Lead Sulphide Nanoparticles as Photocatalyst for the Degradation of Methylene Blue: Effects of pH, Time, Adsorption Kinetics and Recyclability Studies

2021 ◽  
Vol 31 (5) ◽  
pp. 2197-2208
Author(s):  
Peter A. Ajibade ◽  
Thandi B. Mbuyazi ◽  
Abimbola E. Oluwalana
Keyword(s):  
Methylene Blue ◽  
Adsorption Kinetics ◽  
Lead Sulphide ◽  
Effects Of Ph

scholarly journals Use of activated carbon from Sapindus for the adsorption of methylene blue

2018 ◽  
Vol 19 (1) ◽  
pp. 112-122 ◽  
Author(s):  
Taous Hamad ◽  
◽  
Zoubir Benmaamar ◽  
Mohamad Nedjioui ◽  
Ahmed Boucherit ◽  
...  
Keyword(s):  
Experimental Data ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Adsorption Kinetics ◽  
Low Cost ◽  
Distribution Functions ◽  
Blue Dye ◽  
Experimental Conditions ◽  
Effects Of Ph ◽  
Best Fit

Activated carbon was produced from Sapindusfruitresidue and wasused for the adsorption of methylene blue dye from simulated aqueous solution. Adsorption kinetics of methylene blue onto actived carbonwerestudied in a batch system. The effects of pH and contact time were examined. The goal of the present study was the determination of the optimal experimental conditions. The maximum adsorption of methylene blue occurredat pH 6.0(4.83 mg/g) and the lowest adsorption occurred at pH 2.0(4.35 mg/g).120 min was the time needed for apparent equilibrium.Adsorption modelling was determined by using theFreundlich and Langmuir isotherms.Data were interpreted based on R2and various error distribution functions. Adsorption isotherm was best described bynon linear Freundlichisotherm model. In order to determine the best-fit-adsorption kinetics, the experimental data were analyzed using pseudo-first-order, pseudo-second-order, pseudo-third-order, Esquivel, and Elovichmodels. The needed relative parameters were determined bylinear and non-linear regressive methods. The statistical functions were estimated to find the suitable method which fit the experimental data. Both methods were suitable to obtain the required parameters. The model that best fit the present equilibrium data was the linear Elovichmodel (type 1 and 2). The present work showed that activated carbon can be used as a low cost adsorbent for the methylene blue removal from aqueous solutions.

Modification of graphene aerogel with titania nanotubes for efficient methylene blue adsorption kinetics

2021 ◽  
Vol 97 (2) ◽  
pp. 271-280
Author(s):  
Hongli Liu ◽  
Bo Gao ◽  
Wenjin Yuan ◽  
Hongyan Li ◽  
Jing Li ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Adsorption Kinetics ◽  
Titania Nanotubes ◽  
Graphene Aerogel ◽  
Methylene Blue Adsorption

Preparation, characterization and adsorption kinetics of methylene blue dye in reduced-graphene oxide supported nanoadsorbents

2020 ◽  
Vol 309 ◽  
pp. 113171 ◽  
Author(s):  
Mehmet Harbi Calimli ◽  
Mehmet Salih Nas ◽  
Hakan Burhan ◽  
Sibel Demiroglu Mustafov ◽  
Özkan Demirbas ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Adsorption Kinetics ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Reduced Graphene ◽  
Kinetics Of

Modeling and Optimization of Photocatalytic Degradation of Methylene Blue Using Lanthanum Vanadate

2020 ◽  
Vol 1008 ◽  
pp. 97-103
Author(s):  
Mahmoud Samy ◽  
Mona G. Ibrahim ◽  
Mohamed Gar Alalm ◽  
Manabu Fujii
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Removal Efficiency ◽  
Textile Industry ◽  
Degradation Process ◽  
Optimum Conditions ◽  
Photo Degradation ◽  
Operational Conditions ◽  
Degradation Rates ◽  
Effects Of Ph

Methylene blue (MB) is one of the commonly used dyes in the textile industry and can be used as a model pollutant for the textile industry wastewater. In this work, the photocatalytic degradation of MB by synthesized nanoparticles of lanthanum vanadate (LaVO4) was assessed. The effects of pH, initial MB concentration and catalyst dose on the removal performance of MB were investigated and measuring the optimum values of these operational conditions was performed using response surface methodology (RSM). Catalyst dose of 0.43 g/L, initial MB concentration of 5.0 mg/L, and pH of 6.86 were found to be the optimum conditions in reaction time of 60 min. A mathematical model was formed to relate the removal efficiency of MB to the aforementioned operating parameters. The removal efficiency of MB was 91% without any scavengers at a catalyst dose of 0.3 g/L, pH of 7 and initial MB concentration of 10 mg/L. The trapping experiments confirmed the participation of different reactive species in the photo-degradation process. The degradation rates of MB were 91%, 86%, 81%, 77.70% and 72% in five successive runs using LaVO4.

Studies relating to an electrochemically assisted coagulation for the removal of chromium from water using zinc anode

2011 ◽  
Vol 11 (2) ◽  
pp. 142-150 ◽  
Author(s):  
S. Vasudevan ◽  
J. Lakshmi
Keyword(s):  
Adsorption Kinetics ◽  
Current Density ◽  
Second Order ◽  
Rate Equations ◽  
Zinc Anode ◽  
Effects Of Ph ◽  
Equilibrium Data ◽  
Density Concentration ◽  
Chromium Adsorption ◽  
Kinetics And Isotherms

In this work, an electrochemically assisted coagulation for the removal of chromium from water has been studied using zinc as anode and galvanized iron as cathode. The effects of pH, current density, concentration of chromium, temperature, adsorption kinetics and isotherms on the removal of chromium were investigated. The results showed that the optimum removal efficiency of 96.5% was achieved at a current density of 0.2 A/dm2, at a pH of 7.0. First- and second-order rate equations, Elovich and intraparticle diffusion models were applied to study adsorption kinetics. The adsorption process follows second-order kinetics model with good correlation. An equilibrium isotherm was measured experimentally and the results were analyzed by the Langmuir, Freundlich and Dubinin-Redushkevich model using linearized correlation co-efficient. The Langmuir adsorption isotherm was found to fit the equilibrium data for chromium adsorption. Temperature studies showed that the adsorption was endothermic and spontaneous in nature.

Use of chabazite, a naturally abundant zeolite, for the investigation of the adsorption kinetics and mechanism of methylene blue dye

2016 ◽  
Vol 235 ◽  
pp. 78-86 ◽  
Author(s):  
Hamza Aysan ◽  
Serpil Edebali ◽  
Celalettin Ozdemir ◽  
Muazzez Celi̇k Karakaya ◽  
Necati Karakaya
Keyword(s):  
Methylene Blue ◽  
Adsorption Kinetics ◽  
Kinetics And Mechanism ◽  
Blue Dye ◽  
Methylene Blue Dye

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.

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