Electrochemical Degradation of Reactive Blue 21 and Synthetic Textile Effluent by Using Co47.5/C47.5-PVC5 Composite Electrode

Abstract

In this study, cobalt/graphite-polyvinyl chloride (Co 47.5 /C 47.5 -PVC 5 ) composite electrode was fabricated by mechanical alloying technique. The fabricated electrode and graphite rod were used as anode and cathode, respectively, in the decolourisation of aqueous C. I. Reactive Blue 21 (RB21) and synthetic textile effluent, containing a mixture of azo and anthraquinone dyes. The fabricated electrode showed high efficiency in the decolorisation of aqueous RB21 (99.95%) and synthetic textile effluent. This is further confirmed by the high reduction percentage (>75%) of COD and BOD 5 for both treated samples. The elemental composition study by using FESEM-EDX showed no significant changes in the composition of elements (C, Co and Cl) in the freshly fabricated electrode and after electrolysis of synthetic textile effluent. This showed that the fabricated electrode has a high mechanical strength and strong binding ability between C and Co due to the use of PVC as a binder.

Exploring the potential of highly efficient graphite/chitosan–PVC composite electrodes in the electrochemical degradation of Reactive Red 4

“…According to Shi et al, 22 as an electrode material, C possesses good electrical conductivity, high power density and good cycling stability. In the researchers' previous reported articles, a high percentage decolourization of Reactive Orange 4 39 and Reactive Blue 21 2 (99.12% and 99.95%, respectively) were obtained using graphite/ silver and graphite/cobalt composite electrodes, respectively.…”

“…Only 60-90% of the dyes used are fixed to textile fibrethe remainder (10-40%) may remain unfixed and thus released into the effluent. 2 This creates a severe water pollution problem which is harmful to human and aquatic life. According to Youseff et al, 3 dyes that absorb and scatter sunlight lead to algae growth.…”

Electrochemical Oxidation of Different Therapeutic Classes of Pharmaceuticals Using Graphite-PVC Composite Electrode

“…20,21 The COD of synthetic textile effluent was removed ≥75% using graphite rod anode for 45 min. 22 It was observed that the electrochemical oxidation process has achieved more than 90% removal of COD, BOD, and colour of textile dye using Ag/C composite anode after 100 min. 23 Indirect electrochemical treatment of landfill leachate showed 87% removal of COD using graphite-PVC anode by operating at 15 V applied voltage for 105 min of electrolysis.…”