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.

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 Utilization of a Novel Low-Cost Gibto (Lupinus Albus) Seed Peel Waste for the Removal of Malachite Green Dye: Equilibrium, Kinetic, and Thermodynamic Studies

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Adugna Nigatu Alene ◽  
Gietu Yirga Abate ◽  
Adere Tarekegne Habte ◽  
Desiew Mekuanint Getahun
Keyword(s):  
Adsorption Capacity ◽  
Malachite Green ◽  
Low Cost ◽  
Lupinus Albus ◽  
Proximate Analysis ◽  
Point Of Zero Charge ◽  
Alkaline Condition ◽  
Order Kinetic ◽  
Operational Parameters ◽  
Malachite Green Dye

The aim of this study was to investigate the adsorption characteristics of malachite green (MG) dye onto the raw (RLAPW) and activated (ALAPW) surface of Lupinus albus seed peel waste prepared via physicochemical activation under alkaline condition as a dye adsorbent. Proximate analysis, surface area (Sears’ method), point of zero charge (pHzpc), and FTIR analysis were used to characterize the adsorbents. The effects of operational parameters such as pH (4) for ALAPW and pH (6) for RLAPW, adsorbent dose (0.2 g), initial dye concentration (30 mg/L), contact time (60 min), and temperature (298 K) were optimized. The experimental data well fitted with the Freundlich adsorption isotherm with the adsorption capacity of 7.3 mg/g for activated Lupinus albus seed peel waste (ALAPW) and Sips isotherm for raw Lupinus albus seed peel waste (RLAPW) with the adsorption capacity of 6.6 mg/g. The kinetics data well fitted to pseudo-second-order kinetic model for both adsorbents. Thermodynamic study revealed that the bioadsorption process using bioadsorbents was spontaneous and exothermic in nature. Desorption experiment was conducted and showed desorption efficiency at an acidic pH of 2. The results showed that the prepared adsorbents exhibited good adsorption capacity and can be used as an alternative adsorbent for the adsorptive removal of malachite green dyes.

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 Sustainable adsorption method for the remediation of malachite green dye using nutraceutical industrial fenugreek seed spent

2021 ◽  
Author(s):  
Syed Noeman Taqui ◽  
Mohan C. S. ◽  
Bibi Ahmadi Khatoon ◽  
Manzoore Elahi M. Soudagar ◽  
T. M. Yunus Khan ◽  
...  
Keyword(s):  
Malachite Green ◽  
Low Cost ◽  
Aqueous Media ◽  
Freundlich Isotherm ◽  
Study Data ◽  
Isotherm Model ◽  
Adsorption Method ◽  
Fenugreek Seed ◽  
Malachite Green Dye ◽  
Pseudo Second Order

AbstractNutraceutical industrial fenugreek seed spent (NIFGS), a relatively low-cost material abundantly available with nearly negligible toxicity for the bioremediation of malachite green (MG) dye from aqueous media, is reported. Studies on the various parameters affecting the adsorption capacity of NIFGS were carried out to evaluate the kinetics and the equilibrium thermodynamics. All the experiments were designed at about pH 7. The adsorption isotherm model proposed by Langmuir fits better than the Freundlich isotherm model. Kinetic study data confirms the viability of pseudo-second-order model. Calculated thermodynamic factors suggest that the adsorption phenomenon is endothermic, almost instantaneous, and physical in nature.

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