Effect of chloride on the one step electrochemical treatment of an industrial textile wastewater with tin dioxide anodes. The case of trichromy procion HEXL

Autor: Francisco Cases, J. Bonastre, Javier Fernández, Francisco Orts
Rok vydání: 2019
Předmět:
Environmental Engineering
Health
Toxicology and Mutagenesis
0208 environmental biotechnology
chemistry.chemical_element
02 engineering and technology
Electrolyte
010501 environmental sciences
Trichromy
Wastewater
Electrochemistry
Dyestuff wastewater
01 natural sciences
Chloride
Waste Disposal
Fluid
chemistry.chemical_compound
INGENIERIA TEXTIL Y PAPELERA
Chlorides
Oxidation state
medicine
Environmental Chemistry
Electrochemical treatment
Coloring Agents
Electrodes
0105 earth and related environmental sciences
Tin dioxide anodes
Biological Oxygen Demand Analysis
Titanium
Tin dioxide
06.- Garantizar la disponibilidad y la gestión sostenible del agua y el saneamiento para todos
Sulfates
Textiles
Chemical oxygen demand
Public Health
Environmental and Occupational Health
Tin Compounds
General Medicine
General Chemistry
Pollution
020801 environmental engineering
chemistry
Dyeing
Chlorine
Carbon
Oxidation-Reduction
Water Pollutants
Chemical
medicine.drug
Nuclear chemistry
QUIMICA FISICA
Zdroj: RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname
ISSN: 1879-1298
Popis: [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.
The authors wish to thank the Spanish Agencia Estatal de Investigacion (AEI) and European Union (FEDER funds) for the financial support (contract MAT2016-77742-C2-1-P and Red E3Tech CTQ2017-90659-REDT). The authors wish to acknowledge Tim Vickers for help with the English revision and Texcoy S.L. company (Spain) where the dyeing processes were done.
Databáze: OpenAIRE
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