Anodic oxidation of bisphenol A by different dimensionally stable electrodes.

Orhan T Can,Ramazan Keyikoglu,Muhammed M Tutun

doi:10.2166/wst.2021.092

Orhan T Can, Ramazan Keyikoglu + Show 1 more

Open Access

https://doi.org/10.2166/wst.2021.092

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Abstract

Bisphenol A (BPA) is a known endocrine disrupter and was detected in surface waters. We investigated the mineralization of BPA by electrochemical oxidation. Six different types of electrodes, including the boron-doped diamond (BDD), platinum (Pt), and mixed metal oxide (MMO) electrodes; RuO2-IrO2, RuO2-TiO2, IrO2-Ta2O5, and Pt-IrO2, were compared as the anode material. Total organic carbon (TOC) was analyzed to monitor the mineralization efficiency of BPA. BDD achieved 100% BPA mineralization efficiency in 180 min and at a current density of 125 mA/cm2, whereas the TOC removal efficiency of Pt was 60.9% and the efficiency of MMO electrodes ranged between 48 and 54%. BDD exhibited much lower specific energy consumption, which corresponds to a lower energy cost (USD63.4 /kg TOC). The effect of operational parameters showed that the BDD anode was much more affected by the current density, initial BPA concentration, and electrolyte concentration than the other parameters such as the stirring speed and interelectrode distance.

Highlights

Bisphenol A (BPA) is the precursor compound for the production of epoxy resins and polycarbonates (Prokop et al )
The present study investigated the performances of different anode materials including BDD, Pt, and MMO electrodes
This study investigated the performance of different anode materials on the mineralization of BPA by an Electrochemical oxidation (EO) process

Summary

Introduction

Bisphenol A (BPA) is the precursor compound for the production of epoxy resins and polycarbonates (Prokop et al ). Global bisphenol production, which was 1 million tons in the 1980s, increased to 2.2 million tons in 2009 and to 5.4 million tons in 2015 (Fiege et al ) This dramatic increase in the production of BPA requires taking preventive measures for its disposal and release to the environment. BPA is highly toxic in water sources and is known to be a teratogenic and endocrine disruptor in invertebrates (Flint et al ). It may cause contamination in water sources as a result of direct discharges from treatment plants and garbage storage facilities (Kang et al )

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