Electrochemical Oxidation of EDTA in Nuclear Wastewater Using Platinum Supported on Activated Carbon Fibers

Abstract

A novel Pt/ACF (Pt supported on activated carbon fibers) electrode was successfully prepared with impregnation and electrodeposition method. Characterization of the electrodes indicated that the Pt/ACF electrode had a larger effective area and more active sites. Electrochemical degradation of ethylenediaminetetra-acetic acid (EDTA) in aqueous solution with Pt/ACF electrodes was investigated. The results showed that the 3% Pt/ACF electrode had a better effect on EDTA removal. The operational parameters influencing the electrochemical degradation of EDTA with 3% Pt/ACF electrode were optimized and the optimal removal of EDTA and chemical oxygen demand (COD) were 94% and 60% after 100 min on condition of the electrolyte concentration, initial concentration of EDTA, current density and initial value of pH were 0.1 mol/L, 300 mg/L, 40 mA/cm2 and 5.0, respectively. The degradation intermediates of EDTA in electrochemical oxidation with 3% Pt/ACF electrode were identified by gas chromatography-mass spectrum (GC-MS).

Electrocatalytic Hydrogenation of Biomass-Derived Organics: A Review

“…Thus, there is a need to clearly define relevant benchmark parameters that facilitate suitable alternative fuel characterization. Recent efforts have been applied toward identifying parameters and developing models that can predict a derived CN based on the contribution of organic functionalities (alcohols, esters, ethers, ketones, aldehydes, and aromatics) in simple, pure oxygenated hydrocarbons. , In the field of effluent treatment, previous studies that employ fundamentally similar principles of electrocatalysis often report instantaneous current efficiencies (ICE) in terms of the chemical oxygen demand (COD) and total organic carbon (TOC). ,,,,, Thus, non-universality in conversion efficiency parameters makes it difficult to draw common inferences and compare between different sets of data even with analogous underlying fundamentals. Parameter definition of efficient alternate chemical and fuel generation needs to be upgraded with present-day infrastructure and standardized across various fields to allow seamless integration of scientific information and the underlying reaction mechanisms.…”

“…Electrocatalytic conversion of organic matter from industrial wastewater and biomass feedstocks has been the subject of several studies in the last 20 years. ,,,,,− Others report the use of electrocatalytic methods to treat effluents containing phenols and other organic substrates, − ,, heavy metals, organic dyes, biodiesel, and ethylenediaminetetraacetic acid (EDTA) . This concept has also been deployed to reduce biomass-derived liquids that characteristically contain oxygen functionalities and unsaturated carbon bonds into stable, energy-dense, chemical-grade hydrocarbons. ,,, Electrocatalytic reduction of simple model compounds demonstrating conversion of aldehydes and ketones to alcohols, furfural to furfuryl alcohol to furans, and aromatic ring reduction of phenolic compounds has been previously demonstrated in the literature.…”