摘要
Biochars with aerogel-like structures were prepared by incorporating mycelium. • Different methods of microbial modification result in different properties of biochars. • Biochars have excellent adsorption performance and regeneration potential for Cr(Ⅵ). • The adsorption capacities of biochars ares higher than that of most adsorbents. In this study, the microbial modification of the culture medium containing agar and potato extract was carried out by incorporating fungal mycelia. Then, the medium was freeze-dried to obtain a biomass carbon precursor with an aerogel structure. Finally, it was carbonized and activated to prepare biochar with a structure similar to “hamburger” (ALB-H), “pizza” (ALB-P), and “sandwich” (ALB-S). During this process, the differences in the physicochemical properties and adsorption performance of the biochar caused by different coating treatment methods were investigated. Among them, the specific surface area and total pore volume of ALB-P and ALB-S reached 2817.14 and 3149.46 m 2 /g, 1.51 and 1.64 cm 3 /g, respectively, which were 11.88–25.08% and 11.85–21.48% higher than that of the control group ALB (2517.97 m 2 /g and 1.35 cm 3 /g). In the adsorption test using hexavalent chromium as a model, the adsorption capacity of ALB, ALB-H, ALB-P, and ALB-S reached 415.10–552.75 mg/g at pH value of 2.0, which was superior to most adsorption materials. After 10 consecutive regeneration cycles, all adsorbents maintained more than 50% of their original adsorption capacity, demonstrating moderate recyclability that necessitates further structural optimization to boost cycling stability for real wastewater treatment applications. This study verified the effectiveness of incorporating fungal mycelia as a microbial modification method for further improving the performance of biochar, and established a new strategy for developing other biochars. Download: Download high-res image (159KB) Download: Download full-size image
危险品化学品经营许可证（带存储）