Effect of chloride on the one step electrochemical treatment of an industrial textile wastewater with tin dioxide anodes. The case of trichromy Procion HEXL
[EN] The resulting solutions from the cotton fabrics dyeing using the trichromy Procion HEXL, with NaCl as electrolyte, were electrochemically treated. These dyes have two azo groups as chromophores and two monochlorotriazinic groups as reactive groups in their structure. The combined oxidation/redu...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/140414 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/140414 |
| Access Level: | acceso abierto |
| Palabra clave: | Tin dioxide anodes Electrochemical treatment Dyestuff wastewater Trichromy Chloride INGENIERIA TEXTIL Y PAPELERA QUIMICA FISICA 06.- Garantizar la disponibilidad y la gestión sostenible del agua y el saneamiento para todos |
| Sumario: | [EN] The resulting solutions from the cotton fabrics dyeing using the trichromy Procion HEXL, with NaCl as electrolyte, were electrochemically treated. These dyes have two azo groups as chromophores and two monochlorotriazinic groups as reactive groups in their structure. The combined oxidation/reduction at 125 mA cm¿2 in a filter-press cell without compartment separation was carried out using an anode of Ti/SnO2¿Sb¿Pt and a cathode of stainless steel. This procedure has been effective in previous experiments using sulphate as electrolyte. A significant decrease in total organic carbon (TOC), chemical oxygen demand (COD), and total nitrogen (TN) was obtained. Moreover, the process took place efficiently. The average oxidation state (AOS) and the carbon oxidation state (COS) data confirmed the presence of stable oxidized intermediates in the electrolysed solution. The chromatography and the UV¿Visible spectrophotometry assays indicated that full decolourisation is obtained at a loaded charge of around 0.81 Ah L¿1 which is associated with an electrical energy per order (EEO) of 1.20 kWh m¿3. |
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