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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 13, No. 4, 2016, pp. 985-994
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Bioline Code: st16093
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 13, No. 4, 2016, pp. 985-994
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Optimization of ammonia removal by ion-exchange resin using response surface methodology
Ding, Y. & Sartaj, M.
Abstract
The ability of ion-exchange resin for ammonia
removal from aqueous solution was studied. The results
showed that Amberlite ion-exchange resin was effective in
removing ammonia from aqueous solution. Factorial design
and response surface methodology were applied to evaluate
and optimize the effects of pH, resin dose, contact time,
temperature and initial ammonia concentration. Low pH
condition was preferred with the optimum pH found to be 6.
High resin dose generated high removal rate and low exchange
capacity. Results of factorial design and response surface
methodology showed that temperature was not a significant
parameter. The model prediction was in good agreement with
observed data (R2 = 0.957). The optimum Qe was 28.78 mg/
g achieved at pH = 6 and initial TAN concentration of
3000 mg/L. The kinetics followed the pseudo-second-order
kinetic model (R2 = 0.999). Equilibrium data were fitted to
Langmuir and Freundlich isotherm models with Langmuir
model providing a slightly better predication (R2 = 0.996).
The resin was completely regenerated by 2 N H2SO4.
Keywords
Ammonia; Ion-exchange; Isotherm; Factorial design; Response surface methodology
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