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Simultaneous Removal of Fluoride and Ammonia Using a Combined Process of Electrocoagulation and Hypochlorite Oxidation

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In this paper, a combined process of electrocoagulation and breakpoint chlorination for fluoride and ammonia removal was investigated in bench scale and pilot scale experiments. After the analysis of bench scale experiments, in electrochemical defluorination process, the residual concentration of fluoride was found to be 5.6 mg/L under the optimal conditions (pH = 6.0; current intensity = 1.0 A). In breakpoint chlorination process, the residual concentration of ammonia was 9.6 mg/L under the optimal conditions (pH = 10.0; NaClO concentration = 2.0‰). The operation performance was also evaluated by pilot scale experiments. The present study provided an economical and feasible way to treat high concentration of ammonia nitrogen and fluoride from electroplating wastewater.
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Keywords: AMMONIA; BREAKPOINT CHLORINATION; ELECTROCOAGULATION; FLUORIDE

Document Type: Research Article

Publication date: August 1, 2017

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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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