Modeling and optimization of voltage and treatment time for electrocoagulation removal of hexavalent chromium

Bhatti, Manpreet S.; Reddy, A. S.; Kalia, Rajeev K.; Thukral, Ashwani Kumar

doi:10.1016/j.desal.2010.10.055

Cited by 76 publications

(26 citation statements)

References 28 publications

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“…This design can easily be constructed by augmenting the fractional factorial design that was used for estimating the first-order model (Khuri 1996;Myers et al 2005). The advantages of CCD lie in its use in sequential experimentation (Myers et al 2005;Kumar et al 2006;Garg et al 2008;Bhatti et al 2011;Alkhatib et al 2015;Rehman et al 2015). In the present study, the experimental design for calcium impregnation was done using the response surface methodology (RSM).…”

Section: Design Of Experimentsmentioning

confidence: 99%

Application of response surface methodology for optimization of biosorption of fluoride from groundwater using Shorea robusta flower petal

et al. 2017

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Fluoride pollution in groundwater is a major concern in rural areas. The flower petal of Shorea robusta, commonly known as sal tree, is used in the present study both in its native form and Ca-impregnated activated form to eradicate excess fluoride from simulated wastewater. Response surface methodology (RSM) was used for experimental designing and analyzing optimum condition for carbonization vis-à-vis calcium impregnation for preparation of adsorbent. During carbonization, temperature, time and weight ratio of calcium chloride to sal flower petal (SFP) have been considered as input factors and percentage removal of fluoride as response. Optimum condition for carbonization has been obtained as temperature, 500°C; time, 1 h and weight ratio, 2.5 and the sample prepared has been termed as calcium-impregnated carbonized sal flower petal (CCSFP). Optimum condition as analyzed by one-factor-at-a-time (OFAT) method is initial fluoride concentration, 2.91 mg/L; pH 3 and adsorbent dose, 4 g/L. CCSFP shows maximum removal of 98.5% at this condition. RSM has also been used for finding out optimum condition for defluoridation considering initial concentration, pH and adsorbent dose as input parameters.The optimum condition as analyzed by RSM is: initial concentration, 5 mg/L; pH 3.5 and adsorbent dose, 2 g/L. Kinetic and equilibrium data follow Ho pseudo-secondorder kinetic model and Freundlich isotherm model, respectively. Adsorption capacity of CCSFP has been found to be 5.465 mg/g. At optimized condition, CCSFP has been found to remove fluoride (80.4%) efficiently from groundwater collected from Bankura district in West Bengal, a fluoride-contaminated province in India. Adsorption rate constant of pseudo-second-order adsorption rate equation (g mgMaximum adsorption capacity of the adsorbent (mg/ g) q eSolid phase concentration of fluoride at equilibrium (mg/g) q tSolid phase concentration of fluoride at any time t (mg/g) DS Change in entropy (kJ/mol K) t Contact time (h)Electronic supplementary material The online version of this article

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Section: Design Of Experimentsmentioning

confidence: 99%

Application of response surface methodology for optimization of biosorption of fluoride from groundwater using Shorea robusta flower petal

et al. 2017

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“…According to Table 3, the values of lack of fit p-value corresponding to the quadratic model was less than 0.05. As a result, lack of fit for this model was negligible [39]. In Table 4, lack of fit for all models was significant (p-value > 0.05).…”

Section: Model Selectionmentioning

confidence: 63%

A cost-effective strategy for marine microalgae separation by electro-coagulation–flotation process aimed at bio-crude oil production: Optimization and evaluation study

Golzary

Imanian

Abdoli

et al. 2015

Separation and Purification Technology

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“…Bhatti et al [9] studied to optimize process variables, i.e. electrolysis voltage and treatment time for the removal of hexavalent chromium using electrocoagulation.…”

Section: Introductionmentioning

confidence: 99%

“…In order to comply with the strict environmental standards, it is essential for process industries to treat effluents to desired levels before discharging into the natural environment. Various researchers have used different techniques for chromium extraction including electro coagulation [8,9]; membrane processes [10]; low cost adsorbents including agriculture waste [11][12][13]; solvent extraction [14]; chemical precipitation and redissolution [15]. Amongst these techniques, two step chemical reduction and precipitation method is more popular in India.…”

Section: Introductionmentioning

confidence: 99%

Application of Central Composite Design approach for removal of chromium (VI) from aqueous solution using weakly anionic resin: Modeling, optimization, and study of interactive variables

Bajpai

Gupta

Dey

et al. 2012

Journal of Hazardous Materials

121

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Modeling and optimization of voltage and treatment time for electrocoagulation removal of hexavalent chromium

Cited by 76 publications

References 28 publications

Application of response surface methodology for optimization of biosorption of fluoride from groundwater using Shorea robusta flower petal

Application of response surface methodology for optimization of biosorption of fluoride from groundwater using Shorea robusta flower petal

A cost-effective strategy for marine microalgae separation by electro-coagulation–flotation process aimed at bio-crude oil production: Optimization and evaluation study

Application of Central Composite Design approach for removal of chromium (VI) from aqueous solution using weakly anionic resin: Modeling, optimization, and study of interactive variables

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