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- Title
Factorial design analysis of As(V) adsorption onto iron-aluminum binary oxide-doped clinoptilolite.
- Authors
Simsek, Esra Bilgin; Özdemir, Ercan; Tuna, Asli Ozge Avci; Beker, Ulker
- Abstract
Arsenic adsorption onto an iron-aluminum binary oxide-doped clinoptilolite was studied by using response surface methodology. The Box–Behnken experimental design was used to estimate the effects of major process parameters, namely pH (3–7), temperature (25–65°C), and initial arsenate (As(V)) concentration (0.5–9.5 mg L−1). The experimental data fitted to the empirical second-order model was found to be significant, as was evident from the modelF-value of 341.23. The coefficient of determination value of second-order regression model was found to be 0.9977 (Radj = 0.9948), indicating the accuracy and general availability of the model. The initial arsenic concentration of 9.4 mg L−1, pH of 6.0, and temperature f 62.4°C were found to be optimum for maximum As(V) uptake. The results showed that adsorption capacity increased with increasing temperature, indicating the endothermic nature of the adsorption process.
- Subjects
ARSENIC analysis; CLINOPTILOLITE; IRON-aluminum alloys; RESPONSE surfaces (Statistics); FACTORIAL experiment designs; ADSORPTION kinetics
- Publication
Desalination & Water Treatment, 2014, Vol 52, Issue 40-42, p7812
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2013.831783