Electrolytic Processes for Pollution Treatment and Pollution Prevention

Decolourisation of real textile waste using electrochemical techniques: Effect of electrode composition

“…Overall, the presence of NaCl aids the removal of both the colour and the TOC content, with levels of removal reached that are far greater than in the absence of NaCl. The reasons for the rapid removal of colour in the presence of NaCl are well known and are due to the electrochemical formation of chlorine gas (Cl 2 ) at the anode [22]:…”

Oxidation of the pesticide atrazine at DSA® electrodes

“…According to the literature, the increased rate of organic removal is due to the formation of chlorine gas (Cl 2 ) and hypochlorite (ClO − ), which are both powerful oxidising agents. Chlorine gas is formed at the anode according to [28]:…”

“…hypochlorous acidHOCl). However, as the electrolysis proceeds hypochlorite is rapidly produced [28] and, due to the greater solubility of ClO − over Cl − [29], it is probable that the predominant mechanism in aqueous media is via ClO − . The chlorine evolution reaction is a reaction that occurs relatively easily at a wide spectrum of electrodes [26].…”

Electrochemical desulfurization of geothermal fluids under high temperature and pressure

“…This is a gas phase catalytic process that is performed at high temperature. Various electrochemical versions of the Claus process were proposed to oxidize H 2 S from gas streams in molten electrolytes at temperatures up to 900°C [18][19][20]. A similar electrochemical process, using a molten salt electrolyte, has been proposed for the removal of SO x from flue gas streams [21].…”