Sıfır değerlikli demir (SDD), manyetit indirgenmiş grafen oksit (MiGO) ve kombinasyonlarının kolon sistemlerinde kullanılarak sudan arsenik giderilmesinde karşılaştırılması

Arsenic contamination in drinking water is a pressing global issue, with over 250 million individuals lacking access to water that meets the World Health Organization's recommended drinking water standard (DWS) limit of 10 μg/L. Arsenic, a confirmed carcinogen, poses significant health risks, necessitating efficient removal strategies. This study explores the potential of Magnetite reduced graphene oxide (MrGO) as an advanced alternative and its combined utilization with zero valent iron (ZVI) to achieve dual benefits by tackling their shortcomings. A novel approach to arsenic removal by integrating MrGO with ZVI in column systems is presented in this work. Findings suggest that combined media demonstrates adequate and sustained arsenic removal. Nanocomposite MrGO have been successfully coated onto sand to be used in continuous flow reactors and achieved arsenic removal performance comparable to that obtained with 61 times its mass of ZVI. Gradual cooling (GC) a new method developed for coating procedure, treated 7 times more watervolume that achieved DWS limit compared to the same dosage of MrGO-coated sand (MrGO-CS) without GC. This degree of performance improved when the two adsorbents are combined. Slight addition of MrGO with 0.2 % the weight of ZVI allowed combination media to treat 5.5 times more volume of water that achieved DWS limit compared to ZVI only media. By investigating optimal ratios and conditions, this study aims to provide insights for a scalable solution, contributing to the advancement of arsenic removal technologies and highlighting the MrGO-ZVI dual media potential.