Effective Degradation of High Concentration Organic Pollutants Under Broad Ph Range by Carbonized Cicada Slough Through Sono-Fenton Oxidation

Abstract

To effectively remove toxic organic pollutants from the highly concentrated sewage, a Fe and heteroatoms(S, N) incorporated bio-carbon (Fe@HIC) was prepared from cicada slough(CS) by one-step hydrothermal process. Fe-Doped particles on the surface of the material present a three-dimensional network structure, which helps the dye to adhere. The introduced Fe 2+ and Fe 3+ endow the prepared Fe@HIC with prominent oxidation characteristic towards organic pollutants. Furthermore, the heteroatoms(S, N) present in CS itself enhance the surface polarity, thus improving the adsorption of pollutants through wetting. Fe@HIC remove 93.69% of Congo red (CR), 99.87% of methylene blue (MB) and 90.32% of tetracycline (TC) from wastewater at concentrations up to 300 mg/l in 240 min due to its unique microstructure and surface properties. In addition, the removal effect towards organic dye is little affected by pH and concentration of coexisting salt ions. This work provides an ideal strategy for the purification of industrial sewage containing highly concentrated organic pollution.

Keywords: Adsorption, pollutant, oxidation, Fe