IJNCSE - SPECIAL ISSUE - ICCER 2015

INTERNATIONAL JOURNAL OF NANO CORROSION SCIENCE ENGINEERING

SPECIAL ISSUE

ICCER 2015

ISSN :2395 – 7018


Research Article

TITLE :

Electrochemical decolourisation of a blue dye by positive chloride ion produced in-situ

AUTHORS

M.Shanthi *[a], K. S. Sasireka [a] , S Rajendran [b], S Shanmugapriya[c], D Lakshmi[a] RM Joany[d] and A. S. Fouda[e]

[a] PG Department of Chemistry, M.V. Muthiah Government Arts College for Women,Dindigul-
624 001, Tamilnadu,India. Email: mshanthi1012@gmail.com, sasireka594@gmail.com
[b] RVS School of Engineering and Technology,Dindigul-624005, Tamil Nadu, India.
Email : susairajendran@gmail.com
[c] Department of Chemistry , Madha Engineering College, Kundrathur, Chennai, India.
Email: prikar_mgh@yahoo.co.in
[d] Sathyabama University, Chennai, India
[e] Professor of Physical Chemistry ,Faculty of Science ,Mansoura University , Egypt

ABSTRACT

The decolourisation efficiency of metals such as platinised titanium, mild steel, and aluminium, in decolourization of 500/200 ppm of Blue ARDE dye solution has been evaluated.decolourisation of the 100 ml of the dye solution was carried out in an undivided glass cell using graphite cathode and one of the metal specimens as anode. Sea water was used in the electrolysis process. No sodium chloride was used during electrolysis. A potential of was 6 volts was applied for 5 minutes. The current density was 50 mA/ cm 2. The optical density of the dye solution was measured before and after electrolysis, and hence the decolourisation efficiency (DE) was calculated. UV spectroscopy has been used to investigate the nature of dye before and after decolourisation. It is found that the decolourisation efficiency is in the decreasing order. Mild steel > Platinised titanium > Aluminium >. Positive chloride ion (Cl+) converts the coloured compounds into colourless products. Positive chloride ion was used to decolourise ( to convert) coloured compounds into colourless products in a cyclic process. The decolourisation efficiency is associated with readiness of the metal to accept the electrons donated by negative chloride ion (Cl-) to produce positive chloride ion (Cl+) which decolourises the coloured materials. This study will be useful to develop a green environment.


Key words: Decolourisation of dyes, Electrochemical decolourisation, Blue dye, green environment, green approach

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