Efficient removal of ammoniacal nitrogen from textile printing wastewater by electro-oxidation considering the effects of NaCl and NaOCl addition

In this study, an electro-oxidation (EO) process using graphite electrodes as electrode pairs was used for the removal of chemical oxygen demand (COD), ammoniacal nitrogen (NH4+-N), and color from real textile printing wastewater. The effects of solution pH, sodium chloride (NaCl) dosage, sodium hyp...

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Autores principales:	Bengisu Cifcioglu-Gozuacik, Sinem Merve Ergenekon, Bahar Ozbey-Unal, Cigdem Balcik, Ahmet Karagunduz, Nadir Dizge, Bulent Keskinler
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	ammonium removal cod removal dye removal electro-oxidation textile printing wastewater Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/92018b6327af4544ad1916ecb98be2ba
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spelling	oai:doaj.org-article:92018b6327af4544ad1916ecb98be2ba2021-11-06T11:16:47ZEfficient removal of ammoniacal nitrogen from textile printing wastewater by electro-oxidation considering the effects of NaCl and NaOCl addition0273-12231996-973210.2166/wst.2021.261https://doaj.org/article/92018b6327af4544ad1916ecb98be2ba2021-08-01T00:00:00Zhttp://wst.iwaponline.com/content/84/3/752https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732In this study, an electro-oxidation (EO) process using graphite electrodes as electrode pairs was used for the removal of chemical oxygen demand (COD), ammoniacal nitrogen (NH4+-N), and color from real textile printing wastewater. The effects of solution pH, sodium chloride (NaCl) dosage, sodium hypochlorite (NaOCl), which is the oldest and still most important chlorine-based bleach, dosage, and oxidation time were investigated on the removal efficiencies. Operating conditions for the EO reactor were applied to current density 1 mA/cm2, distance between the electrodes: 2 cm, 150 min operation time, and stirring speed of 500 rpm. At optimum conditions: pH 9.5, applied current density 1 mA/cm2, NaCl dosage of 8 g/L, NaOCl dosage of 44.4 mg/L and 150 min electro-oxidation time, the obtained removal efficiencies were 86.5% and 91.1% for chemical oxygen demand (COD) and ammoniacal nitrogen, respectively. Efficiency was increased to 91.1% for ammoniacal nitrogen from 21.7% after applying EO combined with NaOCl addition compared to individual NaOCl addition. HIGHLIGHTS Ammonia concentrations can be high in textile dye wastewater due to the usage of nitrogen-based substances.; Various oxidation processes are not effective for ammonium removal.; The aim of this study was to determine the efficiency of individual EO and EO with an addition of NaCl and NaOCl.; EO assisted NaOCl and NaCl is a promising technology for the oxidation of both carbon and nitrogen-based contaminants.;Bengisu Cifcioglu-GozuacikSinem Merve ErgenekonBahar Ozbey-UnalCigdem BalcikAhmet KaragunduzNadir DizgeBulent KeskinlerIWA Publishingarticleammonium removalcod removaldye removalelectro-oxidationtextile printing wastewaterEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 3, Pp 752-762 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ammonium removal cod removal dye removal electro-oxidation textile printing wastewater Environmental technology. Sanitary engineering TD1-1066
spellingShingle	ammonium removal cod removal dye removal electro-oxidation textile printing wastewater Environmental technology. Sanitary engineering TD1-1066 Bengisu Cifcioglu-Gozuacik Sinem Merve Ergenekon Bahar Ozbey-Unal Cigdem Balcik Ahmet Karagunduz Nadir Dizge Bulent Keskinler Efficient removal of ammoniacal nitrogen from textile printing wastewater by electro-oxidation considering the effects of NaCl and NaOCl addition
description	In this study, an electro-oxidation (EO) process using graphite electrodes as electrode pairs was used for the removal of chemical oxygen demand (COD), ammoniacal nitrogen (NH4+-N), and color from real textile printing wastewater. The effects of solution pH, sodium chloride (NaCl) dosage, sodium hypochlorite (NaOCl), which is the oldest and still most important chlorine-based bleach, dosage, and oxidation time were investigated on the removal efficiencies. Operating conditions for the EO reactor were applied to current density 1 mA/cm2, distance between the electrodes: 2 cm, 150 min operation time, and stirring speed of 500 rpm. At optimum conditions: pH 9.5, applied current density 1 mA/cm2, NaCl dosage of 8 g/L, NaOCl dosage of 44.4 mg/L and 150 min electro-oxidation time, the obtained removal efficiencies were 86.5% and 91.1% for chemical oxygen demand (COD) and ammoniacal nitrogen, respectively. Efficiency was increased to 91.1% for ammoniacal nitrogen from 21.7% after applying EO combined with NaOCl addition compared to individual NaOCl addition. HIGHLIGHTS Ammonia concentrations can be high in textile dye wastewater due to the usage of nitrogen-based substances.; Various oxidation processes are not effective for ammonium removal.; The aim of this study was to determine the efficiency of individual EO and EO with an addition of NaCl and NaOCl.; EO assisted NaOCl and NaCl is a promising technology for the oxidation of both carbon and nitrogen-based contaminants.;
format	article
author	Bengisu Cifcioglu-Gozuacik Sinem Merve Ergenekon Bahar Ozbey-Unal Cigdem Balcik Ahmet Karagunduz Nadir Dizge Bulent Keskinler
author_facet	Bengisu Cifcioglu-Gozuacik Sinem Merve Ergenekon Bahar Ozbey-Unal Cigdem Balcik Ahmet Karagunduz Nadir Dizge Bulent Keskinler
author_sort	Bengisu Cifcioglu-Gozuacik
title	Efficient removal of ammoniacal nitrogen from textile printing wastewater by electro-oxidation considering the effects of NaCl and NaOCl addition
title_short	Efficient removal of ammoniacal nitrogen from textile printing wastewater by electro-oxidation considering the effects of NaCl and NaOCl addition
title_full	Efficient removal of ammoniacal nitrogen from textile printing wastewater by electro-oxidation considering the effects of NaCl and NaOCl addition
title_fullStr	Efficient removal of ammoniacal nitrogen from textile printing wastewater by electro-oxidation considering the effects of NaCl and NaOCl addition
title_full_unstemmed	Efficient removal of ammoniacal nitrogen from textile printing wastewater by electro-oxidation considering the effects of NaCl and NaOCl addition
title_sort	efficient removal of ammoniacal nitrogen from textile printing wastewater by electro-oxidation considering the effects of nacl and naocl addition
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/92018b6327af4544ad1916ecb98be2ba
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Efficient removal of ammoniacal nitrogen from textile printing wastewater by electro-oxidation considering the effects of NaCl and NaOCl addition

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