Removal of iron from drinking water by electrocoagulation: Adsorption and kinetics studies

Vasudevan, Subramanyan; Jayaraj, Jeganathan; Lakshmi, Jothinathan; Sozhan, Ganapathy

doi:10.1007/s11814-009-0176-9

Cited by 77 publications

(31 citation statements)

References 27 publications

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“…K f value of 11.7841 and 1/n value of 0.3957 were obtained from the plot. Value of 1/n between 0 and 1 is the indication of good sorption [65][66][67][68]. In the present study, a value of 0.3957 was obtained and it indicates that the sorption of MG dye onto the AgNPs was favourable.…”

Section: Freundlich Isothermsupporting

confidence: 60%

Isotherm and kinetic studies on adsorption of malachite green using chemically synthesized silver nanoparticles

Pandian

Karthikeyan

Rajasimman

2017

Nanotechnol. Environ. Eng.

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In the present study, chemically synthesized silver nanoparticles (AgNPs) were used for adsorption of the dye malachite green (MG). The process variables such as nanoparticle dosage, pH and temperature were optimized for the decolourization of MG dye solution using the response surface methodology (RSM). At the optimized parameter condition, studies were carried out for effects with respect to various concentrations of dye and time for isotherm and kinetic studies, respectively. RSM was also employed for the enhanced production of silver nanoparticles (AgNPs). Synthesized AgNPs were characterized by UV-Vis spectroscopic, scanning electron microscopic and Fourier transform infrared analyses. From the results, it was concluded that the AgNPs readily decolourized MG dye. At the optimized conditions, maximum removal (more than 90%) of MG dye occurred. It was also found that the D-R isotherm and intraparticle diffusion fitted the data better as compared to other isotherm and kinetic models.

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Section: Freundlich Isothermsupporting

confidence: 60%

Isotherm and kinetic studies on adsorption of malachite green using chemically synthesized silver nanoparticles

Pandian

Karthikeyan

Rajasimman

2017

Nanotechnol. Environ. Eng.

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“…These include, electrode material (Bagga et al, 2008;Gomes et al, 2007;Chou et al, 2009) inter-electrode spacing (Dalvand et al, 2011), current density (Arslan-Alaton et al, 2008), initial concentration/dose (Mouedhen et al, 2008;Mkpenie et al, 2014), initial pH (Sasson et al, 2009;Irdemez et al, 2006), supporting electrolyte (Trompette and Vergnes, 2009), electrolysis/treatment time (Giwa et al, 2012;Avsar et al, 2012) and temperature (Katal and Pahlavanzadeh, 2011;Vasudevan et al, 2009a;Yilmaz et al, 2008a).…”

Section: Introductionmentioning

confidence: 99%

Electrocoagulation of Azo-2-Naphthol Dye Using Aluminium Electrodes: Effect of Solvent and Kinetics of Adsorption

Mkpenie¹,

Abakedi²

2015

Current Research in Chemistry

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ABSTRACT1-Phenylazo-2-naphthol (PAN) was subjected to electrocoagulation using a 0.3 A d.c electrolytic cell in various solvents including ethanol, acetone, benzene and n-hexane. The extent of decolourization of PAN in the solvents has been determined. The highest decolourization was achieved in ethanol with colour removal efficiency of 63% within the first 15 min and 79% after 120 min of electrocoagulation. The decolourization of PAN in the solvents is observed to follow the order: Ethanol>n-hexane>benzene>acetone. The electrocoagulation data has also been interpreted based on adsorption kinetic models. Electrocoagulation of PAN in all the solvents obeyed the pseudo-second order kinetic model and Elovich kinetic model.

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“…Recent research has demonstrated that electrocoagulation offers an attractive alternative method for treating water [18]. EC treatment is characterized by simple and easy operated equipment, short operation time, no addition of chemicals and low sludge production.…”

Section: Introductionmentioning

confidence: 99%

Removal of tetracycline by electrocoagulation: Kinetic and isotherm modeling through adsorption

Ouaissa

Chabani

Amrane

et al. 2014

Journal of Environmental Chemical Engineering

108

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The use of antibiotics and growth hormones in human and veterinary medicine has a significant effect on the quality of surface and groundwater. The relevance of an electrocoagulation (EC) process for the removal of an antibiotic selected because of its wide application, high solubility in water, high residual toxicity and an absence of biodegradability, was examined in this study.Metal hydroxides generated during EC were used to remove tetracycline (TC) from aqueous solution. The knowledge regarding the removal mechanism of this substance has not been investigated up to now. Experiments were carried out in a batch electrochemical reactor using aluminum electrodes. The removal of TC was relatively fast and equilibrium was reached within 15 min. The effects of the main operating parameters were examined and showed that irrespective of the initial concentration and for pH ranging from 3 to 10, maximum removal efficiency remained close to 99%; while a sharp decrease was recorded at pH 2 (10 % removal).The results of this study also showed that the removal of TC from water was strongly affected by the current intensity. The mechanism of electrocoagulation was modeled using isotherm models and showed that the Sips isotherm matched satisfactorily experimental data, suggesting monolayer coverage of adsorbed molecules and assumed a quasi-Gaussian distribution energy owing to the high correlation also found for the Toth model. In addition, adsorption kinetic studies showed that the EC process followed a pseudo-second-order kinetic model at the various current densities, pH and initial antibiotic concentrations considered.

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Removal of iron from drinking water by electrocoagulation: Adsorption and kinetics studies

Cited by 77 publications

References 27 publications

Isotherm and kinetic studies on adsorption of malachite green using chemically synthesized silver nanoparticles

Isotherm and kinetic studies on adsorption of malachite green using chemically synthesized silver nanoparticles

Electrocoagulation of Azo-2-Naphthol Dye Using Aluminium Electrodes: Effect of Solvent and Kinetics of Adsorption

Removal of tetracycline by electrocoagulation: Kinetic and isotherm modeling through adsorption

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