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Removal of ammonia nitrogen in wastewater by indirect mechanism using electrochemical with Platinum electrode as anode Nature Environment and Pollution Technology
Removal of ammonia nitrogen in wastewater by indirect mechanism using electrochemical with Platinum electrode as anode Nature Environment and Pollution Technology
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Date
2018
Authors
Dương Phạm Hùng
Cong Minh Pham
Ngoc han T.Huynh
Yong Soon
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Research Projects
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Abstract
In this study, platinum (Pt) electrode was used as an anode to remove ammonia in the wastewater by
electrolysis. The batch experiments were carried out with various ammonia concentrations in the
synthetic wastewater at ambient temperature with and without chloride ions. The results indicated
that the optimal condition was pH = 7.0 and current density of 10 mA/cm2. The added NaCl concentration
had a significant effect on both, the ammonia removal rate and energy consumption. The ammonia
removal performance was 99% with initial ammonia concentration of 25 mg/L after 70 min electrolysis
at i=20 mA/cm2; pH 7.0 and 0.03% NaCl. The response functions described the correlation of four
variables with NH3 concentration, and NH3 removal efficiency was determined by the response
surface methodology (RMS), ANOVA tool with R2
NH3-N = 0.945 and R2
Eff = 0.871
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Keywords
"Ammonia nitrogen,
Electrochemical method,
Platinum electrode,
Breakpoint chlorination,
Box-Behnken design"