Freundlich models were applied to describe the biosorption isotherm of the metal ions by Ulva lactuca biomass. Langmuir model fitted the equilibrium data better than the Freundlich isotherm. The biosorption capacity of Ulva lactuca biomass for cadmium was found to be 3.02 mg/g at pH 5.60 min equilibrium time and 20 °C. The mean free energy which was calculated was 6.24 kJ/mol for Cd(II) biosorption, which shows that the adsorption is physical. The calculated thermodynamic parameters (ΔG0, ΔH0 and ΔS0) showed that the biosorption of Cd(II) onto Ulva lactuca biomass was feasible, spontaneous and exothermic under examined conditions. The results indicate that algae Ulva lactuca could be employed as a low-cost material for the removal of metal ions from aqueous solution.

scholarly journals Dye removal from aqueous solution by raw maize corncob and H3PO4 activated maize corncob

2017 ◽  
Vol 8 (2) ◽  
pp. 214-224 ◽  
Author(s):  
M. Farnane ◽  
H. Tounsadi ◽  
A. Machrouhi ◽  
A. Elhalil ◽  
F. Z. Mahjoubi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Order Kinetic ◽  
Solution Ph ◽  
Adsorption Performance ◽  
Adsorption Capacities ◽  
Monolayer Adsorption ◽  
Equilibrium Data ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Best Fit

AbstractThe focus of this study is the investigation of removal ability of methylene blue (MB) and malachite green (MG) dyes from aqueous solution by raw maize corncob (RMC) and H3PO4 activated maize corncob (AMC). Maize corncobs were carbonized at 500 °C for 2 h, and then impregnated at a phosphoric acid to maize corncob ratio of 2.5 g/g. The impregnated maize corncob was activated in a tubular vertical furnace at 450 °C for 2 h. Samples were characterized by different methods. Adsorption experiments were carried out as a function of solution pH, adsorbent dosage, contact time, initial concentration of dyes and the temperature. Experimental results show that the activation of maize corncob boosts four times the adsorption performance for the selected dyes. The adsorption process is very rapid and was pH dependent with high adsorption capacities in the basic range. The kinetic data were fitted with the pseudo-second-order kinetic model. The best fit of equilibrium data was obtained by the Langmuir model with maximum monolayer adsorption capacities of 75.27 and 271.19 mg/g for MB, 76.42 and 313.63 mg/g for MG, respectively, in the case of RMC and AMC. The temperature did not have much influence on the adsorption performance.

Kinetic and Equilibrium of Biosorption of Methylene Blue by Sunflower Straw

2012 ◽  
Vol 610-613 ◽  
pp. 194-197
Author(s):  
Li Ping Chen ◽  
Si Qin Dalai
Keyword(s):  
Methylene Blue ◽  
Ph Value ◽  
Low Cost ◽  
Order Equation ◽  
Solution Ph ◽  
Biosorption Process ◽  
Optimum Ph ◽  
Pseudo Second Order ◽  
Batch Biosorption ◽  
Sunflower Straw

With sunflower straw as low-cost biosorbent, the biosorption of methylene blue (MB) from aqueous solution was studied by batch biosorption technique. The biosorption experiments were carried out under different conditions of solution pH, sunflower straw dose, and temperature. The results showed that biosorption of MB on to sunflower straw affected remarkably by the pH value, and the maximum biosorption amount was achieved at an optimum pH of 12.0; the equilibrium biosorption amount decreased as temperature was increasing, and the biosorption process might be depicted primly by Langmuir function; It was shown that the biosorption of methylene blue could be described by the pseudo-second-order equation.

scholarly journals Biosorption Removal of Methylene Blue Dye from Aqueous Solutions using Phosphoric Acid-Treated Balanites Aegyptiaca Seed Husks Powder

2021 ◽  
Vol 12 (6) ◽  
pp. 7845-7862
Keyword(s):  
Methylene Blue ◽  
Phosphoric Acid ◽  
Low Cost ◽  
Solution Temperature ◽  
Blue Dye ◽  
Solution Ph ◽  
Balanites Aegyptiaca ◽  
Batch Mode ◽  
Pseudo Second Order ◽  
Adsorption Kinetics And Isotherm

Water contamination caused by the presence of synthetic dye is one of the world's major environmental concerns. This work aims to explore the potential application of non-carbonized phosphoric acid-treated Balanites aegyptiaca "heglig" seed husks powder (BASHP) as a bio-sorbent for methylene blue (MB) removal from water bodies. BASHP was characterized using Fourier transform infrared spectroscopy (FTIR). The characteristics of BASHP, such as the iodine number, point of zero charges, solubility, and specific surface area (SMB) were also estimated. The biosorption of MB onto the BASHP surface was studied in batch mode under various conditions (contact time, shaking speed, solution temperature, initial solution pH, ionic strength, initial dye concentration, and biosorbent dosage). The adsorption kinetics and isotherm were better described by pseudo-second-order and Langmuir models, respectively. More than 97% of MB was removed, and the maximum biosorbed amount of MB (qmax) was 72.99 mg/g. Thermodynamics findings revealed that the proposed biosorption is an endothermic and spontaneous process. These findings showed that BASHP is a potentially eco-friendly, easily available, and low-cost material for removing hazardous dyes (e.g., methylene blue) from an aquatic environment, as well as a promising method for reducing agricultural solid waste (e.g., seed husks).

scholarly journals Cationic Dye Removal By Sugarcane Bagasse Activated Carbon From Aqueous Solution

2015 ◽  
Vol 17 (4) ◽  
pp. 784-795 ◽  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Sugarcane Bagasse ◽  
Dye Removal ◽  
Adsorption Process ◽  
Low Cost ◽  
Second Order ◽  
Cationic Dye ◽  
Pseudo Second Order

<div> <p>Low cost agricultural waste adsorbents can be viable alternatives to activated carbon for the treatment of contaminated wastewater. Sugarcane Bagasse, an abundant agriculture waste in Egypt, was used in the present study to prepare activated carbon. Batch adsorption experiments were conducted to study its effectiveness to remove cationic dye methylene blue from aqueous solution. The effects of initial dye concentrations, agitation time, solution pH and temperature on methylene blue dye removal were investigated. The optimum pH value for the maximum percentage removal of the dye was 7. Adsorption isotherms were determined and modeled with Redlich&ndash;Peterson, Langmuir and Freundlich equations at 20&ordm;C.The kinetic data were analyzed using Pseudo-first order, pseudo-second order. The mechanism of the adsorption process was determined from the intraparticle diffusion model. Thermodynamic parameters such as standard enthalpy (ΔH&deg;), standard entropy (ΔS&deg;) and free energy (ΔG&deg;) were determined.&nbsp; The equilibrium data were best fitted to the Redlich&ndash;Peterson isotherm model .The adsorption kinetics was found to follow the pseudo-second-order kinetic model with good correlation coefficient. The positive ΔH<sup>◦</sup> value indicated that the adsorption process was endothermic in nature. The results revealed sugarcane bagasse activated carboncould be employed as a low-cost alternative adsorbent in wastewater treatment.&nbsp;</p> </div> <p>&nbsp;</p>

Adsorptive Removal of Methylene Blue by Ginkgo Leaf Powder

2011 ◽  
Vol 130-134 ◽  
pp. 829-832
Author(s):  
Jin Xia Mu ◽  
Ming Juan Shi ◽  
Xiao Ying Wu ◽  
Jin Ye Li
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Low Cost ◽  
Sorption Kinetics ◽  
Second Order ◽  
Order Kinetic ◽  
Freundlich Isotherms ◽  
Leaf Powder ◽  
Pseudo Second Order ◽  
Ginkgo Leaf

The adsorption of methylene blue (MB) from aqueous solution using a low-cost adsorbent, ginkgo leaf powder, has been studied. The equilibrium data were fitted to Langmuir and Freundlich isotherms and the equilibrium adsorption was best described by the Langmuir isotherm model with maximum monolayer adsorption capacities found to be 39 mg/g. The sorption was analyzed using pseudo-first-order and pseudo-second order kinetic models, and the sorption kinetics was found to follow a pseudo-second order kinetic model. Ginkgo leaf appears as a prospective adsorbent for the removal of methylene blue from aqueous solution.

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