scholarly journals Adsorptive removal of methylene blue dye from soapnut shell & pineapple waste derived activated carbon

2021 ◽  
Vol 13 (1) ◽  
pp. 81-87
Author(s):  
Ratnesh Kumar Patel ◽  
Ram Prasad ◽  
Ravi Shankar ◽  
Prateek Khare ◽  
Maharshi Yadav
Keyword(s):  
Methylene Blue ◽  
Experimental Studies ◽  
Optimal Dose ◽  
Blue Dye ◽  
Batch Mode ◽  
Initial Concentration ◽  
Pineapple Waste ◽  
Major Parameter ◽  
Equilibrium Data ◽  
Adsorbent Dose

The methylene blue (MB) adsorption from the aqueous solution on activated charcoal from soapnut shell & pineapple waste were studied in batch mode. The influence of a major parameter determining the efficiency of the process, such as the initial concentration, the adsorbent dose and the contact time on the removal process, was studied. Experimental studies have shown that the adsorption capacity of methylene blue increases with the increase of the adsorbent dose and decreases with the increase of the initial concentration. The equilibrium time of 120 min was observed. The considered optimal dose for removing methylene blue from aqueous solutions from soapnut shell & pineapple waste were 0.6 g & 1g respectively. The equilibrium data corresponds precisely to the Langmuir isotherm.  

Kinetics and Isotherms Studies of methylene blue Basic Dye from Aqueous Solution onto Selenicereus grandiflorus Activated Carbon

2019 ◽  
Vol 4 (1-2) ◽  
pp. 1-6
Author(s):  
M. Mahadeva Swamy ◽  
B.M. Nagabhushana ◽  
Nagaraju Kottam
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Point Of Zero Charge ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Batch Mode ◽  
Adsorption Studies ◽  
Kinetics And Isotherms ◽  
Adsorbent Dose

The present experiment explains the effectiveness of adsorption studies of methylene blue dye from aqueous solutions on activated carbon from Selenicereus grandiflorus (SG) treated with conc. sulfuric acid. The sulphuric acid-treated Selenicereus grandiflorus activated carbon (SGAC) was used as low-cost adsorbent for the removal of methylene blue dye from aqueous solution. It suggests an ideal alternative method to adsorption of dye compared to other expensive treatment options. The adsorption studies have been conducted at different experimental parameters, i.e., pH, contact time, adsorbent dose and initial dye concentration. The batch mode experiments were conducted by different adsorbent dose (0.03-0.150 g per 50 mL), pH of the solution (2-12), effect of time (3-18 min), initial dye concentration (10 mg/L), point of zero charge and regeneration of spent adsorbent studies. Langmuir model shows better fit to the equilibrium data (R2 = 0.966) than Freundlich model. The adsorption capacity (Qm) of SGAC increases with increasing dosage where Qm is 16.17 mg g-1.

scholarly journals The Adsorption Efficiency of Chemically Prepared Activated Carbon from Cola Nut Shells by on Methylene Blue

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Julius Ndi Nsami ◽  
Joseph Ketcha Mbadcam
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Experimental Studies ◽  
Isotherm Models ◽  
Solution Ph ◽  
Batch Mode ◽  
Initial Concentration ◽  
Adsorption Isotherm Models ◽  
Pseudo Second Order ◽  
Blue Solution

The adsorption of methylene blue from aqueous solution onto activated carbon prepared from cola nut shell has been investigated under batch mode. The influence of major parameters governing the efficiency of the process such as, solution pH, sorbent dose, initial concentration, and contact time on the removal process was investigated. The time-dependent experimental studies showed that the adsorption quantity of methylene blue increases with initial concentration and decreasing adsorbent dosage. The equilibrium time of 180 min was observed and maximum adsorption was favoured at pH 3.5. The dye removal using 0.1 g of adsorbent was more than 90%. This dosage (0.1 g) was considered as the optimum dosage to remove methylene blue from aqueous solutions. The equilibrium adsorption data were analyzed by the Freundlich, Langmuir adsorption isotherm models. The kinetics of methylene blue solution was discussed by pseudo-first-order, pseudo-second-order, and Elovich models. The adsorption process follows the Elovich rate kinetic model, having a correlation coefficient in the range between 0.9811 and 1.

Kinetic and Thermodynamic Study of Adsorption Methylene Blue by Nitrated Biomass of Prunus Cerasus

2021 ◽  
pp. 242-246
Author(s):  
A. A. Kale
Keyword(s):  
Methylene Blue ◽  
Sorption Process ◽  
Prunus Cerasus ◽  
Isotherm Models ◽  
Blue Dye ◽  
Batch Mode ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
Maximum Removal ◽  
Good Agreement

Adsorption of methylene blue biomass of Prunus cerasus is conducted in batch mode. The effect of various factors such as contact time, adsorbent dosage, initial dye concentration, temperature and pH of dye solution was investigated. The maximum removal of methylene blue dye was attained at 8.0 pH. The adsorption equilibrium was represented with Langmuir, Freundlich and Temkin isotherm models. Langmuir and Tempkin equations were found to have the correlation coefficient value in good agreement. Adsorption of MB onto prunus cerasus followed pseudo second order kinetics. The calculated values of ∆H°, ∆S° and ∆G° were found to be -31.177kJ/mol, 0.1099 KJ/mol and -63.9722 KJ/mol, respectively. The equilibrium data were also fitted to the Freundlich equation. It was observed that the sorption process is spontaneous and exothermic in nature.

scholarly journals Orthophosphoric Acid Activated Babul Seed Carbon as an Adsorbent for the Removal of Methylene Blue

2008 ◽  
Vol 5 (4) ◽  
pp. 742-753 ◽  
Author(s):  
M. Sujatha ◽  
A. Geetha ◽  
P. Sivakumar ◽  
P. N. Palanisamy
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Adsorption Kinetics ◽  
Orthophosphoric Acid ◽  
Chemical Activation ◽  
Bet Surface Area ◽  
Isotherm Models ◽  
Blue Dye ◽  
Equilibrium Data ◽  
Pseudo Second Order

An Experimental and theoretical study has been conducted on the adsorption of methylene blue dye using activated carbon prepared from babul seed by chemical activation with orthophosphoric acid. BET surface area of the activated carbon was determined as 1060 m2/g. Adsorption kinetics, equilibrium and thermodynamics were investigated as a function of initial dye concentration, temperature and pH. First order Lagergren, pseudo-second order and Elovich kinetic models were used to test the adsorption kinetics. Results were analyzed by the Langmuir, Freundlich and Temkin isotherm models. Based on regression coefficient, the equilibrium data found fitted well to the Langmuir equilibrium model than other models. The characteristics of the prepared activated carbon were found comparable to the commercial activated carbon. It is found that the babul seed activated carbon is very effective for the removal of colouring matter.

Purification of Methylene Blue via Photocatalytic Nanofibrous Membranes Containing TiO2 Nanoparticles

2016 ◽  
Vol 11 (4) ◽  
pp. 155892501601100
Author(s):  
Ali Sajjadi ◽  
Seyed Abdolkarim Hosseini Ravandi ◽  
Hossein Izadan ◽  
Nastaran Kadivar
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Titanium Dioxide Nanoparticles ◽  
Cross Flow ◽  
Filtration Efficiency ◽  
Blue Dye ◽  
Carbon Substrate ◽  
Initial Concentration ◽  
The Cross ◽  
Uv Rays

In this paper, titanium dioxide nanoparticles were synthesized on polyacrylonitrile nanofiber membranes via a sol-gel process. Filter structure consisted of a non-woven polyurethane-carbon substrate, polyacrylonitrile nanofiber and titanium dioxide nanoparticles. The concentration of methylene blue dye solution was measured via UV radiation. The filtration efficiency was calculated via Langmuir-Hinshelwood pseudo-first order equations. The results showed that the filtration efficiency of samples using titanium dioxide under UV rays was higher than those without titanium dioxide and UV rays in both immersing and cross-flow processes. Degradation efficiency of the cross-flow system was three times higher than that of immersing method. In the cross-flow process, the effect of three variables-pressure on the membrane, initial concentration of dye solution and pH of the dye solution was studied under UV rays. The highest efficiency obtained was 90.3% by using 1.5 bar pressure, 40 μM initial concentration and pH of 4.1.

scholarly journals Valorization of human hair as methylene blue dye adsorbents

2018 ◽  
Vol 7 (4) ◽  
pp. 344-352 ◽  
Author(s):  
Muhammad Abbas Ahmad Zaini ◽  
Raidah Md. Sudi
Keyword(s):  
Methylene Blue ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Human Hair ◽  
Potassium Hydroxide ◽  
Blue Dye ◽  
Cooperative Adsorption ◽  
Equilibrium And Kinetics ◽  
Equilibrium Data

AbstractThe present study was aimed at evaluating the performance of human hair as adsorbents for methylene blue (MB) dye removal. Human hair was treated using 0.1mpotassium hydroxide (KOH) and 0.1mnitric acid, and the adsorbents were characterized for specific surface area and surface chemistry. The basic-treated human hair adsorbent (BH) exhibits a specific surface area of 3.51 m2/g, which is relatively higher than the acid-treated (AH) and untreated (UH) counterparts. The equilibrium data of all adsorbents obeyed the S-shaped isotherm, suggesting a cooperative adsorption. The BH displays a maximum capacity of 13.5 mg/g, while a comparable capacity of 3.4 mg/g was recorded by AH and UH. The adsorption of MB by BH increased with increasing pH. Based on the equilibrium and kinetics data, the adsorption of MB onto BH is proposed to have the following mechanisms: (i) external diffusion, (ii) intraparticle diffusion, and (iii) cooperative adsorption. In addition, the MB adsorption at a concentration of 20 mg/l is endothermic and spontaneous with temperature increasing from 35°C to 55°C. A basic treatment of human hair using KOH yields a promising adsorbent for dye in wastewater treatment.

scholarly journals Sulfuric Activated Carbon of Black Cumin (Nigella sativa L.) Seeds for the Removal of Cadmium(II) and Methylene Blue Dye

2020 ◽  
Vol 32 (6) ◽  
pp. 1361-1369
Author(s):  
Patience Mapule Thabede ◽  
Ntaote David Shooto ◽  
Thokozani Xaba ◽  
Eliazer Bobby Naidoo
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Nigella Sativa ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Black Cumin ◽  
First Order ◽  
Adsorption Processes ◽  
Equilibrium Data ◽  
Pseudo First Order

Carbon from black cumin seeds was modified with 10 and 20% sulfuric acid to obtain the activated adsorbents. Pristine carbon from black cumin seeds, 10 and 20% H2SO4 activated carbon from black cumin seeds were labelled CBC, ACBC-10 and ACBC-20, respectively. The adsorbents were characterized by SEM, XRD, FTIR, TGA and BET. The adsorbents maximum trend for Cd(II) was ACBC-10 > ACBC-20 > CBC. The maximum capacity trend for methylene blue dye was ACBC-20 > ACBC-10 > CBC. The kinetic model best fitted pseudo second order for Cd(II) which gave r2 values of 0.991-0.998. The methylene blue fitted pseudo first order model with r2 values ranging from 0.993-0.997. Pseudo first order suggested that the adsorption mechanism for methylene blue onto adsorbents involved van der Waal forces of attraction. The equilibrium data fitted Langmuir isotherm model for CBC, ACBC-10 and ACBC-20 with r2 of 0.994 to 0.998 for the removal of methylene blue whilst the removal of Cd(II) followed Freundlich with r2 ranging from 0.992 to 0.997. This suggested that the different adsorption processes were involved between the adsorbate and the adsorbents. Gibb′s free energy (ΔGº) for Cd(II) and methylene blue onto CBC, ACBC-10 and ACBC-20 suggested that the reaction was spontaneous. The adsorption of Cd(II) and methylene blue was endothermic, positive values (ΔHº). This suggested that the enthalpy (ΔHº) had a weak interactive force process whose low energy is associated with electrostatic attraction.

Study on Absorption Experiment of Methylene Blue by Nitrifying Peat

2012 ◽  
Vol 209-211 ◽  
pp. 1969-1972
Author(s):  
Jie Deng ◽  
Ai He Wang ◽  
Chun Zhang
Keyword(s):  
Methylene Blue ◽  
Adsorption Properties ◽  
Langmuir Model ◽  
Hunan Province ◽  
Initial Concentration ◽  
Adsorbent Dosage ◽  
Freundlich Isotherms ◽  
Absorption Experiment ◽  
Equilibrium Data ◽  
Adsorption Amount

A modified peat was prepared by using nitrate and natural peat from Yiyang city in Hunan Province. The adsorption properties of the nitrifying peat for Methylene blue was investigated in aqueous solution. The effect of the adsorbent dosage, time and the initial concentration of methylene blue on the adsorption capability was discussed. The result showed that time and the adsorbent dosage had greater influence on the adsorption of Methylene blue, the adsorption of Methylene blue by Nitrifying peat was a rapid process, and in 20 min in the adsorption rate reached more and 60%, the adsorption amount was approximately proportional to the initial concentration( 20-100 mg /L). Langmuir and Freundlich isotherms were used to fit the equilibrium data, and it was found that the adsorption isotherm followed the Langmuir model.

scholarly journals Highly Efficient Methylene Blue Dye Removal by Nickel Molybdate Nanosorbent

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1378
Author(s):  
Souad Rakass ◽  
Hicham Oudghiri Hassani ◽  
Ahmed Mohmoud ◽  
Fethi Kooli ◽  
Mostafa Abboudi ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Kinetic Studies ◽  
Cost Effective ◽  
Solution Concentration ◽  
Lower Amount ◽  
Blue Dye ◽  
Order Kinetic ◽  
Thermal Regeneration ◽  
Nickel Molybdate ◽  
Adsorbent Dose

Removing methylene blue (MB) dye from aqueous solutions was examined by the use of nickel molybdate (α-NiMoO4) as an adsorbent produced by an uncomplicated, rapid, and cost-effective method. Different results were produced by varying different parameters such as the pH, the adsorbent dose, the temperature, the contact time, and the initial dye concentration. Adsorbent dose and pH had a major removal effect on MB. Interestingly, a lower amount of adsorbent dose caused greater MB removal. The amount of removal gained was efficient and reached a 99% level with an initial methylene blue solution concentration of ≤160 ppm at pH 11. The kinetic studies indicated that the pseudo-second-order kinetic model relates very well with that of the obtained experimental results. The thermodynamic studies showed that removing the MB dye was favorable, spontaneous, and endothermic. Impressively, the highest quantity of removal amount of MB dye was 16,863 mg/g, as shown by the Langmuir model. The thermal regeneration tests revealed that the efficiency of removing MB (11,608 mg/g) was retained following three continuous rounds of recycled adsorbents. Adsorption of MB onto α-NiMoO4 nanoparticles and its regeneration were confirmed by Fourier transform infrared spectroscopy (FTIR) analysis and scanning electron microscopy (SEM) analysis. The results indicated that α-NiMoO4 nanosorbent is an outstanding and strong candidate that can be used for removing the maximum capacity of MB dye in wastewater.

scholarly journals Optimization of Chitosan Glutaraldehyde-Crosslinked Beads for Reactive Blue 4 Anionic Dye Removal Using a Surface Response Methodology

Life ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 85
Author(s):  
Johanna Galan ◽  
Jorge Trilleras ◽  
Paula A. Zapata ◽  
Victoria A. Arana ◽  
Carlos David Grande-Tovar
Keyword(s):  
Dye Adsorption ◽  
Aquatic Organisms ◽  
Coefficient Of Determination ◽  
Blue Dye ◽  
Crosslinking Reaction ◽  
Anionic Dyes ◽  
Initial Concentration ◽  
Swelling Degree ◽  
Industrial Level ◽  
Adsorbent Dose

The use of dyes at an industrial level has become problematic, since the discharge of dye effluents into water disturbs the photosynthetic activity of numerous aquatic organisms by reducing the penetration of light and oxygen, in addition to causing carcinogenic diseases and mutagenic effects in humans, as well as alterations in different ecosystems. Chitosan (CS) is suitable for removing anionic dyes since it has favorable properties, such as acquiring a positive charge and a typical macromolecular structure of polysaccharides. In this study, the optimization of CS beads crosslinked with glutaraldehyde (GA) for the adsorption of reactive blue dye 4 (RB4) in an aqueous solution was carried out. In this sense, the response surface methodology (RSM) was applied to evaluate the concentration of CS, GA, and sodium hydroxide on the swelling degree in the GA-crosslinked CS beads. In the same way, RSM was applied to optimize the adsorption process of the RB4 dye as a function of the initial pH of the solution, initial concentration of the dye, and adsorbent dose. The crosslinking reaction was investigated by scanning electron microscopy (SEM), Fourier transformed infrared spectroscopy (FTIR), and X-ray diffractometry (XRD). The design described for the swelling degree showed an R2 (coefficient of determination) adjusted of 0.8634 and optimized concentrations (CS 3.3% w/v, GA 1.7% v/v, and NaOH 1.3 M) that were conveniently applied with a concentration of CS at 3.0% w/v to decrease the viscosity and facilitate the formation of the beads. In the RB4 dye adsorption design, an adjusted R2 (0.8280) with good correlation was observed, where the optimized conditions were: pH = 2, adsorbent dose 0.6 g, and initial concentration of RB4 dye 5 mg/L. The kinetic behavior and the adsorption isotherm allowed us to conclude that the GA-crosslinked CS beads’ adsorption mechanism was controlled mainly by chemisorption interactions, demonstrating its applicability in systems that require the removal of contaminants with similar structures to the model presented.

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