scholarly journals ADSORPTION STUDIES OF BASIC DYES ONTO TEAK (TECTONA GRANDIS) LEAF POWDER

2016 ◽  
Vol 9 (2) ◽  
pp. 102-108 ◽  
Author(s):  
Yash Mishra ◽  
V. Sowmya ◽  
S. Shanthakumar
Keyword(s):  
Methylene Blue ◽  
Malachite Green ◽  
Freundlich Isotherm ◽  
Tectona Grandis ◽  
Dye Molecules ◽  
Operational Parameters ◽  
Malachite Green Dye ◽  
Equilibrium Data ◽  
Leaf Powder ◽  
Good Potential

In this study, the adsorption potential of Teak (Tectona grandis) leaf powder (TLP) to remove Methylene blue (MB) and Malachite Green (MG) dye molecules from aqueous solution was investigated. Batch experiments were conducted to evaluate the influence of operational parameters such as, pH (2-9), adsorbent dosage (1-7 g/L), contact time (15-150 minutes) and initial dye concentration (20-120 mg/L) at stirring speed of 150 rpm, on the adsorption of MB and MG on TLP. The maximum removal efficiency of 98.4% and 95.1% was achieved for MB and MG dye, respectively. The experimental equilibrium data were analyzed using Langmuir, Freundlich and Temkin isotherms and it was found that it fitted well to the Freundlich Isotherm model. The surface structure and morphology of the adsorbent was characterized using Scanning electron microscopy (SEM) and the presence of functional groups and its interaction with the dye molecules were analyzed using Fourier transform infrared (FTIR). Based on the investigation, it has been demonstrated that the teak leaf powder has good potential for effective adsorption of Methylene blue and Malachite green dye.

scholarly journals ADSORPTION STUDIES OF BASIC DYES ONTO TEAK (TECTONA GRANDIS) LEAF POWDER

2016 ◽  
Vol 9 (2) ◽  
pp. 102-108
Author(s):  
Yash Mishra ◽  
V. Sowmya ◽  
S. Shanthakumar
Keyword(s):  
Methylene Blue ◽  
Malachite Green ◽  
Freundlich Isotherm ◽  
Tectona Grandis ◽  
Dye Molecules ◽  
Operational Parameters ◽  
Malachite Green Dye ◽  
Equilibrium Data ◽  
Leaf Powder ◽  
Good Potential

In this study, the adsorption potential of Teak (Tectona grandis) leaf powder (TLP) to remove Methylene blue (MB) and Malachite Green (MG) dye molecules from aqueous solution was investigated. Batch experiments were conducted to evaluate the influence of operational parameters such as, pH (2-9), adsorbent dosage (1-7 g/L), contact time (15-150 minutes) and initial dye concentration (20-120 mg/L) at stirring speed of 150 rpm, on the adsorption of MB and MG on TLP. The maximum removal efficiency of 98.4% and 95.1% was achieved for MB and MG dye, respectively. The experimental equilibrium data were analyzed using Langmuir, Freundlich and Temkin isotherms and it was found that it fitted well to the Freundlich Isotherm model. The surface structure and morphology of the adsorbent was characterized using Scanning electron microscopy (SEM) and the presence of functional groups and its interaction with the dye molecules were analyzed using Fourier transform infrared (FTIR). Based on the investigation, it has been demonstrated that the teak leaf powder has good potential for effective adsorption of Methylene blue and Malachite green dye.

scholarly journals Mechanism and Isotherm Modeling of Effective Adsorption of Malachite Green as Endocrine Disruptive Dye using Acid Functionalized Maize Cob (AFMC)

2021 ◽  
Author(s):  
John O Ojediran ◽  
Adewumi O. Dada ◽  
Stephen O. Aniyi ◽  
Robinson O. David
Keyword(s):  
Malachite Green ◽  
Removal Efficiency ◽  
Low Cost ◽  
Statistical Error ◽  
Freundlich Isotherm ◽  
Polluted Water ◽  
Operational Parameters ◽  
Isotherm Modeling ◽  
Malachite Green Dye ◽  
Maize Cob

Abstract Cationic Malachite green has been identified as a candidate of endocrine disruptive compound found in the environment. In this study, the mechanism and isotherm modeling of effective adsorption of cationic malachite green dye onto acid functionalized maize cob (AFMC) was investigated by batch technique. The operational parameters such as initial concentration (100–600 mg/L); contact time (10–120 mins) and pH (3–10) influenced the removal efficiency and quantity adsorbed. Maximum of 99.3% removal efficiency was obtained at optimum conditions. AFMC physicochemical properties (surface area 1329 m2/g and particle size 300µm<Ф<250µm) enhanced its efficiency. Based on R2 > 0.97 and consistently low values of SSE, X2, HYBRID and MSPD adsorption statistical error functions (ASEF), equilibrium data were best fitted to Freundlich isotherm. Kinetic data were best described by pseudo second-order model with consistent R2 > 0.98 and validated by ASEF. The mechanism of process was better described by intraparticle diffusion. Evidence of adsorption process was confirmed by change in morphology and surface chemistry determined by SEM and FTIR respectively. The performance of AFMC enlisted it as a sustainable and promising low-cost adsorbent from agro-residue for treatment of endocrine disruptive dye polluted water.

scholarly journals Silver nanoparticles loaded on activated carbon as a novels adsorbent for the competitive removal of Malachite green and Methylene blue

2015 ◽  
Vol 9 (2) ◽  
pp. 75-92 ◽  
Author(s):  
Maryam Tavakol ◽  
Parviz Aberoomand Azar ◽  
Mohammad Saber Tehrani ◽  
Mehrorang Ghaedi
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Activated Carbon ◽  
Malachite Green ◽  
Freundlich Isotherm ◽  
Morphological Properties ◽  
Hydroxyl Group ◽  
Batch Mode ◽  
Initial Ph ◽  
Equilibrium Data

In this study silver  nanoparticles by hydroxyl group (AgOH-NP) were synthesized and loaded on activated carbon prepared from Rosa canina tree (AgOH-NP-AC-RC). This new adsorbent was used for the removal of Malachite green and Methylene blue from aqueous medium.The morphological properties of the novel adsorbent were investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and FT-IR analysis. The removal both dyes in batch mode was investigated at various operating parameters like; contact time, initial pH, initial dye concentration and amount of adsorbents. The experimental equilibrium data were analyzed by using various models and it was seen that Freundlich isotherm model fitted well with adsorbtion capacity of 105 mg.g-1for Malachite green and 81.43 mg.g-1 for Methylene blue. The adsorption kinetic data followed pseudo second-order kinetics for removal both dyes.DOI: http://dx.doi.org/10.3126/ijls.v9i2.12053 International Journal of Life Sciences 9 (2) : 2015; 75-92

scholarly journals Kinetics, Equilibrium, and Thermodynamic Studies on Adsorption of Methylene Blue by Carbonized Plant Leaf Powder

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
V. Gunasekar ◽  
V. Ponnusami
Keyword(s):  
Methylene Blue ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Plant Leaf ◽  
Aqueous Effluent ◽  
Effects Of Ph ◽  
Equilibrium Data ◽  
Leaf Powder ◽  
Best Fitting ◽  
Pseudo Second Order

Carbon synthesized from plant leaf powder was employed for the adsorption of methylene blue from aqueous effluent. Effects of pH (2, 4, 6, 8, and 9), dye concentration (50, 100, 150, and 200 mg/dm3), adsorbent dosage (0.5, 1.0, 1.5, and 2.0 g/dm3), and temperature (303, 313, and 323 K) were studied. The process followed pseudo-second-order kinetics. Equilibrium data was examined with Langmuir and Freundlich isotherm models and Langmuir model was found to be the best fitting model with highR2and low chi2values. Langmuir monolayer adsorption capacity of the adsorbent was found to be 61.22 mg/g. From the thermodynamic analysis, ΔH, ΔG, and ΔSvalues for the adsorption of MB onto the plant leaf carbon were found out. From the values of free energy change, the process was found out to be feasible process. From the magnitude of ΔH, the process was found to be endothermic physisorption.

scholarly journals Malachite Green Dye Removal Using the Seaweed Enteromorpha

2011 ◽  
Vol 8 (2) ◽  
pp. 649-656 ◽  
Author(s):  
R. Jayaraj ◽  
M. Chandra Mohan ◽  
P. Martin Deva Prasath ◽  
T. Hidhayathullah Khan
Keyword(s):  
Aqueous Solution ◽  
Malachite Green ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Model Parameters ◽  
Adsorption Method ◽  
Malachite Green Dye ◽  
Equilibrium Data ◽  
Pseudo Second Order

Malachite green adsorption from an aqueous solution onto activatedEnteromorphacarbon has been studied experimentally using batch adsorption method. Adsorption kinetics and equilibrium were investigated as a function of initial dye concentration, pH, contact time and adsorbent dosage. Kinetics studies indicated that the adsorption followed pseudo second order reaction. Equilibrium data was analyzed using Langmuir and Freundlich isotherm models. The adsorption capacity ofEnteromorphawas found to be 94.74%. On the basis of experimental results and the model parameters, it can be inferred that the carbonaceousEnteromorphais effective for the removal of malachite green from aqueous solution.

scholarly journals Mechanism and isotherm modeling of effective adsorption of malachite green as endocrine disruptive dye using Acid Functionalized Maize Cob (AFMC)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
John O Ojediran ◽  
Adewumi Oluwasogo Dada ◽  
Stephen O Aniyi ◽  
Robinson O. David ◽  
Adejoke D Adewumi
Keyword(s):  
Malachite Green ◽  
Removal Efficiency ◽  
Low Cost ◽  
Statistical Error ◽  
Freundlich Isotherm ◽  
Polluted Water ◽  
Operational Parameters ◽  
Isotherm Modeling ◽  
Malachite Green Dye ◽  
Maize Cob

AbstractCationic Malachite green has been identified as a candidate for the endocrine disruptive compound found in the environment. In this study, the mechanism and isotherm modeling of effective adsorption of cationic malachite green dye onto acid-functionalized maize cob (AFMC) was investigated by batch technique. The operational parameters such as initial concentration (100–600 mg/L); contact time (10–120 min) and pH (3–10) influenced the removal efficiency and quantity adsorbed. A maximum of 99.3% removal efficiency was obtained at optimum conditions. AFMC physicochemical properties (surface area 1329 m2/g and particle size 300 μm < Ф < 250 μm) enhanced its efficiency. Based on R2 > 0.97 and consistently low values of adsorption statistical error functions (ASEF), equilibrium data were best fitted to Freundlich isotherm. Kinetic data were best described by a pseudo-second-order model with consistent R2 > 0.98 and validated by ASEF. The mechanism of the process was better described by intraparticle diffusion. Evidence of the adsorption process was confirmed by the change in morphology via Scanning Electron Microscopy (SEM) and surface chemistry by Fourier Transform infrared (FTIR). The performance of AFMC enlisted it as a sustainable and promising low-cost adsorbent from agro-residue for treatment of endocrine disruptive dye polluted water.

Adsorption characteristics of methylene blue onto agricultural wastes lotus leaf in bath and column modes

2011 ◽  
Vol 64 (3) ◽  
pp. 654-660 ◽  
Author(s):  
Xiuli Han ◽  
Wei Wang ◽  
Xiaojian Ma
Keyword(s):  
Methylene Blue ◽  
Fixed Bed ◽  
Isotherm Models ◽  
Column Experiments ◽  
Fixed Bed Column ◽  
Lotus Leaf ◽  
Bed Height ◽  
Column Adsorption ◽  
Equilibrium Data ◽  
Leaf Powder

The adsorption potential of lotus leaf to remove methylene blue (MB) from aqueous solution was investigated in batch and fixed-bed column experiments. Langmuir, Freundlich, Temkin and Koble–Corrigan isotherm models were employed to discuss the adsorption behavior. The results of analysis indicated that the equilibrium data were perfectly represented by Temkin isotherm and the Langmuir saturation adsorption capacity of lotus leaf was found to be 239.6 mg g−1 at 303 K. In fixed-bed column experiments, the effects of flow rate, influent concentration and bed height on the breakthrough characteristics of adsorption were discussed. The Thomas and the bed-depth/service time (BDST) models were applied to the column experimental data to determine the characteristic parameters of the column adsorption. The two models were found to be suitable to describe the dynamic behavior of MB adsorbed onto the lotus leaf powder column.

Adsorption of Methylene Blue on Modified Bentonite

2013 ◽  
Vol 726-731 ◽  
pp. 2380-2383
Author(s):  
Li Xia Li ◽  
Xin Dong Zhai
Keyword(s):  
Methylene Blue ◽  
Aqueous Solutions ◽  
Adsorption Kinetics ◽  
Freundlich Isotherm ◽  
Batch Process ◽  
Experimental Results ◽  
Order Model ◽  
Modified Bentonite ◽  
Equilibrium Data ◽  
Pseudo Second Order

Modified bentonite was used as adsorbent for the methylene blue adsorption in a batch process. Experimental results show that the adsorption kinetics is well described by pseudo-second-order model and the equilibrium data was better represented by the Freundlich isotherm model. The results revealed that the modified bentonite has the potential to be used as a good adsorbent for the removal of methylene blue from aqueous solutions.

Adsorptive Removal of Ni2+ from Aqueous Solution Using Rice Husk-Based Activated Carbon

2015 ◽  
Vol 754-755 ◽  
pp. 950-954
Author(s):  
Mohd Faisal Taha ◽  
Anis Suhaila Shuib ◽  
Maizatul Shima Shaharun ◽  
Azry Borhan
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Rice Husk ◽  
Textural Properties ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Adsorption Studies ◽  
Adsorptive Removal ◽  
Equilibrium Data ◽  
Good Potential

An attempt was made to study the potential of rice husk as an alternative cheap precursor for activated carbon to remove Ni2+ from aqueous solution. Rice husk was treated chemically (with NaOH) and physically (carbonization) to prepare rice husk based activated carbon (RHAC). The textural properties of RHAC, i.e. surface area (255 m2/g) and pore volume (0.17 cm2/g), were determined by N2 adsorption using Brunauer-Emmett-Teller (BET) surface analyzer. RHAC was also characterized for its morphology and its elemental compositions. The adsorption studies for the removal of Ni2+ from aqueous solution were carried out using different dosage of RHAC as adsorbent as a function of varied contact time. The concentration of Ni2+ was determined by atomic absorption spectrometer (AAS). The results obtained from adsorption studies indicate good potential of rice husk as a cheap precursor to produce activated carbon for the removal of Ni2+ from aqueous solution. The equilibrium data from adsorption studies fitted well the of Langmuir and Freundlich isotherm models.

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