Special Issue (Environmental Engineering)Paper
ADSORPTION REMOVAL OF PERFLUOROOCTANOIC ACID BY AMINE MODIFIED CARBON MATERIAL
2023 Volume 79 Issue 25 Article ID: 23-25039
Details
2023 Volume 79 Issue 25 Article ID: 23-25039
PFOA is a type of organic fluoride compound that is harmful to human health and living organisms. In this study, the surface of commercial activated carbon was coated with a cationic polymer, polydiallyldime-thylammonium chloride (PolyDADMAC), to carry anion exchange function. The amine-modified carbon material exhibited excellent adsorption capacity and improved adsorption performance at PolyDADMAC addition rates of 33% or higher. The adsorption kinetics were well described by the Freundlich equation, and the maximum adsorption capacity (365 mg/g) was obtained in the initial pH range of 3-4, and the adsorption capacity was stable at environmental water pH (6.5-8.5). The adsorption progressed quickly in the initial 30 minutes and reached equilibrium in about 2 hours. The amine-modified carbon material is expected to efficiently adsorb and remove PFOA, and it will be important to test and evaluate its durability under actual conditions (in the presence of competing substances).
