Cyanide Oxidation from Wastewater in a Flow Electrochemical Reactor
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- 作者：Marcos R. V. Lanza and Rodnei Bertazzoli
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2002
- 出版时间：January 9, 2002
- 年：2002
- 卷：41
- 期：1
- 页码：22 - 26
- 全文大小：60K
- 年卷期：v.41,no.1(January 9, 2002)
- ISSN：1520-5045
文摘
In this paper, a flow reactor using the Ti/70TiO2/30RuO2 (w/w) DSA-type electrode was designedfor the electrooxidation of cyanide in batch recirculating mode. The device performance wasevaluated in terms of the decay of the cyanide concentration as a function of the current density,flow rate, and initial pollutant concentration. The experiments show that cyanide electrooxidationpresents pseudo-first-order kinetics with respect to CN- ions. For the operational conditionsused in the experiments, the rate constant for cyanide oxidation was in the range from 3 × 10-5to 2 × 10-4 m s-1, with an optimum value of 1.5 × 10-4 m s-1 for a current density of 10 mAcm-2 and a linear speed of 0.22 m s-1. Using these parameters, 12 kWh is consumed for theoxidation of 1 kg of cyanide.