Abstract
It was established that application of bipolar membrane in a direct borohydride fuel cell (DBFC) with H2O2 co-generation enabled to keep constant pH in catholyte within 2.5 - 3.2 limits, which allowed us to carry out treatment of water polluted by organic compounds in fuel cell catholyte. Treatment of water was carried out by electro-Fenton and photo-electro-Fenton methods. With the view of efficiency, photo-electro-Fenton method of treatment was the most efficient, which enabled to decrease COD of catholytes containing (in each case) phenol, valsaren, 400 g/L dymethoate (BI-58) and valsaciper from 500 ppm to 30, 11, 9 and 3 ppm, respectively after 180 min treatment. By increasing the catholyte temperature from 20℃ to 40℃ in the same period, phenol COD fell to 5 ppm.
Highlights
Water is the unique resource that cannot be substituted by any alternative and it should be managed and conserved
We have developed original direct borohydride fuel cell (DBFC) with bipolar membrane that generates hydrogen peroxide (Figure 1) for treatment of water contaminated by phenol and pesticides—valsarel, valsaciper and BI-58
Electro-Fenton Process in Fuel Cell Electro-Fenton process was performed in cathode compartment of the DBFC. 500 ml catholyte circulated at the support of pump at 1000 ml/min rate
Summary
Water is the unique resource that cannot be substituted by any alternative and it should be managed and conserved. Polluted water is one of the main causes of diseases of live organisms, often with lethal end. (2015) Waste Water Treatment in Direct Borohydride Fuel Cell with Bipolar Membrane. Various technologies offered for water treatment, such as gravitational settling, filtration, aerial separation or adsorption over activated carbon are mechanical processes accompanied by streams of wastes after treatment, often containing toxic, biologically non-degradable organic substances. Advanced oxidation processes (AOPs) have been offered to resolve these problems. One of the most frequently used AOPs is Fenton reaction, based on hydroxyl radical formation at H2O2 decomposition in the presence of Fe2+ ions in acidic medium [1]-[12]:
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