Electrochemical treatment of dye wastewater using nickel foam electrode

Saravanathamizhan Ramanujam,Kaavya Muthumanickam

doi:10.5599/jese.1011

Saravanathamizhan Ramanujam, Kaavya Muthumanickam

Open Access

https://doi.org/10.5599/jese.1011

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Abstract

Removal of dye from wastewater has been investigated using the electrocoagulation method. Batch experiment has been conducted to remove the color from synthetically prepared acid red 87dye wastewater. Stainless steel and nickel foam sheets are used as cathode and anode, respectively. The effect of some operating parameters, such as current density, initial dye concentration and supporting electrolyte concentration, on color removal has been studied. It can be observed from the present investigations that the nickel foam electrode effectively removes color from the wastewater. Nickel hydroxyl species formed during the operation and also, nickel (II) hydroxide flocs formed in a subsequent stage, trap colloidal precipitates and make solid-liquid separation easier during the flotation stage. These stages of electrocoagulation must be optimized to design an economically feasible process.

Highlights

Wastewaters generated from various process industries contain various types of pollutants
The rate constants of dye wastewater decolorization for different dye concentrations are given in Table 1, where it can be noticed that the rate constant decreases from 0.1232 to 0.0171 min-1 with increasing dye concentration
The removal efficiency was found proportional to the concentration of supporting electrolyte and current density, but inversely proportional to the initial dye concentration

Summary

Introduction

Wastewaters generated from various process industries contain various types of pollutants. These pollutants must be treated, and only clean water must be disposed to the environment. Pollutants coming out from the textile industry contain organics and colours, and treatment of these pollutants is mandatory before letting them to the environment [1]. In this aspect, the cost-effective treatment techniques are required to treat a wide range of wastewater pollutants in a diverse range of conditions.

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