Optimization of As(III) removal in hard water by electrocoagulation using central composite design with response surface methodology

Central composite design with response surface methodology was applied to optimize the main experimental parameters such as current, time, As(III) concentration, and hardness for arsenic (III) removal in hard water by the electrocoagulation process. The main aim was to find the optimum process param...

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Bibliographic Details
Published in:Desalination and water treatment 2016-12, Vol.57 (57), p.27827-27833
Main Authors: Yaghmaeian, Kamyar, Silva Martinez, Susana, Hoseini, Mohammad, Amiri, Hoda
Format: Article
Language:English
Subjects:
Analysis of variance
Arsenic
As(III)
Central composite design
Electrocoagulation
Hardness
Mathematical analysis
Mathematical models
Optimization
Pollutant removal
Regression analysis
Response surface methodology
Variance analysis
Water hardness
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Summary:Central composite design with response surface methodology was applied to optimize the main experimental parameters such as current, time, As(III) concentration, and hardness for arsenic (III) removal in hard water by the electrocoagulation process. The main aim was to find the optimum process parameters to maximize arsenic removal from the mathematical model equations developed in this study using R software. By variance and regression analysis, the linear regression equation was established as a predicted model. The R2 of 0.93 indicated that the equation was well fitted. The optimum condition of 99% of As(III) removal for current (A), time (min), As(III) concentration (ppb), and hardness (mg/L as CaCO3) is 0.07, 37, 274, and 324, respectively. ANOVA analysis shows no significant difference between the observed and predicted values (p-value > 0.05) which shows good fit to the model.
ISSN:1944-3986
1944-3994
1944-3986
DOI:10.1080/19443994.2016.1177735