Preparation of transition metal-modified biochar materials and their effects on the removal of bisphenol A by persulfate activation

Metal-loaded biochar (BC) catalytic systems are widely used for the removal of organic pollutants. However, there is still a lack of relevant research on the impact of different preparation conditions on the performance of synthetic materials. In the present research, CuO and Fe 2 O 3 were loaded on the surface of Ginkgo biloba BC by a hydrothermal method and a chemical co-precipitation method to prepare carbon-based metal catalytic materials. Bisphenol A (BPA) was selected as the target pollutant to study the activation effect of the metal-loaded BC to persulfate (PS). The results showed that the catalytic performance of the CuO/BC materials was better than that of Fe 2 O 3 /BC and Fe 2 O 3 /CuO/BC. By exploring the influence of the preparation process on the catalytic performance, it can be obtained that the optimal calcination temperature was 350°C and the optimal loading ratio was 2.5:1(w/w) for CuO/BC materials. The CuO/BC prepared under this condition could remove 81.5% of BPA within 60 min. The research results are beneficial to promote the efficient utilization of metal-loaded BC in the field of organic pollutant removal.