A comparative examination of the adsorption mechanism of an anionic textile dye (RBY 3GL) onto the powdered activated carbon (PAC) using various the isotherm models and kinetics equations with linear and non-linear methods

2015 ◽  
Vol 354 ◽  
pp. 279-284 ◽  
Author(s):  
Metin Açıkyıldız ◽  
Ahmet Gürses ◽  
Kübra Güneş ◽  
Duygu Yalvaç
Keyword(s):  
Activated Carbon ◽  
Adsorption Mechanism ◽  
Powdered Activated Carbon ◽  
Isotherm Models ◽  
Textile Dye ◽  
Non Linear ◽  
Comparative Examination

scholarly journals Removal of organic pollutants from produced water by batch adsorption treatment

2021 ◽  
Author(s):  
Eman Hashim Khader ◽  
Thamer Jassim Mohammed ◽  
Nourollah Mirghaffari ◽  
Ali Dawood Salman ◽  
Tatjána Juzsakova ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Produced Water ◽  
Oxygen Demand ◽  
Powdered Activated Carbon ◽  
Pollutant Removal ◽  
Operating Conditions ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Zeolite X

AbstractThis paper studied the adsorption of chemical oxygen demand (COD), oil and turbidity of the produced water (PW) which accompanies the production and reconnaissance of oil after treating utilizing powdered activated carbon (PAC), clinoptilolite natural zeolite (CNZ) and synthetic zeolite type X (XSZ). Moreover, the paper deals with the comparison of pollutant removal over different adsorbents. Adsorption was executed in a batch adsorption system. The effects of adsorbent dosage, time, pH, oil concentration and temperature were studied in order to find the best operating conditions. The adsorption isotherm models of Langmuir, Freundlich and Temkin were investigated. Using pseudo-first-order and pseudo-second-order kinetic models, the kinetics of oil sorption and the shift in COD content on PAC and CNZ were investigated. At a PAC adsorbent dose of 0.25 g/100 mL, maximum oil removal efficiencies (99.57, 95.87 and 99.84 percent), COD and total petroleum hydrocarbon (TPH) were identified. Moreover, when zeolite X was used at a concentration of 0.25 g/100 mL, the highest turbidity removal efficiency (99.97%) was achieved. It is not dissimilar to what you would get with PAC (99.65 percent). In comparison with zeolites, the findings showed that adsorption over PAC is the most powerful method for removing organic contaminants from PW. In addition, recycling of the consumed adsorbents was carried out in this study to see whether the adsorbents could be reused. Chemical and thermal treatment will effectively regenerate and reuse powdered activated carbon and zeolites that have been eaten. Graphic abstract

Treatment of textile dye effluents using coagulation–flocculation coupled with membrane processes or adsorption on powdered activated carbon

Desalination ◽  
2009 ◽  
Vol 235 (1-3) ◽  
pp. 330-339 ◽  
Author(s):  
Farida Harrelkas ◽  
Abdelaziz Azizi ◽  
Abdelrani Yaacoubi ◽  
Ahmed Benhammou ◽  
Marie Noelle Pons
Keyword(s):  
Activated Carbon ◽  
Powdered Activated Carbon ◽  
Textile Dye ◽  
Membrane Processes

scholarly journals Non-linear Regression Analysis for the Adsorption Kinetics and Equilibrium Isotherm of Phenacetin onto Activated Carbons

2019 ◽  
pp. 1-18 ◽  
Author(s):  
Christian Sadeu Ngakou ◽  
Gabche Solomon Anagho ◽  
Horace Manga Ngomo
Keyword(s):  
Experimental Data ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Linear Regression Analysis ◽  
Xrd Analysis ◽  
Strong Interactions ◽  
Isotherm Models ◽  
Linear Isotherm ◽  
Non Linear ◽  
Best Fit

Activated carbon obtained from ayous sawdust, Cucurbitaceae (egussi) peelings and the mixture of the two were studied for the adsorption of phenacetin. Characterisation of activated carbon by SEM and XRD analysis shows that the mixture of precursors combine the properties of activated carbon obtained separately. The well-knownbatch sorption models– Langmuir (one and two sites), Freudlich, Tempkin, Elovich, Langmuir-Freudlich, Redlich Peterson, Radke-Prausnitz, Fritz Shlunder)—were tested with experimental data for the adsorption of phenacetin to estimate adsorption equilibrium parameters—rate constantsand adsorption capacities. The model with the best fit was identified from extensive statistical analysis of the results of nonlinear regression of the experimental data. Comparison of the statistical errors in parameter estimation between linear and non-linear isotherm models shows that transformation of non-linear isotherm equations to linear forms implicitly alter their error structure. The much smaller size of the various error indicators —Determination Coefficient, R2; Sum of Square Errors, SSE; Chi Test, χ2; Average Relative Errors, ARE—, calculated for the case of non linearization when compared to linearization, indicate the greater accuracy in the application of non linearization. The Langmuir model (one site) gave the best fit and thus the values of adsorption capacity for each activated carbon were calculated from it. Kinetic models show that weak and strong interactions are involved in the adsorption process and that the controlling mechanism may not be limited to intra particle diffusion. The lower value of the boundary layer thickness in the case of activated carbon obtained from the mixture, justified the higher adsorbed quantity of this activated carbon compared to those of activated carbon from each precursor.

The adsorption-desorption mechanisms on the powdered activated carbon (PAC) of an anionic textile dye (RBY 3GL)

2017 ◽  
Vol 70 ◽  
pp. 134-138
Author(s):  
Ahmet Gürses ◽  
Duygu Yalvaç ◽  
Kübra Güneş ◽  
Elif Şahin ◽  
Metin Açıkyıldız
Keyword(s):  
Activated Carbon ◽  
Powdered Activated Carbon ◽  
Textile Dye ◽  
Adsorption Desorption

Removal of basic dyes from aqueous solutions by activated carbon derived from Eichornia crassipes: equilibrium and kinetic studies

2014 ◽  
Vol 49 (2) ◽  
pp. 163-178 ◽  
Author(s):  
Syed Usman Nasrin Banu ◽  
G. Maheswaran
Keyword(s):  
Activated Carbon ◽  
Linear Regression ◽  
Second Order ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Non Linear ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
Eichornia Crassipes ◽  
Best Fit

The feasibility of preparing activated carbon from Eichornia crassipes by chemical activation was investigated. Batch experiments were carried out for the sorption of Methylene Blue (MB) and Rhodamine B (RB) onto the prepared activated carbon. The variables studied were initial dye concentration, pH, adsorbent dose, and contact time. Equilibrium data for the adsorption of the dyes onto activated carbon were obtained from batch adsorption experiments. Two-parameter isotherm models including Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich were employed for fitting equilibrium data. Three-parameter isotherm models including Redlich–Peterson, Toth, and Koble–Corrigan models were also employed for fitting the equilibrium data. Linear and non-linear regression methods were used to determine the best fit model to the equilibrium data. It was found that non-linear regression is a better method for determining isotherm parameters. The data were fitted to pseudo-first-order, pseudo-second-order, intraparticle diffusion model, and Elovich equation. The pseudo-second-order model gave the best fit to the equilibrium data as seen from correlation coefficient values. Fourier transform infrared spectroscopy and scanning electron microscopic investigations were carried out to confirm the morphological characteristics of the adsorbent. The prepared activated carbon had greater affinity for adsorbing MB when compared to RB.

Application of Coagulation Systems Coupled with Adsorption on Powdered Activated Carbon to Textile Wastewater Treatment

2009 ◽  
Vol 4 (4) ◽  
Author(s):  
Franciele Regina Furlan ◽  
Laís Graziela de Melo da Silva ◽  
Ayres Ferreira Morgado ◽  
Antônio Augusto Ulson de Souza ◽  
Selene Maria Arruda Guelli Ulson de Souza
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Sodium Chloride ◽  
Adsorption Process ◽  
Reactive Dyes ◽  
Powdered Activated Carbon ◽  
Toxicity Tests ◽  
Isotherm Models ◽  
Solution Ph ◽  
Increased Temperature

The aim of the present study was to investigate the removal of reactive dyes, Black 5 and Orange 16, through a combined coagulation/adsorption process on activated carbon. A coconut-based powdered activated carbon was used as an adsorbent and aluminum chloride was chosen as the coagulant. In order to obtain the best removal conditions for these dyes, the influence of the following parameters were investigated: coagulant dosage, aqueous solution pH, addition of sodium chloride and the application of increased temperature plus sodium chloride. Adsorption results for the reactive dyes were analyzed by Langmuir and Freundlich isotherm models and showed good correlation. The presence of sodium chloride in the mixture resulted in significant adsorption improvement. The influence of increased temperature plus sodium chloride on the dye removal from aqueous solution showed the feasibility of adsorption and its endothermic nature. Through the reactivation experiments it was verified that the adsorbent can be reused three times, consecutively, after the first adsorption with the virgin carbon. For the final evaluation of the effluent, obtained after the coagulation and adsorption process, acute toxicity tests were carried out with Daphnia magna, and the results obtained showed that the final effluent was not toxic. The combined coagulation/adsorption process was found to be an excellent option for the removal of reactive dyes.

scholarly journals Removal of Organic Pollutantsfrom Produced Water by Batch Adsorption Treatment

2021 ◽  
Author(s):  
Eman Hashim Khader ◽  
Thamer Jassim Mohammed ◽  
Nourollah Mirghaffari ◽  
ali Dawood Salman ◽  
Tatjána Juzsakova ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Produced Water ◽  
Oxygen Demand ◽  
Powdered Activated Carbon ◽  
Pollutant Removal ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Zeolite X ◽  
Operational Conditions ◽  
Sorption System

Abstract This paper investigates the adsorption of oil, chemical oxygen demand (COD) and turbidity of the produced water (PW) which accompanies the oil exploration and production after treatment by using powdered activated carbon (PAC), clinoptilolite natural zeolite (CNZ) and synthetic zeolite type X (XSZ). Moreover, the paper deals with the comparison of pollutant removal over different adsorbents. Sorption was carried out in batch sorption system. The operating factors including adsorbent dosage, time, pH, oil concentration and temperature were investigated to determine the optimum operational conditions. Three adsorption isotherm models (Langmuir, Freundlich and Temkin models) were applied. The kinetics of the oil sorption and the change in COD content over on PAC and CNZ were studied by using pseudo-first order and pseudo-second order kinetics models. Maximum oil removal efficiencies (99.57, 95.87 and 99.84%), COD and total petroleum hydrocarbon (TPH), respectively were found at PAC adsorbent dose of 0.25 g/100 mL. However, maximum turbidity removal efficiency (99.97%) was obtained when zeolite X was used at 0.25g/100 mL concentration. It is not very different from that obtained over PAC (99.65%). The results proved that adsorption over PAC is most effective compared to zeolites in the removal of organic pollutants from PW. Also, regeneration of the consumed adsorbents was carried out in this work to find out the possibility of reusing the adsorbents. The consumed powdered activated carbon and zeolites can be effectively regenerated and reused by chemical treatment and thermal treatment respectively.

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