scholarly journals A Study on the Removal Characteristics of Malachite Green Dye from Wastewater by Low-Cost Nano Porous Adsorbent

2017 ◽  
Vol 6 (1) ◽  
Keyword(s):  
Malachite Green ◽  
Low Cost ◽  
Malachite Green Dye ◽  
Porous Adsorbent

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 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.

Adsorption removal of malachite green dye from aqueous solution

2018 ◽  
Vol 34 (3) ◽  
pp. 427-453 ◽  
Author(s):  
Kshitij Tewari ◽  
Gaurav Singhal ◽  
Raj Kumar Arya
Keyword(s):  
Aqueous Solution ◽  
Malachite Green ◽  
Dye Removal ◽  
Low Cost ◽  
Agricultural Waste ◽  
Malachite Green Dye ◽  
Adsorption Removal ◽  
Adsorption Data ◽  
The Cost ◽  
Cost Feasibility

Abstract In this review, the state of the art on the removal of malachite green dye from aqueous solution using adsorption technique is presented. The objective is to critically analyze different adsorbents available for malachite green dye removal. Hence, the available recent literature in the area is categorized according to the cost, feasibility, and availability of adsorbents. An extensive survey of the adsorbents, derived from various sources such as low cost biological materials, waste material from industry, agricultural waste, polymers, clays, nanomaterials, and magnetic materials, has been carried out. The review studies on different adsorption factors, such as pH, concentration, adsorbent dose, and temperature. The fitting of the adsorption data to various models, isotherms, and kinetic regimes is also reported.

Exclusion of Organic Dye Using Neoteric Activated Carbon Prepared from Cornulaca monacantha Stem: Equilibrium and Thermodynamics Studies

2016 ◽  
Vol 875 ◽  
pp. 1-15 ◽  
Author(s):  
Arush Sharma ◽  
Gaurav Sharma ◽  
Amit Kumar ◽  
Zia Mahmood Siddiqi ◽  
Gaurav Sharma
Keyword(s):  
Activated Carbon ◽  
Malachite Green ◽  
Low Cost ◽  
Entropy Change ◽  
Sorption Process ◽  
Second Order ◽  
Adsorption Parameters ◽  
Malachite Green Dye ◽  
Endothermic Process ◽  
Pseudo Second Order

In this study, Cornulacamonacantha stem (CMS) has been used for the preparation of highly competent, ecofriendly and low-cost activated carbon (CMSAC) biosorbent. It was characterized by some instrumental techniques such as Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). The biosorbent was evaluated for the eradication of hazardous malachite green (MG) dye from aqueous solution. Batch experiments were conducted to assess the effect of various adsorption parameters such initial dye concentration, sorbent dosage, pH, agitation time and temperature. The results indicated that maximum sorption of MG was occurred at the pH ranged from 10.0 to 12.0. Langmuir, Freundlich and Tempkin isotherms were applied for the interpretation of experimental data and Langmuir model was found to be strongly fitted with higher R2 (0.999). The kinetics studies were examined using pseudo-first-order, pseudo-second-order, Elovich model. The sorption process was described by pseudo-second-order kinetics. The thermodynamic parameters such as energy change (ΔG°), enthalpychange (ΔH°) and entropy change (ΔS°) were found to be-6.21kJ/mol, 46.17 kJ/mol and 172.81 J/mol/K, respectively. The adsorption performance of malachite green dye onto gleaming activated carbon developed from Cornulacamonacantha stem was found to be spontaneous, feasible and endothermic process.

scholarly journals Thermodynamic and Isotherm Analysis on the Removal of Malachite Green Dye Using Thespesia Populnea Bark

2012 ◽  
Vol 9 (4) ◽  
pp. 2575-2588 ◽  
Author(s):  
R. Prabakaran ◽  
S. Arivoli
Keyword(s):  
Malachite Green ◽  
Langmuir Isotherm ◽  
Low Cost ◽  
Isotherm Models ◽  
Acid Activation ◽  
Malachite Green Dye ◽  
Thespesia Populnea ◽  
Initial Ph ◽  
Dye Absorption ◽  
Equilibrium Data

Activated carbon was synthesized from Thespesia Populnea Bark, a low cost material, by sulphuric acid activation; it was tested for its ability to eliminate malachite green in aqueous solution. The parameters studied included contact time, initial dye concentration, carbon dose, pH and temperature. The adsorption followed first order rate equation. In addition, it was found that the adsorption process was described by Freundlich and Langmuir isotherm models. Those models were applied to the equilibrium data. The absorption capacities (Qm) obtained from the Langmuir isotherm plots were 349.20, 365.43, 476.44, and 389.96 mg/g at 30°, 40°, 50°, and 60°C, respectively, at an initial pH 6.0. The temperature variation study showed that the malachite green dye absorption was endothermic and spontaneous with increased randomness at the solid solution interface. The thermodynamic parameters like ∆H°, ∆S°, and ∆G° were calculated from the slope and intercept of the linear plots.

Sign in / Sign up

Export Citation Format

Share Document