Industrial Coke as an Electrode Material for Environmental Remediation

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• 作者：Jamie Haner ; Keegan Rankin ; Dorin Bejan ; Nigel J. Bunce
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2008
• 出版时间：April 16, 2008
• 年：2008
• 卷：47
• 期：8
• 页码：2511 - 2517
• 全文大小：115K
• 年卷期：v.47,no.8(April 16, 2008)
• ISSN：1520-5045

文摘

Industrial coke was evaluated as a low-cost electrode material for environmental remediation, using the dyeOrange II as an example substrate. Coke was used as massive pieces in batch cells or in the ground form foruse in a packed-bed reactor. The loss of Orange II was faster when the supporting electrolyte containedchloride ion, and under these conditions the reaction involved hypochlorination. In the batch reactor, thecurrent efficiency for mineralization was only modest (4-14%). In the packed-bed reactor, the loss of bothstarting material and intermediates was fastest at high current and low flow rate, and a near-quantitativecurrent efficiency was achieved. The high current efficiency was explained by the greater surface area of theelectrodes in the packed-bed reactor compared with the batch reactor, and better contact between the solutionto be remediated and the coke particles. A drawback to the use of coke electrodes for the remediation ofaqueous wastes is their tendency to increase the total organic carbon content of an aqueous solution, especiallyunder anodic polarization.