A recent study published in the Journal of Water Process Engineering explores an innovative approach to removing phthalates, specifically dimethyl phthalate (DMP), from water through the electro-Fenton process. Phthalates, common environmental pollutants, pose risks to ecosystems and human health, necessitating effective removal methods.

In this study, researchers developed a new heterogeneous electro-Fenton catalyst by embedding bimetallic iron (Fe) and cobalt (Co) into biochar derived from waste wine lees. This material, FeCo@NOPC, demonstrated superior performance in degrading DMP compared to biochar embedded with only Fe or Co. Within 5 hours, the system achieved 89% DMP removal and reduced total organic carbon (TOC) by 40%, operating under neutral conditions.

The primary mechanism driving DMP degradation was the generation of hydroxyl radicals (•OH) by the cathode, while the roles of anodic oxidation and cathode adsorption were minor. The study also highlighted the stability of the system, its energy efficiency, and its potential for repeated use. Additionally, the degradation pathways of DMP were analyzed using LC-MS techniques.

This research not only improves the effectiveness of the electro-Fenton process but also offers a sustainable use for wine lees, a waste byproduct of winemaking. By repurposing biochar from agricultural waste, this study presents a cost-effective and environmentally friendly method for removing persistent pollutants from wastewater.