Abstract
Electrocoagulation is a promising technology for the removal of colloids from different types of wastewater and it has also demonstrated good efficiencies for the breaking-up of emulsions. It consists of the dissolution of aluminum or iron anodes, promoting the formation of coagulant reagents in wastewater that helps to coagulate pollutants and the formation of bubbles that favors the mixing (electroflocculation) and the removal of suspended solids by flotation (electroflotation). During the recent years, the combination of this technology with other treatment technologies has become a hot topic looking for a synergistic improvement in the efficiencies. This work aims to review some of the more recent works regarding this topic, in particular the combination of electrocoagulation with ozonation, adsorption and ultrasound irradiation.
Highlights
Electrochemical treatment techniques have attracted a great deal of attention because of their versatility and environmental compatibility
Applications studied in the recent years range from the oxidation of organic pollutants contained in wastewater to the electroremediation of soils
The objective of the present manuscript is to review the potential of electrocoagulation for the treatment of industrial effluents coupling it with four types of processes:
Summary
Electrochemical treatment techniques have attracted a great deal of attention because of their versatility and environmental compatibility. Recent studies shows many promising applications of electrocoagulation in the treatment of lowland surface water [19], water [6,20,21], metal plating wastes [22], other types of industrial wastewater [5,23,24,25,26,27,28,29,30], urban wastewater [31,32,33] and even in disinfection [34,35] It is one of the most promising environmental technologies based on electrochemical engineering [36,37]. The objective of the present manuscript is to review the potential of electrocoagulation for the treatment of industrial effluents coupling it with four types of processes: Electrocoagulation-ozone processes Electrocoagulation- adsorption processes Electrocoagulation-ultrasound processes Electrocoagulation-pulses processes
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