scholarly journals Development of activated carbon from Eichhornia Crassipes via chemical activation and its application to remove a synthetic dye

2019 ◽  
Vol 9 (5) ◽  
pp. 4394-4400 ◽  
Keyword(s):  
Activated Carbon ◽  
Eichhornia Crassipes ◽  
Functional Group ◽  
Adsorption Process ◽  
Chemical Activation ◽  
Order Model ◽  
Freundlich Model ◽  
Isotherm Study ◽  
Pseudo Second Order ◽  
Mb Adsorption

Dyes wastewater is listed as one of the largest water polluter in this world and cause problems to the environment as well as human health. The present study aims to investigate the adsorption of methylene blue, a cationic dye commonly used in industries by activated carbon derived from the water hyacinth stem (Eichhornia crassipes (Mart.) Solms). The removal of MB solution was affected by some parameters such as dosage, contact time, pH, and initial dye concentration. The present study showed that the optimum condition for the adsorption process was pH 7, the adsorbent dosage at 0.8 g with the equilibrium was reached at 100 minutes. However, there is no significant adsorption in the effect of pH. It was found that the best correlation of kinetic with the MB adsorption was the pseudo-second-order model, while the isotherm study was well represented with the Freundlich model. The porosity of adsorbent was enhanced after carbonization process. The functional group presence on the surface of adsorbent including alcohols, carboxyl and carbonyl were also contributed to the effectiveness of adsorption process.

scholarly journals Batch adsorption studies for ketoprofen removal via Dillenia Indica peel activated carbon

2021 ◽  
Vol 920 (1) ◽  
pp. 012010
Author(s):  
F Fadzail ◽  
M Hasan ◽  
Z Mokhtar ◽  
N Ibrahim ◽  
O S An ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Process ◽  
Chemical Activation ◽  
Batch Adsorption ◽  
Order Model ◽  
Batch Mode ◽  
Adsorbent Dosage ◽  
Pseudo Second Order ◽  
Dillenia Indica ◽  
Experimental Findings

Abstract Removal of ketoprofen using Dillenia Indica peel activated carbon was investigated using batch adsorption at a laboratory scale. Chemical activation method with the aid of phosphoric acid was utilised in preparing the activated carbon. The adsorption experiments were evaluated using various factors which, are initial concentration, adsorbent dosage, and pH of ketoprofen. The optimum condition was determined to be at pH 6 and adsorbent dosage of 0.4 g with a most KTP uptake of 8.354 mg/g. The experimental findings showed that adsorption is favorable at lower pH. Isotherm studies were conducted and the data indicated that Langmuir isotherm was well fitted to the adsorption process and the pseudo-second-order model was more preferable in simulating the kinetic process. In essence, Dillenia Indica peel activated carbon was proven as being a favourable adsorbent for the uptake of ketoprofen in batch mode.

Ultrasound and microwave-assisted preparation of Fe-activated carbon as an effective low-cost adsorbent for dyes wastewater treatment

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 78936-78946 ◽  
Author(s):  
Song Cheng ◽  
Libo Zhang ◽  
Hongying Xia ◽  
Jinhui Peng ◽  
Jianhua Shu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Removal Efficiency ◽  
Langmuir Isotherm ◽  
Low Cost ◽  
Order Model ◽  
Microwave Assisted ◽  
Pseudo Second Order ◽  
Mb Adsorption

A and B are Langmuir isotherm and pseudo-second-order model. We conclude that MB adsorption capacity of Fe-activated carbon is bigger than raw activated carbon, indicating that Fe-activated carbon has better MB removal efficiency.

Absorption Behavior of a Modified Cellulose Hydrogel for both Fluoride and Arsenic

2013 ◽  
Vol 726-731 ◽  
pp. 733-738 ◽  
Author(s):  
Ling Die Meng ◽  
Min Wu ◽  
Ye Tian ◽  
Shigenori Kuga ◽  
Yong Huang
Keyword(s):  
High Efficiency ◽  
Adsorption Process ◽  
Intraparticle Diffusion ◽  
Order Model ◽  
Arsenic Adsorption ◽  
Freundlich Model ◽  
Intraparticle Diffusion Model ◽  
Cellulose Hydrogel ◽  
Pseudo Second Order ◽  
Modified Cellulose

This work reports a cationic modified cellulose hydrogel for fluoride and arsenic adsorption. This adsorbent had a high efficiency in removal of F-, AsO2- and AsO43- simultaneously from aqueous solutions, even at low initial concentrations. Adsorption kinetics showed the relatively rapid rate to reach equilibrium, as could be explained by the pseudo-second-order model and the intraparticle diffusion model within 20 min before the equilibrium. Freundlich model could fit the adsorption process best, and the results showed the improved arsenic adsorption performances especially for AsO43-, much larger than other reported absorbents.

Study on Adsorption of Methylene Blue by Sarch-g-Polyacrylamide

2014 ◽  
Vol 881-883 ◽  
pp. 1175-1178
Author(s):  
Xu Man Wang ◽  
Cai Ning Zhang
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Adsorption Isotherm ◽  
Adsorption Process ◽  
Sorption Process ◽  
Kinetics Analysis ◽  
Order Model ◽  
Grafting Polymerization ◽  
Pseudo Second Order ◽  
Mb Adsorption

By means of grafting polymerization, cross-linked starch-g-polyacrylamide (starch-g-PAM) was prepared and used to adsorb methylene blue (MB). Adsorption isotherm and kinetic of the sorption process were studied. The experimental results demonstrated that the prepared starch-g-PAM was an effective adsorbent for removal of MB from aqueous solution. The adsorption of MB by starch-g-PAM was Freundlich type, and the adsorption equation was caculated to be . Furthermore, the adsorption kinetics analysis demonstrated that the adsorption process followed the pseudo-second-order model.

scholarly journals Removal of methylene blue from aqueous solution using cocoa (Theobroma cacao) nib-based activated carbon treated with hydrochloric acid

2018 ◽  
Vol 14 (2) ◽  
pp. 193-197 ◽  
Author(s):  
Mohd Sukri Hassan ◽  
Khairul Adli Nikman ◽  
Fisal Ahmad
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Chemical Activation ◽  
Batch Adsorption ◽  
Activation Process ◽  
Order Model ◽  
Experimental Isotherm ◽  
Pseudo Second Order ◽  
Adsorptive Properties

Chemical activation process was applied to prepare a cocoa nib-based activated carbon using potassium carbonate (K2CO3). The performance of the activated carbon in removing Methylene Blue from aqueous solution was investigated by batch adsorption studies. The adsorptive properties were studied in terms of initial concentration (C0: 100-300 mg/L) and contact time effects. The experimental isotherm data fitted well the Langmuir and Temkin models. The adsorption kinetic followed the pseudo-second-order model and Boyd model explained the mechanism of adsorption. The results indicate that the chemically produced activated cocoa nib carbon has significant potential to be used as an adsorbent material for adsorption of Methylene Blue from aqueous solution.

Characterizing o- and p-nitrophenols adsorption onto innovative activated carbon prepared from date pits

2013 ◽  
Vol 69 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Hossam Altaher ◽  
Andrea M. Dietrich
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Adsorption Process ◽  
Waste Product ◽  
Considerable Effect ◽  
Surface Functional Groups ◽  
Order Model ◽  
Pseudo Second Order ◽  
And Performance ◽  
Date Pits

The production and performance of activated carbon prepared from date pits was investigated. Date pits are an abundant local waste product in many countries; converting them to a commercial product would increase the sustainability of this fruit crop. The date pit activated carbon was shown to have similar characteristics of pore size and surface functional groups as other commercial carbons. Batch experiments were conducted with o- and p-nitrophenol to evaluate the performance of this carbon. Results were analyzed according to Langmuir, Freundlich, and Dubinin-Radushkevich adsorption isotherms. The adsorption capacity of o-nitrophenol was 142.9 mg/g while that of p-nitrophenol was 108.7 mg/g. The adsorption process was physical in nature. The position of the −NO2 group in the benzene ring has a considerable effect on the adsorption capacity and rate of uptake. The kinetic results showed that a pseudo second-order model appropriately describes the experimental data. The analysis of kinetic data revealed that the mechanism of adsorption is complex with both liquid film diffusion and intraparticle diffusion contributing to adsorption of both adsorbates.

scholarly journals Activated Carbon for Dyes Removal: Modeling and Understanding the Adsorption Process

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Y. El maguana ◽  
N. Elhadiri ◽  
M. Benchanaa ◽  
R. Chikri
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Methyl Orange ◽  
Adsorption Process ◽  
Second Order ◽  
Prickly Pear ◽  
Order Model ◽  
Seed Cake ◽  
Pseudo Second Order ◽  
Dyes Removal

Batch adsorption experiments have been conducted to investigate the removal of methyl orange from aqueous solution by an activated carbon prepared from prickly pear seed cake by phosphoric acid activation. The adsorption process has been described by using kinetic and isotherm models. The kinetic of adsorption was examined by pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. Adsorption isotherm was modeled using Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherms. The adsorption process of methyl orange was well explained by the pseudo-second-order model and Freundlich isotherm. Also, pseudo-n-order model has been applied to estimate the order of adsorption kinetic and it was found equal to 2 which confirm the good accuracy of the pseudo-second order. Moreover, Dubinin–Radushkevich isotherm reveals that the adsorption of methyl orange onto activated carbon was a physisorption process in nature. The adsorption capacity of activated carbon was found to be 336.12 mg/g at temperature 20°C and pH∼7. These results demonstrated that the prickly pear seed cake is a suitable precursor for the preparation of appropriate activated carbon for dyes removal from aqueous solution.

Removal of Pb (II) by CS2 Modified Kenaf Powder

2014 ◽  
Vol 970 ◽  
pp. 7-11 ◽  
Author(s):  
Siti Raihan Zakaria ◽  
Megat Ahmad Kamal Megat Hanafiah ◽  
Siti Norhafiza Mohd Khazaai ◽  
Zurhana Mat Hussin ◽  
Wan Khaima Azira Wan Mat Khalir ◽  
...  
Keyword(s):  
Industrial Applications ◽  
Langmuir Model ◽  
Hibiscus Cannabinus ◽  
Order Model ◽  
Freundlich Model ◽  
Isotherm Study ◽  
Adsorption Capacities ◽  
Good Potential ◽  
Pseudo Second Order ◽  
Adsorbent Characterization

Kenaf (Hibiscus cannabinus) is a hardy crop that has wide industrial applications such as insulator, paper, carpet padding, bedding and a good adsorbent for oil. This study investigated the ability of carbon disulfide (CS2) modified kenaf (CMK) to remove toxic Pb (II) from waste water. Adsorbent characterization was carried out by Field Emission Scanning Electron Microscope and Energy Dispersive X-ray Spectroscope (FESEM-EDX) analysis. The adsorption kinetic data was well described by pseudo-second-order model and the adsorption isotherm study indicated that Langmuir model fitted well with the experimental data than the Freundlich model. Based on the Langmuir model, the maximum adsorption capacities of Pb (II) (qmax) was 63.3 mg g-1 .This study suggested that CMK has a good potential to be used as an adsorbent material for Pb (II) removal from aqueous solutions.

scholarly journals Thermodynamic, Kinetic and Isotherm Study of 4-chloro-2-methyl Phenoxy Acetic Acid (MCPA) by (PV/S-g-3D-GO/N) from Aquatic Solutions

2020 ◽  
Author(s):  
Alireza Hajighasemkhan ◽  
Elham Moniri ◽  
Lobat Taghavi ◽  
Homayon Ahmad Panahi ◽  
Amir Hessam Hassani
Keyword(s):  
Acetic Acid ◽  
Removal Efficiency ◽  
Adsorption Process ◽  
Inlet Concentration ◽  
Optimum Conditions ◽  
Order Model ◽  
Phenoxy Acetic Acid ◽  
Isotherm Study ◽  
Adsorption Performance ◽  
Pseudo Second Order

Abstract BackgroundIn this study removal efficiency of 4-chloro-2-methyl-phenoxy acetic acid (MCPA) by 3D polymer nano-magnetic (PV/S-g-3D-GO/N) was investigated.MethodsThe effects of operation parameters including adsorbent mass, influent flow rate and inlet concentration on the adsorption performance are investigated.ResultsMaximum adsorption capacity (4.36 mg/g) was achieved at optimum conditions (pH: 3, contact time: 300 min, adsorbent dosage: 5 g/l and temperature: 50 °C). Moreover, adsorption isotherm and kinetics were agreed with the Langmuir model (R2 = 0.997) and pseudo-second-order model (R2 = 0.999), respectively. Thermodynamic studies also show that adsorption process was spontaneous (ΔG < 0) and endothermic (ΔH > 0).ConclusionAccording to removal efficiency (100%), this adsorbent is an excellent alternative for removal herbicide in high temperature industry.

Study on the Formaldehyde Adsorption Kinetics of Dry Waters

2014 ◽  
Vol 809-810 ◽  
pp. 907-911
Author(s):  
Jun Long Wang ◽  
Jie Hou ◽  
Ting Jiang ◽  
Yong Jun He ◽  
Yao Dong Liang
Keyword(s):  
Adsorption Kinetics ◽  
High Speed ◽  
Adsorption Process ◽  
Average Diameter ◽  
Adsorption Rate ◽  
Absorption Kinetics ◽  
Order Model ◽  
Pseudo Second Order ◽  
Kinetics Of ◽  
Formaldehyde Adsorption

Dry waters with an average diameter of 82 μm were prepared by a high speed mixed route. The formaldehyde absorption kinetics of dry waters was investigated by simulating indoor formaldehyde pollution in glass chamber. The results showed that pseudo-second order model could be used to simulate the adsorption process; the adsorption rate was highest in the initial 60 minutes; when the adsorption lasted for 180 minutes, the adsorption reached equilibrium.

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