Utilization of a new optical sensor unit to monitor the electrochemical elimination of selected dyes in water

Autor:	S Hostin, M Valica, T Černá
Rok vydání:	2017
Předmět:	Materials science genetic structures Analytical chemistry Photodetector Electrolyte Electrochemistry Signal Absorbance chemistry.chemical_compound chemistry Trypan Red Methyl orange sense organs Malachite green
Zdroj:	IOP Conference Series: Earth and Environmental Science. 92:012070
ISSN:	1755-1315 1755-1307
DOI:	10.1088/1755-1315/92/1/012070
Popis:	This paper presents results obtained by developed optical sensor, which consist from multi-wavelength LED light source and two photodetectors capable of measuring the change in optical signal along two different optical paths (absorbance and reflectance measurements). Arduino microcomputer was used for light source management and optical signal data measuring and recording. Analytical validation of developed optical sensor is presented in this paper. The performance of the system has been tested with varying water solution of dyes (malachite green, methyl orange, trypan red). These results show strong correlations between the optical signal response and colour change from the dyes. Sensor was used for continual in-situ monitoring of electrochemical elimination of selected dyes (current density 15.7 mA cm-2, electrolyte volume 4 L and NaCl concentration 2 g L-1). Maximum decolorization level varies with each dye. For malachite green was obtain 92,7 % decolorization (25 min); methyl orange 90,8% (8,5 min) and trypan red 84,7% decolorization after 33 min of electrochemical treatment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::321bedc1e0783b7518e73879e37ce9fc https://doi.org/10.1088/1755-1315/92/1/012070 Zobrazit plný text záznamu