Enhanced Fluoride Removal in Wastewater Using Modified Activated Carbon in FCDI Systems

• Published in: Water, air, and soil pollution Vol. 235; no. 8; p. 530
• Main Authors: Xiong, Yongqi, Sun, Jian, Jiao, Yingjian, Tan, Tan, Zhang, Yang, Diao, Hongli, Xia, Shibin
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.08.2024; Springer Nature B.V
• Subjects: Activated carbon; Ammonium nitrogen; Atmospheric Protection/Air Quality Control/Air Pollution; Carbon; Carbon cycle; Climate Change/Climate Change Impacts; Cycle ratio; Deionization; Earth and Environmental Science; Efficiency; Effluents; Electric contacts; Electrical resistivity; Environment; Fluorides; Hydraulic retention time; Hydrogeology; Industrial wastes; Industrial wastewater; Industrial wastewater treatment; Municipal wastewater; Optimization; Parameter modification; Retention time; Soil Science & Conservation; Sustainability; Wastewater treatment; Water Quality/Water Pollution; Water treatment; Effluent conductivity; Desalination efficiency; Activated carbon; Flow capacitive deionization; Fluoride removal
• ISSN: 0049-6979; 1573-2932
• DOI: 10.1007/s11270-024-07352-6

This study provides a thorough evaluation of a flow capacitive deionization (FCDI) system using chemically modified activated carbon for improved fluoride removal from wastewater. Current literature indicates a gap in optimizing carbon modification techniques to enhance FCDI efficiency. The research systematically investigates an optimal alkali-to-carbon ratio of 2:1, which significantly enhances the specific surface area and pore structure of activated carbon, correlating with improved adsorption capacities and lower effluent fluoride concentrations. Durability tests across multiple operational cycles show consistent fluoride removal efficiency and minimal conductivity variations in the effluent. Additionally, the effects of operational parameters such as voltage and hydraulic retention time (HRT) are explored, demonstrating that extended contact times and optimized electrical settings further enhance system performance. The findings indicate that the modified FCDI system offers significant potential for sustainable, large-scale applications in municipal and industrial wastewater treatment, combining high efficiency with robust performance. This research establishes a foundation for future advancements in FCDI technology, aiming for cost-effective and environmentally sustainable water treatment solutions.