Modelling and optimization of coagulation of highly concentrated industrial grade leather dye by response surface methodology

Khayet, M.; Zahrim, A. Y.; Hilal, Nidal

doi:10.1016/j.cej.2010.11.108

Cited by 164 publications

(50 citation statements)

References 32 publications

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“…Various technologies, such as coagulation/flocculation, chemical oxidation, filtration, membrane separation, and microbial degradation, have shown limited success in the treatment of dye-containing wastewaters [6][7][8], and adsorption is considered to be the most effective technique for water and wastewater *Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of NiFe2O4 nanoparticles for removal of anionic dyes from aqueous solution

Zandipak

Sobhanardakani

2016

Desalination and Water Treatment

100

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A B S T R A C TNiFe 2 O 4 nanoparticles (NiFe 2 O 4 NPs) were synthesized and characterized using X-ray diffraction, transmission electronic microscopy (TEM), pH pzc and Brunauer, Emmett, and Teller methods. Size of the nanostructures according to TEM was obtained around 12 nm. The prepared NiFe 2 O 4 NPs was used as an adsorbent for the removal of anionic dyes of Sunset Yellow, Tartrazine, and Eriochrome Black T from aqueous solutions. It was found that removal percentage significantly depends on the level of initial solution pH. The adsorption of anionic dyes on to NiFe 2 O 4 NPs was investigated from both equilibrium and kinetic point of view. Kinetic experiments were performed at three values of initial dyes concentration in the solution and the results of fitting to the experimental data by the nonlinear methods represent that fractal-like pseudo-second-order model can describe the kinetics of adsorption. Among the various conventional isotherm models, Langmuir-Freundlich is more suitable for analyzing the explanation data. The adsorption capacities of Sunset Yellow, Tartrazine, and Eriochrome Black T on NiFe 2 O 4 NPs were 107.1, 104.8, and 81.52 mg/g, respectively. Also, the method was applied to the removal of dyes in real samples (tap water, river water, and candy).

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Section: Introductionmentioning

confidence: 99%

Synthesis of NiFe2O4 nanoparticles for removal of anionic dyes from aqueous solution

Zandipak

Sobhanardakani

2016

Desalination and Water Treatment

100

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“…To optimize the levels of the selected variables, one can use the conventional experimentation method that involves changing one variable at a time, and maintaining the others fixed [5,10,11]. However, this experimentation method requires many experimental runs, that are time-consuming, and ignores the interaction effects between the parameters and leads to a low optimization efficiency [12]. Unlike the conventional method, statistical experimental designs can avoid these limitations and allow estimation of the effects of independent parameters and their interactions.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, response surface methodology (RSM) is an efficient way to design, build models, and analyze the effects of several independent variables in order to optimize processes for different research types. It has been applied successfully in various scientific and technical fields such as chemical engineering, biochemistry, biotechnology, and environment [10,12,13]. Few studies were reported on the RSM application to optimize the operation conditions of the coagulation-flocculation process applied for landfill leachate treatment.…”

Section: Introductionmentioning

confidence: 99%

Coagulation–flocculation process for landfill leachate pretreatment and optimization with response surface methodology

Smaoui

Chaabouni

Sayadi

et al. 2016

Desalination and Water Treatment

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The present paper aimed to characterize and treat a landfill leachate using a coagulationflocculation process. The leachate was obtained from a landfill in the city of Sousse, Tunisia. Its physicochemical characterization showed high levels of chemical oxygen demand (COD), ammonium, and heavy metal contents. The coagulation-flocculation process was applied as pretreatment effluent to reduce these pollutants. The key operating parameters (pH, coagulant dose, flocculant dose, and mixing speed in the flocculation step) on the coagulation-flocculation process were optimized using response surface methodology to investigate COD removal in landfill leachate. In this regard, a hybrid design was carried out to seek optimal conditions which were as follows: pH: 3.36; concentration of coagulant: 0.87 g/l; concentration of flocculant: 26 mg/l; and mixing speed: 48 rpm. These conditions have been proved experimentally.

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“…It is well known that the flocculation performance of the selected flocculants is governed by various factors, including the dosage of flocculant and various environmental parameters such as pH, mixing speed and time, temperature and retention time (Khayet et al 2011;Shi et al 2012). Its efficiency could be considerably enhanced after a proper optimization of these conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Researchers have tried a variety of processing methods, such as chemical coagulation (Verma et al 2012), adsorption (Laasri et al 2007), nanofiltration (Lau and Ismail 2009) and advanced oxidation (Manenti et al 2014), to eliminate dye matters in wastewater. Among them, flocculation is universally acknowledged as one of the most widespread pretreatment technologies due to its relatively low cost and good performance (Khayet et al 2011;Verma et al 2012;Zahrim et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Modeling and optimization of the flocculation processes for removal of cationic and anionic dyes from water by an amphoteric grafting chitosan-based flocculant using response surface methodology

Yang

et al. 2015

Environ Sci Pollut Res

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In this study, an amphoteric grafting chitosan-based flocculant (carboxymethyl chitosan-graft-poly(2-methacryloyloxyethyl) trimethyl ammonium chloride, denoted as CMC-g-PDMC) was applied to removal of the anionic and cationic dyes, acid Green 25 (AG25) and Basic Bright Yellow (7GL), from water. Flocculation conditions have been optimized by response surface methodology (RSM) on the basis of central composite design (CCD) using flocculant dosage, initial solution pH and temperature as input variables. The second-order and cubic regression models, which have been both tested by the analysis of variance (ANOVA), were constructed to link the output response (the dye removal factor) with the aforementioned input variables, respectively. The second-order regression model well described the process of AG25 removal, whereas the cubic one is more suitable for that of 7GL. The effects of those variables on the flocculation performance of CMC-g-PDMC for removal of the two dyes containing opposite charges from aqueous solutions have been studied, and the flocculation mechanisms including the interactive effects between various influencing factors have been discussed in detail also.

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Modelling and optimization of coagulation of highly concentrated industrial grade leather dye by response surface methodology

Cited by 164 publications

References 32 publications

Synthesis of NiFe2O4 nanoparticles for removal of anionic dyes from aqueous solution

Synthesis of NiFe2O4 nanoparticles for removal of anionic dyes from aqueous solution

Coagulation–flocculation process for landfill leachate pretreatment and optimization with response surface methodology

Modeling and optimization of the flocculation processes for removal of cationic and anionic dyes from water by an amphoteric grafting chitosan-based flocculant using response surface methodology

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