Abstract: Nano zero-valent iron (nZVI), as a new type of environmentally friendly material, is limited in the field of environmental pollution control due to its inherent instability and easy agglomeration. In this study, nano-zero-valent iron/carbon(Fe⁰/C) composites were prepared by using aerosol carbon as a carrier, and their effects on organic matter adsorption and nitrate reduction were studied. SEM results show that Fe⁰ is uniformly embedded in the inner and outer surfaces of spherical carbon in the form of nanoparticles, with a diameter ranging from 80 to 120 nm. Combined with BET and other characterization results, it is shown that Fe⁰/C composite has a high specific surface area. The results of adsorption and chemical reduction experiments showed that the maximum adsorption capacity of Rhodamine B was 853.7 mg/g, the removal rate of nitrate for 2 h was 50.6%, and 54.7% of the product was nitrogen, which proved the good reduction performance and practical application value of the composite material.

Key words: aerosol method, nano-zero valent iron, carbon support, adsorption, reduction